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Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic...

2

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Structure of All-Polymer Solar Structure of All-Polymer Solar Cells Impedes Efficiency Structure of All-Polymer Solar Cells Impedes Efficiency Print Wednesday, 27 October 2010 00:00 Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

3

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

4

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

5

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

6

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

7

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Structure of All-Polymer Solar Cells Impedes Efficiency Print Structure of All-Polymer Solar Cells Impedes Efficiency Print Organic solar cells are made of thin layers of interpenetrating structures from two different conducting organic materials and are increasingly popular because they are both potentially cheaper to make than those currently in use and can be "painted" or printed onto a variety of surfaces, including flexible films made from the same material as most soda bottles. A large community is exploring a number of promising material combinations (polymer/fullerene, polymer/inorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure, operation, and limitations. A team of researchers from North Carolina State University and the UK has now found, through microscopy and resonant scattering and reflectivity studies at ALS Beamlines 6.3.2 and 5.3.2, that the low rate of energy conversion in model all-polymer solar cells is caused by domains that are too large and interfaces that are not sharp enough. This insight will lead to new approaches to all-polymer device technology that will help realize the intrinsic potential of these materials.

8

Structure of All-Polymer Solar Cells Impedes Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

device technology that will help realize the intrinsic potential of these materials. Solar Panels To Go Photovoltaic cells are a key component of most visions of a...

9

Nanocrystal Solar Cells  

E-Print Network (OSTI)

Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensional5 All-inorganic nanocrystal solar cells 5.1 Introduction Inoperation of organic based solar cells and distinguish them

Gur, Ilan

2006-01-01T23:59:59.000Z

10

Solar Cells  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Here we are using microwaves for increasing the surface area of titania nanopowders for energy based applications like dye sensitized solar...

11

Silicon solar cell assembly  

DOE Patents (OSTI)

A silicon solar cell assembly comprising a large, thin silicon solar cell bonded to a metal mount for use when there exists a mismatch in the thermal expansivities of the device and the mount.

Burgess, Edward L. (Albuquerque, NM); Nasby, Robert D. (Albuquerque, NM); Schueler, Donald G. (Albuquerque, NM)

1979-01-01T23:59:59.000Z

12

Amorphous silicon solar cells  

SciTech Connect

The fabrication, performance, and applications of a-Si solar cells are discussed, summarizing the results of recent experimental investigations and trial installations. Topics examined include the fundamental principles and design strategies of solar power installations; the characteristics of monocrystalline-Si solar cells; techniques for reducing the cost of solar cells; independent, linked, and hybrid solar power systems; proposed satellite solar power systems; and the use of solar cells in consumer appliances. Consideration is given to the history of a-Si, a-Si fabrication techniques, quality criteria for a-Si films, solar cells based on a-Si, and techniques for increasing the efficiency and lowering the cost of a-Si solar cells. Graphs, diagrams, drawings, and black-and-white and color photographs are provided. 136 references.

Takahashi, K.; Konagai, M.

1986-01-01T23:59:59.000Z

13

Solar Cell Silicon  

Science Conference Proceedings (OSTI)

Jul 31, 2011 ... About this Symposium. Meeting, 2012 TMS Annual Meeting & Exhibition. Symposium, Solar Cell Silicon. Sponsorship, The Minerals, Metals...

14

Heterojunction solar cell  

DOE Patents (OSTI)

A high-efficiency single heterojunction solar cell is described wherein a thin emitter layer (preferably Ga[sub 0.52]In[sub 0.48]P) forms a heterojunction with a GaAs absorber layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the emitter layer. 1 fig.

Olson, J.M.

1994-08-30T23:59:59.000Z

15

Heterojunction solar cell  

DOE Patents (OSTI)

A high-efficiency single heterojunction solar cell wherein a thin emitter layer (preferably Ga.sub.0.52 In.sub.0.48 P) forms a heterojunction with a GaAs absorber layer. The conversion effiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the emitter layer.

Olson, Jerry M. (Lakewood, CO)

1994-01-01T23:59:59.000Z

16

Solar Cell Silicon  

Science Conference Proceedings (OSTI)

... continued and costs have been cut dramatically along the production value chain. The most important feedstock for crystalline solar cells is high purity silicon .

17

Lateral superlattice solar cells  

DOE Green Energy (OSTI)

A novel structure which comprises of a lateral superlattice as the active layer of a solar cell is proposed. If the alternating regions A and B of a lateral superlattice ABABAB... are chosen to have a Type-II band offset, it is shown that the performance of the active absorbing region of the solar cell is optimized. In essence, the Type-II lateral superlattice region can satisfy the material requirements for an ideal solar cells active absorbing region, i.e. simultaneously having a very high transition probability for photogeneration and a very long minority carrier recombination lifetime.

Mascarenhas, A.; Zhang, Y. [National Renewable Energy Lab., Golden, CO (United States); Millunchick, J.M.; Twesten, R.D.; Jones, E.D. [Sandia National Labs., Albuquerque, NM (United States)

1997-10-01T23:59:59.000Z

18

Thermal Management of Solar Cells  

E-Print Network (OSTI)

Nanostructured Silicon- Based Solar Cells, 2013. X. C. Tong,compact heat exchangers, and solar cells," Sci-Tech News,2011. C. J. Chen, Physics of Solar Energy: Wiley, 2011. M.

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

19

Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical...  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Solar Cells: Spin-Cast Bulk Heterojunction Solar Cells: A Dynamical Investigation Print Wednesday,...

20

Solar cell array interconnects  

DOE Patents (OSTI)

Electrical interconnects are disclosed for solar cells or other electronic components using a silver-silicone paste or a lead-tin (Pb-Sn) no-clean fluxless solder cream, whereby the high breakage of thin (<6 mil thick) solar cells using conventional solder interconnect is eliminated. The interconnects of this invention employs copper strips which are secured to the solar cells by a silver-silicone conductive paste which can be used at room temperature, or by a Pb-Sn solder cream which eliminates undesired residue on the active surfaces of the solar cells. Electrical testing using the interconnects of this invention has shown that no degradation of the interconnects developed under high current testing, while providing a very low contact resistance value. 4 figs.

Carey, P.G.; Thompson, J.B.; Colella, N.J.; Williams, K.A.

1995-11-14T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Photovoltaic solar cell  

DOE Patents (OSTI)

A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electicity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J

2013-11-26T23:59:59.000Z

22

Solar cell array interconnects  

DOE Patents (OSTI)

Electrical interconnects for solar cells or other electronic components using a silver-silicone paste or a lead-tin (Pb-Sn) no-clean fluxless solder cream, whereby the high breakage of thin (<6 mil thick) solar cells using conventional solder interconnect is eliminated. The interconnects of this invention employs copper strips which are secured to the solar cells by a silver-silicone conductive paste which can be used at room temperature, or by a Pb-Sn solder cream which eliminates undesired residue on the active surfaces of the solar cells. Electrical testing using the interconnects of this invention has shown that no degradation of the interconnects developed under high current testing, while providing a very low contact resistance value.

Carey, Paul G. (Mountain View, CA); Thompson, Jesse B. (Brentwood, CA); Colella, Nicolas J. (Livermore, CA); Williams, Kenneth A. (Livermore, CA)

1995-01-01T23:59:59.000Z

23

Quantum Dot Solar Cells: Preprint  

DOE Green Energy (OSTI)

Presented at the 2001 NCPV Program Review Meeting: Potential of quantum dot solar cells to increase the maximum attainable thermodynamic conversion efficiency of solar photoconversion to about 66%.

Nozik, A. J.

2001-10-01T23:59:59.000Z

24

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 06 · Solar Cell Materials & Structures 1Montana State University: Solar Cells Lecture 6: Solar Cells Solar Cell Technologies · A) Crystalline Silicon · B) Thin Film · C) Group III-IV Cells 2Montana State University: Solar Cells Lecture 6: Solar

Kaiser, Todd J.

25

Broad spectrum solar cell  

DOE Patents (OSTI)

An alloy having a large band gap range is used in a multijunction solar cell to enhance utilization of the solar energy spectrum. In one embodiment, the alloy is In.sub.1-xGa.sub.xN having an energy bandgap range of approximately 0.7 eV to 3.4 eV, providing a good match to the solar energy spectrum. Multiple junctions having different bandgaps are stacked to form a solar cell. Each junction may have different bandgaps (realized by varying the alloy composition), and therefore be responsive to different parts of the spectrum. The junctions are stacked in such a manner that some bands of light pass through upper junctions to lower junctions that are responsive to such bands.

Walukiewicz, Wladyslaw (Kensington, CA); Yu, Kin Man (Lafayette, CA); Wu, Junqiao (Richmond, CA); Schaff, William J. (Ithaca, NY)

2007-05-15T23:59:59.000Z

26

Thermal Management of Solar Cells  

E-Print Network (OSTI)

of the valence band. Solar radiation enters the p-n junctiona fraction of absorbed solar radiation energy is turned intoenclosure, the radiation energy from the solar cell light

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

27

Enabling Thin Silicon Solar Cell Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Enabling Thin Silicon Solar Cell Technology Enabling Thin Silicon Solar Cell Technology Print Friday, 21 June 2013 10:49 Generic silicon solar cells showing +45, -45, and...

28

Heterojunction solar cells  

DOE Green Energy (OSTI)

A qualitative description of semiconductor/semiconductor heterojunction solar cells is given. The two groups of heterojunctions of greatest economic potential, very highly efficient cells for concentrator applications and moderately efficient thin film cells for flat plates, are described with examples. These examples illustrate the role of heterojunctions in surface passivation, monolithic multijunction devices, devices with semiconductors of only one conductivity type, and low-temperature fabrication techniques.

Wagner, S.

1978-01-01T23:59:59.000Z

29

Monolithic tandem solar cell  

DOE Patents (OSTI)

It is an object of the invention to provide a monolithic tandem photovoltaic solar cell which is highly radiation resistant and efficient; in which the energy bandgap of the lower subcell can be tailored for specific applications; solar cell comprising layers of InP and GaInAsP (or GaInAs), where said photovoltaic cell is useful, for example, in space power applications; having an improved power-to-mass ratio; in which subcells are lattice-matches; and are both two terminal and three terminal monolithic tandem photovoltaic solar cells. To achieve the foregoing and other objects and in accordance with the purpose of the present invention, as embodied and broadly described herein, the monolithic tandem photovoltaic solar cell may comprise; (a) an InP substrate having an upper surface; (b) a first photoactive subcell on the upper surface of the InP substrate; wherein the first subcell comprises GaInAs (which could include GaInAsP) and includes a homojunction; and (c) a second photoactive subcell on the first subcell; wherein the second subcell comprises InP and includes a homojunction. The cell is described in detail. 5 figs., 2 tabs.

Wanlass, M.W.

1989-11-03T23:59:59.000Z

30

Monolithic tandem solar cell  

DOE Patents (OSTI)

A single-crystal, monolithic, tandem, photovoltaic solar cell is described which includes (a) an InP substrate having upper and lower surfaces, (b) a first photoactive subcell on the upper surface of the InP substrate, and (c) a second photoactive subcell on the first subcell. The first photoactive subcell is GaInAsP of defined composition. The second subcell is InP. The two subcells are lattice matched. The solar cell can be provided as a two-terminal device or a three-terminal device.

Wanlass, Mark W. (Golden, CO)

1991-01-01T23:59:59.000Z

31

Amorphous semiconductor solar cell  

SciTech Connect

A solar cell comprising a back electrical contact, amorphous silicon semiconductor base and junction layers and a top electrical contact includes in its manufacture the step of heat treating the physical junction between the base layer and junction layer to diffuse the dopant species at the physical junction into the base layer.

Dalal, Vikram L. (Newark, DE)

1981-01-01T23:59:59.000Z

32

Nanostructured plasmonics silicon solar cells  

Science Conference Proceedings (OSTI)

We report a plasmonics silicon solar cell design, with the possibility of lower cost and higher efficiency. The proposed solar cell consists of a radial p-n junction silicon nanopillar arrays in combination with metallic nanoparticles resolved at the ... Keywords: Antireflection coating, Optical absorption, Power conversion efficiency, Solar cells

Pushpa Raj Pudasaini, Arturo A. Ayon

2013-10-01T23:59:59.000Z

33

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 08 · Solar Cell Characterization 1Montana State University: Solar Cells Lecture 8: Characterization Solar Cell Operation n Emitter p Base Rear completing the circuit 2Montana State University: Solar Cells Lecture 8: Characterization Solar Cell

Kaiser, Todd J.

34

Fabrication and Characterization of Organic Solar Cells  

E-Print Network (OSTI)

8? WrfelP. Physicsofsolarcells:fromprinciplestoPhotocellforConverting SolarRadiationintoElectricalgeneration photovoltaics: solar cells for 2020 and

Yengel, Emre

2010-01-01T23:59:59.000Z

35

Nanowire-based All Oxide Solar Cells  

E-Print Network (OSTI)

photovoltaic performance is widely applicable to any nanowire solar cellfilm solar cells. The principal photovoltaic (PV) materialphotovoltaic performance is widely applicable to any nanowire solar cell

Yang, Peidong

2009-01-01T23:59:59.000Z

36

Available Technologies:Improved Amorphous Silicon Solar Cells  

Solar cells; Large solar panels; ADVANTAGES. Increased performance ; Less expensive than crystalline silicon solar cells; Enables thinner, lighter solar panels;

37

Solar Cells Hellas SA | Open Energy Information  

Open Energy Info (EERE)

Cells Hellas SA Jump to: navigation, search Name Solar Cells Hellas SA Place Athens, Greece Product Greek manufacturer of PV wafers, cells and modules. References Solar Cells...

38

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

with Photovoltaic Cells Contains initial work for the current PV kit experiments o Solar Cells o Solar Electric Arrays o Photovoltaics in Arrays: Solar Cells Generating Electricity http://www.californiasolarcenter.org/history_pv and the Solar Radiation Monitoring Laboratory

Kaiser, Todd J.

39

Solar cell module lamination process  

DOE Patents (OSTI)

A solar cell module lamination process using fluoropolymers to provide protection from adverse environmental conditions and thus enable more extended use of solar cells, particularly in space applications. A laminate of fluoropolymer material provides a hermetically sealed solar cell module structure that is flexible and very durable. The laminate is virtually chemically inert, highly transmissive in the visible spectrum, dimensionally stable at temperatures up to about 200.degree. C. highly abrasion resistant, and exhibits very little ultra-violet degradation.

Carey, Paul G. (Mountain View, CA); Thompson, Jesse B. (Brentwood, CA); Aceves, Randy C. (Tracy, CA)

2002-01-01T23:59:59.000Z

40

Thermal Management of Solar Cells.  

E-Print Network (OSTI)

??The focus on solar cells as a source of photovoltaic energy is rapidly increasing nowadays. The amount of sun's energy entering earth surface in one (more)

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

TUTORIALS: Solar Cell Operation - TMS  

Science Conference Proceedings (OSTI)

Jan 21, 2008 ... This animated tutorial describes the basics of solar cell operation. It defines the photovoltaic effect, discusses electron and current flow within a...

42

Monolithic tandem solar cell  

DOE Patents (OSTI)

A single-crystal, monolithic, tandem, photovoltaic solar cell is described which includes (a) an InP substrate having upper and lower surfaces, (b) a first photoactive subcell on the upper surface of the InP substrate, (c) a second photoactive subcell on the first subcell; and (d) an optically transparent prismatic cover layer over the second subcell. The first photoactive subcell is GaInAsP of defined composition. The second subcell is InP. The two subcells are lattice matched. 9 figs.

Wanlass, M.W.

1994-06-21T23:59:59.000Z

43

Monolithic tandem solar cell  

DOE Patents (OSTI)

A single-crystal, monolithic, tandem, photovoltaic solar cell is described which includes (a) an InP substrate having upper and lower surfaces, (b) a first photoactive subcell on the upper surface of the InP substrate, (c) a second photoactive subcell on the first subcell; and (d) an optically transparent prismatic cover layer over the second subcell. The first photoactive subcell is GaInAsP of defined composition. The second subcell is InP. The two subcells are lattice matched.

Wanlass, Mark W. (Golden, CO)

1994-01-01T23:59:59.000Z

44

Nanocrystal Solar Cells  

E-Print Network (OSTI)

absorption of the solar spectrum. Also, like branched CdSeonly a fraction of the solar spectrum may be utilized for PVonly part of the solar spectrum. As such, blends should

Gur, Ilan

2006-01-01T23:59:59.000Z

45

The challenges of organic polymer solar cells  

E-Print Network (OSTI)

The technical and commercial prospects of polymer solar cells were evaluated. Polymer solar cells are an attractive approach to fabricate and deploy roll-to-roll processed solar cells that are reasonably efficient (total ...

Saif Addin, Burhan K. (Burhan Khalid)

2011-01-01T23:59:59.000Z

46

Nontoxic quantum dot research improves solar cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Nontoxic quantum dot research improves solar cells Nontoxic quantum dot research improves solar cells Solar cells made with low-cost, nontoxic copper-based quantum dots can achieve...

47

Research highlights potential for improved solar cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Potential for improved solar cells Research highlights potential for improved solar cells Research has shown that carrier multiplication is a real phenomenon in tiny semiconductor...

48

ELECTROSPUN POLYMER-FIBER SOLAR CELL.  

E-Print Network (OSTI)

??A study of fabricating the first electrospun polymer-fiber solar cell with MEHPPV is presented. Motivation for the work and a brief history of solar cell (more)

Nagata, Shinobu

2011-01-01T23:59:59.000Z

49

Ideal Configuration For Nanoscale Solar Cells - Energy ...  

Technology Marketing Summary The standard design of excitonic solar cells, which includes most organic-based solar cells, is ideal in only two out of ...

50

Available Technologies: Thinner Film Silicon Solar Cells  

Berkeley Lab scientists have designed a new approach to create highly efficient thin film silicon solar cells. This technology promises to lower solar cell material ...

51

Bulb mounting of solar cell  

SciTech Connect

An energy converting assembly is provided for parasiting of light from a fluorescent light bulb utilizing a solar cell. The solar cell is mounted on a base member elongated in the dimension of elongation of the fluorescent bulb, and electrical interconnections to the cell are provided. A flexible sheet of opaque material having a flat white interior reflective surface surrounds the fluorescent bulb and reflects light emitted from the bulb back toward the bulb and the solar cell. The reflective sheet is tightly held in contact with the bottom of the bulb by adhesive, a tie strap, an external clip, or the like.

Thompson, M.E.

1983-04-05T23:59:59.000Z

52

Module level solutions to solar cell polarization  

Science Conference Proceedings (OSTI)

A solar cell module includes interconnected solar cells, a transparent cover over the front sides of the solar cells, and a backsheet on the backsides of the solar cells. The solar cell module includes an electrical insulator between the transparent cover and the front sides of the solar cells. An encapsulant protectively packages the solar cells. To prevent polarization, the insulator has resistance suitable to prevent charge from leaking from the front sides of the solar cells to other portions of the solar cell module by way of the transparent cover. The insulator may be attached (e.g., by coating) directly on an underside of the transparent cover or be a separate layer formed between layers of the encapsulant. The solar cells may be back junction solar cells.

Xavier, Grace (Fremont, CA), Li; Bo (San Jose, CA)

2012-05-29T23:59:59.000Z

53

Nanowire-based All Oxide Solar Cells  

E-Print Network (OSTI)

1999; 7: 471. 6) Rai, B.P. Solar Cells, 1988, 25, 265. 7)Paul, G.K. , Sakurai, T. , Solar Energy, 2006, 80, 715. 9)1999, 2) Green, M.A. , Solar Cells, 1982, Prentice-Hall,

Yang, Peidong

2009-01-01T23:59:59.000Z

54

Definition: Solar cell | Open Energy Information  

Open Energy Info (EERE)

Solar cell Solar cell (Redirected from Definition:PV cell) Jump to: navigation, search Dictionary.png Solar cell Converts light into electrical energy. Traditional solar cells are made from silicon; second-generation solar cells (thin-film solar cells) are made from amorphous silicon or nonsilicon materials such as cadmium telluride; and third-generation solar cells are being made from variety of new materials, including solar inks, solar dyes, and conductive plastics.[1][2] View on Wikipedia Wikipedia Definition A solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect. It is a form of photoelectric cell (in that its electrical characteristics-e.g. current, voltage, or resistance-vary

55

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 10 · Summary 1Montana State University: Solar Cells Lecture 10: Summary Summer 2010 Class Montana State University: Solar Cells Lecture 10: Summary 2 Solar Cell Operation n Emitter p Base Rear Contact Antireflection coating Absorption of photon

Kaiser, Todd J.

56

Solar cell with back side contacts  

SciTech Connect

A III-V solar cell is described herein that includes all back side contacts. Additionally, the positive and negative electrical contacts contact compoud semiconductor layers of the solar cell other than the absorbing layer of the solar cell. That is, the positive and negative electrical contacts contact passivating layers of the solar cell.

Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J; Wanlass, Mark Woodbury; Clews, Peggy J

2013-12-24T23:59:59.000Z

57

Thermal Management of Solar Cells  

E-Print Network (OSTI)

as a source of photovoltaic energy is rapidly increasingphotovoltaic cells under concentrated illumination: a critical review," Solar Energyphotovoltaic/thermal collector, PV/T, and it utilizes both electrical and heat energies

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

58

Success Stories: Solexant Nanocrystal Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Rolling Out Affordable Solar Energy The high cost of producing photovoltaic cells has been cited as the main obstacle in expanding solar energy's reach. Lawrence Berkeley National...

59

Solar cells with a twist Comments ( 35)  

E-Print Network (OSTI)

Solar cells with a twist Article Comments ( 35) JULIE STEENHUYSEN REUTERS OCTOBER 7, 2008 AT 9:58 AM EDT CHICAGO -- U.S. researchers have found a way to make efficient silicon-based solar cells of buildings as opportunities for solar energy," Prof. Rogers said in a telephone interview. Solar cells, which

Rogers, John A.

60

Nanocrystal Solar Cells  

E-Print Network (OSTI)

research on organic photovoltaic cells since small molecule10 years prior (4). Photovoltaic cells with an active layerof the associated photovoltaic cells. 2.4 Charge transport

Gur, Ilan

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Fabrication and Characterization of Organic Solar Cells  

E-Print Network (OSTI)

5 Figure 1-3 The Solar Spectrum at the Top of thesolar cells. Figure 1-3 The Solar Spectrum at the Top of thenarrow range of solar spectrum, as they are commonly known

Yengel, Emre

2010-01-01T23:59:59.000Z

62

Organic Solar Cells: Absolute Measurement of Domain Composition...  

NLE Websites -- All DOE Office Websites (Extended Search)

Organic Solar Cells: Absolute Measurement of Domain Composition and Nanoscale Size Distribution Explains Performance in Solar Cells Organic Solar Cells: Absolute Measurement of...

63

Silicon concentrator solar cell research  

DOE Green Energy (OSTI)

This report describes work conducted between December 1990 and May 1992 continuing research on silicon concentrator solar cells. The objectives of the work were to improve the performance of high-efficiency cells upon p-type substrates, to investigate the ultraviolet stability of such cells, to develop concentrator cells based on n-type substrates, and to transfer technology to appropriate commercial environments. Key results include the identification of contact resistance between boron-defused areas and rear aluminum as the source of anomalously large series resistance in both p- and n-type cells. A major achievement of the present project was the successful transfer of cell technology to both Applied Solar Energy Corporation and Solarex Corporation.

Green, M.A.; Zhao, J.; Wang, A.; Dai, X.; Milne, A.; Cai, S.; Aberle, A.; Wenham, S.R. [Univ. of New South Wales, Kensington, NSW (AU). Centre for Photovoltaic Devices and Systems

1993-06-01T23:59:59.000Z

64

Definition: Solar cell | Open Energy Information  

Open Energy Info (EERE)

cell cell Jump to: navigation, search Dictionary.png Solar cell Converts light into electrical energy. Traditional solar cells are made from silicon; second-generation solar cells (thin-film solar cells) are made from amorphous silicon or nonsilicon materials such as cadmium telluride; and third-generation solar cells are being made from variety of new materials, including solar inks, solar dyes, and conductive plastics.[1][2] View on Wikipedia Wikipedia Definition A solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect. It is a form of photoelectric cell (in that its electrical characteristics-e.g. current, voltage, or resistance-vary when light is incident upon it) which, when exposed to light, can generate

65

Development of concentrator solar cells  

DOE Green Energy (OSTI)

A limited pilot production run on PESC silicon solar cells for use at high concentrations (200 to 400 suns) is summarized. The front contact design of the cells was modified for operation without prismatic covers. The original objective of the contract was to systematically complete a process consolidation phase, in which all the, process improvements developed during the contract would be combined in a pilot production run. This pilot run was going to provide, a basis for estimating cell costs when produced at high throughput. Because of DOE funding limitations, the Photovoltaic Concentrator Initiative is on hold, and Applied Solar`s contract was operated at a low level of effort for most of 1993. The results obtained from the reduced scope pilot run showed the effects of discontinuous process optimization and characterization. However, the run provided valuable insight into the technical areas that can be optimized to achieve the original goals of the contract.

Not Available

1994-08-01T23:59:59.000Z

66

TUTORIALS: Semiconductors & Electroceramics - Solar cell ... - TMS  

Science Conference Proceedings (OSTI)

Jan 21, 2008 ... This tutorial introduces the operation of p-n junction solar cells, discusses the CdS/CdTe solar cell in detail, and describes several deposition...

67

Biomimetic Dye Molecules for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce...

68

Cermet layer for amorphous silicon solar cells  

DOE Patents (OSTI)

A transparent high work function metal cermet forms a Schottky barrier in a Schottky barrier amorphous silicon solar cell and adheres well to the P+ layer in a PIN amorphous silicon solar cell.

Hanak, Joseph J. (Lawrenceville, NJ)

1979-01-01T23:59:59.000Z

69

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 05 · P-N Junction 1Montana State University: Solar Cells Lecture 5: P-N Junction P-N Junction · Solar Cell is a large area P-N junction electron (hole) positive) 2Montana State University: Solar Cells Lecture 5: P-N Junction p-n Junction p n P

Kaiser, Todd J.

70

Process of making solar cell module  

DOE Patents (OSTI)

A process is presented for the manufacture of solar cell modules. A solution comprising a highly plasticized polyvinyl butyral is applied to a solar cell array. The coated array is dried and sandwiched between at last two sheets of polyvinyl butyral and at least two sheets of a rigid transparent member. The sandwich is laminated by the application of heat and pressure to cause fusion and bonding of the solar cell array with the rigid transparent members to produce a solar cell module.

Packer, M.; Coyle, P.J.

1981-03-09T23:59:59.000Z

71

Solar Cell Silicon - Programmaster.org  

Science Conference Proceedings (OSTI)

Jul 31, 2012 ... About this Symposium. Meeting, 2013 TMS Annual Meeting & Exhibition. Symposium, Solar Cell Silicon. Sponsorship, TMS Extraction and...

72

Improving the design of solar cells  

Science Conference Proceedings (OSTI)

Improving the design of solar cells. Photovoltaic (PV) systems convert the sun's light directly to electrical power by absorption ...

2012-10-02T23:59:59.000Z

73

Electron-Beam Irradiation of Solar Cells  

Science Conference Proceedings (OSTI)

Electron-Beam Irradiation of Solar Cells. Summary: The Dosimetry Group operates a system capable of performing electron ...

2013-02-27T23:59:59.000Z

74

Key Physical Mechanisms in Nanostructured Solar Cells  

DOE Green Energy (OSTI)

The objective of the project was to study both theoretically and experimentally the excitation, recombination and transport properties required for nanostructured solar cells to deliver energy conversion efficiencies well in excess of conventional limits. These objectives were met by concentrating on three key areas, namely, investigation of physical mechanisms present in nanostructured solar cells, characterization of loss mechanisms in nanostructured solar cells and determining the properties required of nanostructured solar cells in order to achieve high efficiency and the design implications.

Dr Stephan Bremner

2010-07-21T23:59:59.000Z

75

Compensated amorphous silicon solar cell  

DOE Patents (OSTI)

An amorphous silicon solar cell incorporates a region of intrinsic hydrogenated amorphous silicon fabricated by a glow discharge wherein said intrinsic region is compensated by P-type dopants in an amount sufficient to reduce the space charge density of said region under illumination to about zero.

Carlson, David E. (Yardley, PA)

1980-01-01T23:59:59.000Z

76

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 02 Microfabrication ­ A combination · Photolithograpy · Depostion · Etching 1 Montana State University: Solar Cells Lecture 2: Microfabrication Flow Montana State University: Solar Cells Lecture 2: Microfabrication Questions · What is heat? · Heat

Kaiser, Todd J.

77

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 07 · EE Fundamentals 1Montana State University: Solar Cells Lecture 7: EE Fundamentals What is Electrical Engineering · Opposite of lightning · Symbolic information: electronics Montana State University: Solar Cells Lecture 7: EE Fundamentals 2 Review

Kaiser, Todd J.

78

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 03 · Nature of Sunlight 1Montana State University: Solar Cells Lecture 3: Nature of Sunlight Wave-Particle Duality · Light acts as ­ Waves University: Solar Cells Lecture 3: Nature of Sunlight Properties of Light · Sunlight contains photons of many

Kaiser, Todd J.

79

EE580 Solar Cells Todd J. Kaiser  

E-Print Network (OSTI)

7/21/2010 1 EE580 ­ Solar Cells Todd J. Kaiser · Lecture 04 · Semiconductor Materials · Chapter 1 1Montana State University: Solar Cells Lecture 4: Semiconductor Materials Semiconductor Bond Model · Bohr electrons interact to form bonds 2Montana State University: Solar Cells Lecture 4: Semiconductor Materials

Kaiser, Todd J.

80

Alloys and Compounds for Thermoelectric and Solar Cell Applications  

Science Conference Proceedings (OSTI)

Alloys and Compounds for Thermoelectric and Solar Cell Applications II: Alloys and Compounds for Thermoelectric and Solar Cell Applications: Thermoelectric...

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Diffraction: Enhanced Light Absorption of Solar Cells and ...  

Solar and Renewable Energy Photovoltaic Thin-film Solar Cells Space Solar Cells Polarization-Dependent Photodetectors BENEFITS Improved performance of

82

Mixed ternary heterojunction solar cell  

SciTech Connect

A thin film heterojunction solar cell and a method of making it has a p-type layer of mixed ternary I-III-VI.sub.2 semiconductor material in contact with an n-type layer of mixed binary II-VI semiconductor material. The p-type semiconductor material includes a low resistivity copper-rich region adjacent the back metal contact of the cell and a composition gradient providing a minority carrier mirror that improves the photovoltaic performance of the cell. The p-type semiconductor material preferably is CuInGaSe.sub.2 or CuIn(SSe).sub.2.

Chen, Wen S. (Seattle, WA); Stewart, John M. (Seattle, WA)

1992-08-25T23:59:59.000Z

83

Solar cell emulator and solar cell characteristics measurements in dark and illuminated conditions  

Science Conference Proceedings (OSTI)

This paper describes a novel data acquisition system designed and implemented with facilities for measuring and monitoring the characteristics of a PV solar cell, module and/or system. The functioning of the equipment is based on the so-called virtual ... Keywords: AVR microcontroller, I-V curve measurements, LabVIEW, solar cell emulator, solar cells & solar array

Yousry Atia; Mohamed Zahran; Abdullah Al-Hossain

2011-04-01T23:59:59.000Z

84

Solar cells Improved Hybrid Solar Cells via in situ UV Polymerization  

E-Print Network (OSTI)

Solar cells Improved Hybrid Solar Cells via in situ UV Polymerization Sanja Tepavcevic, Seth B-enhanced solar energy conversion. By using this simple in situ UV polymerization method that couples mobility of the photoactive layer can be enhanced. 1. Introduction Hybrid solar cells have been developed

Sibener, Steven

85

Solar Energy Materials & Solar Cells 91 (2007) 15991610 Improving solar cell efficiency using photonic band-gap materials  

E-Print Network (OSTI)

Solar Energy Materials & Solar Cells 91 (2007) 1599­1610 Improving solar cell efficiency using Propulsion Laboratory, California Institute of Technology, Mail Stop T1714 106, 4800 Oak Grove Drive and reliable solar-cell devices is presented. We show that due their ability to modify the spectral and angular

Dowling, Jonathan P.

86

Compensated amorphous silicon solar cell  

SciTech Connect

An amorphous silicon solar cell including an electrically conductive substrate, a layer of glow discharge deposited hydrogenated amorphous silicon over said substrate and having regions of differing conductivity with at least one region of intrinsic hydrogenated amorphous silicon. The layer of hydrogenated amorphous silicon has opposed first and second major surfaces where the first major surface contacts the electrically conductive substrate and an electrode for electrically contacting the second major surface. The intrinsic hydrogenated amorphous silicon region is deposited in a glow discharge with an atmosphere which includes not less than about 0.02 atom percent mono-atomic boron. An improved N.I.P. solar cell is disclosed using a BF.sub.3 doped intrinsic layer.

Devaud, Genevieve (629 S. Humphrey Ave., Oak Park, IL 60304)

1983-01-01T23:59:59.000Z

87

Spectral sensitization of nanocrystalline solar cells  

DOE Patents (OSTI)

This invention relates to dye sensitized polycrystalline photoelectrochemical solar cells for use in energy transduction from light to electricity. It concerns the utility of highly absorbing organic chromophores as sensitizers in such cells and the degree to which they may be utilized alone and in combination to produce an efficient photoelectrochemical cell, e.g., a regenerative solar cell.

Spitler, Mark T. (Concord, MA); Ehret, Anne (Malden, MA); Stuhl, Louis S. (Bedford, MA)

2002-01-01T23:59:59.000Z

88

Three-junction solar cell  

SciTech Connect

A photovoltaic solar cell is formed in a monolithic semiconductor. The cell contains three junctions. In sequence from the light-entering face, the junctions have a high, a medium, and a low energy gap. The lower junctions are connected in series by one or more metallic members connecting the top of the lower junction through apertures to the bottom of the middle junction. The upper junction is connected in voltage opposition to the lower and middle junctions by second metallic electrodes deposited in holes 60 through the upper junction. The second electrodes are connected to an external terminal.

Ludowise, Michael J. (Cupertino, CA)

1986-01-01T23:59:59.000Z

89

VISUALS: Photovoltaic Solar Cells Close-Up  

Science Conference Proceedings (OSTI)

Jan 10, 2008 ... This site contains very close-up static and portrait shots of photovoltaic solar cells and cell arrays. Two cell types are shown: A silver and gray...

90

Immersion Cooling of Photovoltaic Cells in Highly Concentrated Solar Beams.  

E-Print Network (OSTI)

??Concentrated solar radiation can be utilized to generate electrical power from photovoltaic cells, but concentrated solar radiation increases the photovoltaic cells temperature. This increase in (more)

Darwish, Ahmed

2011-01-01T23:59:59.000Z

91

Solar Cell Modules With Improved Backskin  

SciTech Connect

A laminated solar cell module comprises a front light transmitting support, a plurality of interconnected solar cells encapsulated by a light-transmitting encapsulant material, and an improved backskin formed of an ionomer/nylon alloy. The improved backskin has a toughness and melting point temperature sufficiently great to avoid any likelihood of it being pierced by any of the components that interconnect the solar cells.

Gonsiorawski, Ronald C. (Danvers, MA)

2003-12-09T23:59:59.000Z

92

Bypass diode for a solar cell  

SciTech Connect

Bypass diodes for solar cells are described. In one embodiment, a bypass diode for a solar cell includes a substrate of the solar cell. A first conductive region is disposed above the substrate, the first conductive region of a first conductivity type. A second conductive region is disposed on the first conductive region, the second conductive region of a second conductivity type opposite the first conductivity type.

Rim, Seung Bum (Palo Alto, CA); Kim, Taeseok (San Jose, CA); Smith, David D. (Campbell, CA); Cousins, Peter J. (Menlo Park, CA)

2012-03-13T23:59:59.000Z

93

Economical Pyrite-Based Solar Cells  

compete with fossil fuels (payback time of about 5-7 years). The second generation of solar cells focuses on low production costs using thin film cells, which resulted in much lower efficiency rates. The third generation of solar cells has not yet ...

94

Magnetically Guided Shaping for Solar Cell Silicon Applications  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , Solar Cell Silicon. Presentation Title, Magnetically Guided Shaping for Solar...

95

Highly Efficient Multigap Solar Cell Materials  

Scientists at Berkeley Lab have invented multiband gap semiconducting materials for developing solar cells that could achieve power conversion efficiencies of 50 percent or higher.

96

The Quest for Inexpensive Silicon Solar Cells  

To learn more about NREL's silicon solar cell research, visit the Silicon Materials and Devices Web site. Did you find what you needed? Yes No. Thank ...

97

Efficient Polymer Solar Cells - Energy Innovation Portal  

Ames Laboratory researchers have developed a process for producing more efficient polymer solar cells by increasing light absorption through a thin ...

98

Electrical Modeling of Polymer Solar Cell  

Science Conference Proceedings (OSTI)

A numerical model to predict the current-voltage curves of bilayer polymer solar cell. The model includes drift and diffusion currents, injection and extraction at...

99

Improved monolithic tandem solar cell  

DOE Patents (OSTI)

A single-crystal, monolithic, tandem, photovoltaic solar cell is described which includes (a) an InP substrate having upper and lower surfaces, (b) a first photoactive subcell on the upper surf ace of the InP substrate, (c) a second photoactive subcell on the first subcell; and (d) an optically transparent prismatic cover layer over the second subcell. The first photoactive subcell is GaInAsP of defined composition. The second subcell is InP. The two subcells are lattice matched.

Wanlass, M.W.

1991-04-23T23:59:59.000Z

100

Front contact solar cell with formed emitter  

SciTech Connect

A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

Cousins, Peter John (Menlo Park, CA)

2012-07-17T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Method for processing silicon solar cells  

DOE Patents (OSTI)

The instant invention teaches a novel method for fabricating silicon solar cells utilizing concentrated solar radiation. The solar radiation is concentrated by use of a solar furnace which is used to form a front surface junction and back-surface field in one processing step. The present invention also provides a method of making multicrystalline silicon from amorphous silicon. The invention also teaches a method of texturing the surface of a wafer by forming a porous silicon layer on the surface of a silicon substrate and a method of gettering impurities. Also contemplated by the invention are methods of surface passivation, forming novel solar cell structures, and hydrogen passivation. 2 figs.

Tsuo, Y.S.; Landry, M.D.; Pitts, J.R.

1997-05-06T23:59:59.000Z

102

Method for processing silicon solar cells  

DOE Patents (OSTI)

The instant invention teaches a novel method for fabricating silicon solar cells utilizing concentrated solar radiation. The solar radiation is concentrated by use of a solar furnace which is used to form a front surface junction and back-surface field in one processing step. The present invention also provides a method of making multicrystallline silicon from amorphous silicon. The invention also teaches a method of texturing the surface of a wafer by forming a porous silicon layer on the surface of a silicon substrate and a method of gettering impurities. Also contemplated by the invention are methods of surface passivation, forming novel solar cell structures, and hydrogen passivation.

Tsuo, Y. Simon (Golden, CO); Landry, Marc D. (Lafayette, CO); Pitts, John R. (Lakewood, CO)

1997-01-01T23:59:59.000Z

103

Current and lattice matched tandem solar cell  

DOE Patents (OSTI)

A multijunction (cascade) tandem photovoltaic solar cell device is fabricated of a Ga.sub.x In.sub.1-x P (0.505.ltoreq.X.ltoreq.0.515) top cell semiconductor lattice matched to a GaAs bottom cell semiconductor at a low-resistance heterojunction, preferably a p+/n+ heterojunction between the cells. The top and bottom cells are both lattice matched and current matched for high efficiency solar radiation conversion to electrical energy.

Olson, Jerry M. (Lakewood, CO)

1987-01-01T23:59:59.000Z

104

Amorphous silicon solar cell allowing infrared transmission  

DOE Patents (OSTI)

An amorphous silicon solar cell with a layer of high index of refraction material or a series of layers having high and low indices of refraction material deposited upon a transparent substrate to reflect light of energies greater than the bandgap energy of the amorphous silicon back into the solar cell and transmit solar radiation having an energy less than the bandgap energy of the amorphous silicon.

Carlson, David E. (Yardley, PA)

1979-01-01T23:59:59.000Z

105

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network (OSTI)

of the intermediate band solar cell under nonideal spaceefficient InGaP/GaAs tandem solar cells, Appl. Phys. Lett.band impact ionization and solar cell efficiency, J. Appl.

Shao, Qinghui

2009-01-01T23:59:59.000Z

106

CRADA Final Report: Process development for hybrid solar cells  

E-Print Network (OSTI)

development for hybrid solar cells Summary of the specific20 wafers with full tandem solar cell test structure perIIINitride/Silicon Tandem Solar Cell, Appl. Phys. Express

Ager, Joel W

2011-01-01T23:59:59.000Z

107

Si concentrator solar cell development. [Final report  

DOE Green Energy (OSTI)

This is the final report of a program to develop a commercial, high-efficiency, low-cost concentrator solar cell compatible with Spectrolab`s existing manufacturing infrastructure for space solar cells. The period covered is between 1991 and 1993. The program was funded through Sandia National Laboratories through the DOE concentrator initiative and, was also cost shared by Spectrolab. As a result of this program, Spectrolab implemented solar cells achieving an efficiency of over 19% at 200 to 300X concentration. The cells are compatible with DOE guidelines for a cell price necessary to achieve a cost of electricity of 12 cents a kilowatthour.

Krut, D.D. [Spectrolab, Inc., Sylmar, CA (United States)

1994-10-01T23:59:59.000Z

108

Enabling Thin Silicon Solar Cell Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Enabling Thin Silicon Solar Cell Enabling Thin Silicon Solar Cell Technology Enabling Thin Silicon Solar Cell Technology Print Friday, 21 June 2013 10:49 Generic silicon solar cells showing +45°, -45°, and dendritic crack patterns. The effort to shift U.S. energy reliance from fossil fuels to renewable sources has spurred companies to reduce the cost and increase the reliability of their solar photovoltaics (SPVs). The use of thinner silicon in SPV technologies is being widely adopted because it significantly reduces costs; however, silicon is brittle, and thinner silicon, coupled with other recent trends in SPV technologies (thinner glass, lighter or no metal frames, increased use of certain polymers for encapsulation of the silicon cells), is more susceptible to stress and cracking. When the thin

109

Nanowire-based All Oxide Solar Cells  

Science Conference Proceedings (OSTI)

We present an all-oxide solar cell fabricated from vertically oriented zinc oxide nanowires and cuprous oxide nanoparticles. Our solar cell consists of vertically oriented n-type zinc oxide nanowires, surrounded by a film constructed from p-type cuprous oxide nanoparticles. Our solution-based synthesis of inexpensive and environmentally benign oxide materials in a solar cell would allow for the facile production of large-scale photovoltaic devices. We found that the solar cell performance is enhanced with the addition of an intermediate oxide insulating layer between the nanowires and the nanoparticles. This observation of the important dependence of the shunt resistance on the photovoltaic performance is widely applicable to any nanowire solar cell constructed with the nanowire array in direct contact with one electrode.

Yang*, Benjamin D. Yuhas and Peidong; Yang, Peidong

2008-12-07T23:59:59.000Z

110

Controlled Structure of Organic-Nanomaterial Solar Cells - Energy ...  

Technology Marketing Summary Organic, polymer-based solar cellslightweight alternatives to conventional, silicon-based solar cellshave great potential for ...

111

New Morphological Paradigm Uncovered in Organic Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive...

112

Potential of Silicon Solar Cells from Metallurgical Process Route  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2013 TMS Annual Meeting & Exhibition. Symposium , Solar Cell Silicon. Presentation Title, Potential of Silicon Solar Cells from...

113

Alloys and Compounds for Thermoelectric and Solar Cell Applications  

Science Conference Proceedings (OSTI)

Alloys and Compounds for Thermoelectric and Solar Cell Applications II: Alloys and Compounds for Thermoelectric and Solar Cell Applications: Thermoelectric I

114

Techniques of Nanoscale Silicon Texturing of Solar Cells ...  

Patent 6,329,296: Metal catalyst technique for texturing silicon solar cells Textured silicon solar cells and techniques for their manufacture ...

115

Hybrid Solar Cells via UV-Polymerization of Polymer Precursor  

AVAIL ABLE FOR L ICENSING New fabrication method results in high-performing solar cells The Invention A method to create improved hybrid solar cells through the ...

116

Improved Dye-Sensitized Solar Cell (DSSC) for Higher Energy ...  

solar cells to potentially compete with fossil fuels. Improved Dye-Sensitized Solar Cell (DSSC) for Higher Energy Conversion Efficiency Page 1 of 1 Data Update

117

Biomimetic Dye Molecules for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

118

Biomimetic Dye Molecules for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

119

Biomimetic Dye Molecules for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

120

Biomimetic Dye Molecules for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Biomimetic Dye Molecules for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

122

Biomimetic Dye Molecules for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomimetic Dye Molecules for Solar Cells Print Biomimetic Dye Molecules for Solar Cells Print Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, they are currently too costly to compete with traditional (polluting) energy sources. The most cost-effective solar cells are not high-end, high-efficiency single-crystal devices, but rather low-end cells based on organic molecules or conducting polymers. Vital information for making organic solar cells more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant energy levels of biomimetic dye molecules were mapped out systematically by determining their unoccupied molecular orbitals and their orientation. Organic molecules in dye-sensitized solar cells exhibit great potential to increase the efficiency and reduce the cost of photovoltaic power generation by allowing a wide variety of chemical modifications and combinations with inorganic nanocrystals.

123

Potential for PV Solar Cells  

Science Conference Proceedings (OSTI)

Symposium, Energy Conversion Photovoltaic, Concentrating Solar Power, and Thermoelectric. Presentation Title, Columnar p-n Heterostructures Formed by a...

124

SunShot Initiative: Dye-Sensitized Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Dye-Sensitized Solar Cells to Dye-Sensitized Solar Cells to someone by E-mail Share SunShot Initiative: Dye-Sensitized Solar Cells on Facebook Tweet about SunShot Initiative: Dye-Sensitized Solar Cells on Twitter Bookmark SunShot Initiative: Dye-Sensitized Solar Cells on Google Bookmark SunShot Initiative: Dye-Sensitized Solar Cells on Delicious Rank SunShot Initiative: Dye-Sensitized Solar Cells on Digg Find More places to share SunShot Initiative: Dye-Sensitized Solar Cells on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Crystalline Silicon Thin Films Multijunctions Organic Photovoltaics Dye-Sensitized Solar Cells Competitive Awards Systems Integration Balance of Systems Dye-Sensitized Solar Cells Graphic showing the seven layers of a dye-sensitized PV cell: electrode, hole conductor, dope, TiO2, blocking layer, transparent conductive oxide, and glass.

125

Heterojunction solar cell with passivated emitter surface  

DOE Patents (OSTI)

A high-efficiency heterojunction solar cell is described wherein a thin emitter layer (preferably Ga[sub 0.52]In[sub 0.48]P) forms a heterojunction with a GaAs absorber layer. A passivating window layer of defined composition is disposed over the emitter layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the window layer. 1 fig.

Olson, J.M.; Kurtz, S.R.

1994-05-31T23:59:59.000Z

126

Heterojunction solar cell with passivated emitter surface  

DOE Patents (OSTI)

A high-efficiency heterojunction solar cell wherein a thin emitter layer (preferably Ga.sub.0.52 In.sub.0.48 P) forms a heterojunction with a GaAs absorber layer. A passivating window layer of defined composition is disposed over the emitter layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the window layer.

Olson, Jerry M. (Lakewood, CO); Kurtz, Sarah R. (Golden, CO)

1994-01-01T23:59:59.000Z

127

Process monitoring in solar cell manufacturing  

DOE Green Energy (OSTI)

In this paper, the authors describe a new method that is capable of on-line monitoring of several solar cell process steps such as texturing, AR coatings, and metal contact properties. The measurement technique is rapid and specifically designed for solar cells and wafers. The system implementing this new concept is named ''PV Reflectometer.'' The idea was originally conceived several years ago and the principle of the method has been demonstrated for some simple cases. Recently, this method has been improved to be more suitable for commercial applications. For completeness, the paper first includes a brief review of the process control requirements and the common monitoring methods in solar cell production.

Sopori, B.; Zhang, Y.; Chen, W.

1999-10-26T23:59:59.000Z

128

LQ Energy LDK Solar Q Cells JV | Open Energy Information  

Open Energy Info (EERE)

LQ Energy LDK Solar Q Cells JV Jump to: navigation, search Name LQ Energy (LDK Solar & Q-Cells JV) Place Saxony-Anhalt, Germany Sector Solar Product Germany-based JV between LDK...

129

Indium oxide/n-silicon heterojunction solar cells  

DOE Patents (OSTI)

A high photo-conversion efficiency indium oxide/n-silicon heterojunction solar cell is spray deposited from a solution containing indium trichloride. The solar cell exhibits an Air Mass One solar conversion efficiency in excess of about 10%.

Feng, Tom (Morris Plains, NJ); Ghosh, Amal K. (New Providence, NJ)

1982-12-28T23:59:59.000Z

130

Tianjin Jinneng Solar Cell Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Municipality, China Zip 300384 Sector Solar Product Chinese manufacturer of a-si Tandem thin-film solar cells and PV system integrator. References Tianjin Jinneng Solar Cell Co...

131

Solar powered unitized regenerative fuel cell system  

Science Conference Proceedings (OSTI)

Solar hydrogen system is a unique power system that can meet the power requirement for the energy future demand, in such a system the hydrogen used to be the energy carrier which can produced through electrolysis by using the power from the PV during ... Keywords: electrolyzer, fuel cell, hydrogen, photovoltaic, regenerative, solar hydrogen system

Salwan S. Dihrab; , Kamaruzzaman Sopian; Nowshad Amin; M. M. Alghoul; Azami Zaharim

2008-02-01T23:59:59.000Z

132

Solar cell with a gallium nitride electrode  

DOE Patents (OSTI)

A solar cell which comprises a body of silicon having a P-N junction therein with a transparent conducting N-type gallium nitride layer as an ohmic contact on the N-type side of the semiconductor exposed to solar radiation.

Pankove, Jacques I. (Princeton, NJ)

1979-01-01T23:59:59.000Z

133

Cascade solar cell having conductive interconnects  

SciTech Connect

Direct ohmic contact between the cells in an epitaxially grown cascade solar cell is obtained by means of conductive interconnects formed through grooves etched intermittently in the upper cell. The base of the upper cell is directly connected by the conductive interconnects to the emitter of the bottom cell. The conductive interconnects preferably terminate on a ledge formed in the base of the upper cell.

Borden, Peter G. (Menlo Park, CA); Saxena, Ram R. (Saratoga, CA)

1982-10-26T23:59:59.000Z

134

Organic-Based ("Excitonic") Solar Cells  

Science Conference Proceedings (OSTI)

The existing types of organic-based solar cells, including dye-sensitized solar cells (DSSCs), can be categorized by their photoconversion mechanism as excitonic solar cells, XSCs. Their distinguishing characteristic is that charge generation and separation are simultaneous and this occurs via exciton dissociation at a heterointerface. Electrons are photogenerated on one side of the interface and holes on the other. This results in fundamental differences between XSCs and conventional PV cells. For example, the open circuit photovoltage, Voc, in conventional cells is limited to less than the magnitude of the band bending, bi; however, Voc in XSCs is commonly greater than bi. A general theoretical description is employed to quantify the differences between conventional and excitonic cells. The key difference is the dominant importance, in XSCs, of the photoinduced chemical potential energy gradient, ..delta..hn, whereas ..delta..hn is unimportant, and therefore neglected, in theoretical descriptions of conventional PV cells. Several examples are provided.

Gregg. B.A.

2003-05-01T23:59:59.000Z

135

Process for Fabrication of Efficient Solar Cells - Energy ...  

Ames Laboratory researchers have developed a process for fabrication of solar cells with increased efficiency.

136

High Aspect Ratio Semiconductor Heterojunction Solar Cells  

E-Print Network (OSTI)

High Aspect Ratio Semiconductor Heterojunction Solar Cells Haoting Shen Prof. Redwing's Research and in-situ dopant for Si nanowires Y. Ke, X.J. Weng, J.M. Redwing, C.M. Eichfeld, T.R. Swisher, S

Yener, Aylin

137

Texturization of multicrystalline silicon solar cells  

E-Print Network (OSTI)

A significant efficiency gain for crystalline silicon solar cells can be achieved by surface texturization. This research was directed at developing a low-cost, high-throughput and reliable texturing method that can create ...

Li, Dai-Yin

2010-01-01T23:59:59.000Z

138

Solar Cell Efficiency Tables (Version 39)  

Science Conference Proceedings (OSTI)

Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined, and new entries since July 2011 are reviewed.

Green, M. A.; Emery, K.; Hishikawa, Y.; Warta, W.; Dunlop, E. D.

2012-01-01T23:59:59.000Z

139

Dye-sensitized solar cells  

DOE Patents (OSTI)

A low-cost dye-sensitized Schottky barrier solar cell is comprised of a substrate of semiconductor with an ohmic contact on one face, a sensitizing dye adsorbed onto the opposite face of the semiconductor, a transparent thin-film layer of a reducing agent over the dye, and a thin-film layer of metal over the reducing agent. The ohmic contact and metal layer constitute electrodes for connection to an external circuit and one or the other or both are made transparent to permit light to penetrate to the dye and be absorbed therein for generating electric current. The semiconductor material chosen to be the substrate is one having a wide bandgap and which therefore is transparent; the dye selected is one having a ground state within the bandgap of the semiconductor to generate carriers in the semiconductor, and a first excited state above the conduction band edge of the semiconductor to readily conduct electrons from the dye to the semiconductor; the reducing agent selected is one having a ground state above the ground state of the sensitizer to provide a plentiful source of electrons to the dye during current generation and thereby enhance the generation; and the metal for the thin-film layer of metal is selected to have a Fermi level in the vicinity of or above the ground state of the reducing agent to thereby amply supply electrons to the reducing agent. 3 figs.

Skotheim, T.A.

1980-03-04T23:59:59.000Z

140

Dye-sensitized solar cells  

DOE Patents (OSTI)

A low-cost dye-sensitized Schottky barrier solar cell comprised of a substrate of semiconductor with an ohmic contact on one face, a sensitizing dye adsorbed onto the opposite face of the semiconductor, a transparent thin-film layer of a reducing agent over the dye, and a thin-film layer of metal over the reducing agent. The ohmic contact and metal layer constitute electrodes for connection to an external circuit and one or the other or both are made transparent to permit light to penetrate to the dye and be absorbed therein for generating electric current. The semiconductor material chosen to be the substrate is one having a wide bandgap and which therefore is transparent; the dye selected is one having a ground state within the bandgap of the semiconductor to generate carriers in the semiconductor, and a first excited state above the conduction band edge of the semiconductor to readily conduct electrons from the dye to the semiconductor; the reducing agent selected is one having a ground state above the ground state of the sensitizer to provide a plentiful source of electrons to the dye during current generation and thereby enhance the generation; and the metal for the thin-film layer of metal is selected to have a Fermi level in the vicinity of or above the ground state of the reducing agent to thereby amply supply electrons to the reducing agent.

Skotheim, Terje A. (Berkeley, CA)

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Cheaper Silicon Found Effective for Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Cheaper Silicon Found Effective for Solar Cells Cheaper Silicon Found Effective for Solar Cells A research team from the University of California at Berkeley, Lawrence Berkeley National Laboratory, Argonne National Laboratory, and Pacific Northwest National Laboratory, using U.S. Department of Energy (DOE) synchrotron light sources, has successfully shown that inexpensive silicon has the potential to be used for photovoltaic (PV) devices, commonly known as solar cells. In a new approach-whose findings were published online in Nature Materials (August 14, 2005)-the researchers used nanodefect engineering to control transition metal contamination in order to produce impurity-rich, performance-enhanced multicrystalline silicon (mc-Si) material. "Solar energy is often touted as the most promising and secure energy

142

Nanoparticle Solar Cell Final Technical Report  

DOE Green Energy (OSTI)

The purpose of this work was to demonstrate all-inorganic nanoparticle-based solar cells with photovoltaic performance extending into the near-IR region of the solar spectrum as a pathway towards improving power conversion efficiencies. The field of all-inorganic nanoparticle-based solar cells is very new, with only one literature publication in the prior to our project. Very little is understood regarding how these devices function. Inorganic solar cells with IR performance have previously been fabricated using traditional methods such as physical vapor deposition and sputtering, and solution-processed devices utilizing IR-absorbing organic polymers have been investigated. The solution-based deposition of nanoparticles offers the potential of a low-cost manufacturing process combined with the ability to tune the chemical synthesis and material properties to control the device properties. This work, in collaboration with the Sue Carter research group at the University of California, Santa Cruz, has greatly expanded the knowledge base in this field, exploring multiple material systems and several key areas of device physics including temperature, bandgap and electrode device behavior dependence, material morphological behavior, and the role of buffer layers. One publication has been accepted to Solar Energy Materials and Solar Cells pending minor revision and another two papers are being written now. While device performance in the near-IR did not reach the level anticipated at the beginning of this grant, we did observe one of the highest near-IR efficiencies for a nanoparticle-based solar cell device to date. We also identified several key parameters of importance for improving both near-IR performance and nanoparticle solar cells in general, and demonstrated multiple pathways which showed promise for future commercialization with further research.

Breeze, Alison, J; Sahoo, Yudhisthira; Reddy, Damoder; Sholin, Veronica; Carter, Sue

2008-06-17T23:59:59.000Z

143

Improved Dye-Sensitized Solar Cell (DSSC) for Higher Energy ...  

A University of Colorado research group led by Rich Noble has developed a novel approach to dye-sensitized solar cells that increases solar-to-electrical energy ...

144

Scientists Identify New Quaternary Materials for Solar Cell Absorbers...  

NLE Websites -- All DOE Office Websites (Extended Search)

insight for exploring use of Earth- abundant quaternary semiconductors for large-scale solar cell applications. For large-scale solar electricity generation, it is critical to...

145

Stress and Fracture of Silicon Solar Cells as Revealed by ...  

Science Conference Proceedings (OSTI)

Presentation Title, Stress and Fracture of Silicon Solar Cells as Revealed by ... thinner and thinner silicon in the solar photovoltaic (PV) technologies due to the...

146

NANOCOMPOSITE ENABLED SENSITIZED SOLAR CELL  

E-Print Network (OSTI)

by Dye-Sensitized Photovoltaic cells. Inorganic Chemistry,by Dye-Sensitized Photovoltaic Cells. Inorganic ChemistryThe characteristics of a photovoltaic cell. Generally,

Phuyal, Dibya

2012-01-01T23:59:59.000Z

147

Plastic Schottky-barrier solar cells  

DOE Patents (OSTI)

A photovoltaic cell structure is fabricated from an active medium including an undoped polyacetylene, organic semiconductor. When a film of such material is in rectifying contact with a metallic area electrode, a Schottky-barrier junction is obtained within the body of the cell structure. Also, a gold overlayer passivates a magnesium layer on the undoped polyacetylene film. With the proper selection and location of elements a photovoltaic cell structure and solar cell are obtained.

Waldrop, J.R.; Cohen, M.J.

1981-12-30T23:59:59.000Z

148

Low Cost, High Efficiency Tandem Silicon Solar Cells and LEDs  

iency solar cells that leverage the well-established design and manufacturing technology of silicon cells while delivering the performance previously achievable only by far more complex and expensive tandem solar cells.

149

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network (OSTI)

IBSC Tc = 300K Solar Concentration Ratio (suns) Fig. 3.25irradiation and solar cells The irradiance of the sun on thebetween Sun and Earth - is called the solar constant. The

Shao, Qinghui

2009-01-01T23:59:59.000Z

150

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network (OSTI)

to lowering the cost of solar power and hence to making itefficiency of solar panels and power to weight ratio inimprove the solar cell power conversion efficiency and it is

Shao, Qinghui

2009-01-01T23:59:59.000Z

151

High-efficiency concentrator silicon solar cells  

DOE Green Energy (OSTI)

This report presents results from extensive process development in high-efficiency Si solar cells. An advanced design for a 1.56-cm{sup 2} cell with front grids achieved 26% efficiency at 90 suns. This is especially significant since this cell does not require a prismatic cover glass. New designs for simplified backside-contact solar cells were advanced from a status of near-nonfunctionality to demonstrated 21--22% for one-sun cells in sizes up to 37.5 cm{sup 2}. An efficiency of 26% was achieved for similar 0.64-cm{sup 2} concentrator cells at 150 suns. More fundamental work on dopant-diffused regions is also presented here. The recombination vs. various process and physical parameters was studied in detail for boron and phosphorous diffusions. Emitter-design studies based solidly upon these new data indicate the performance vs design parameters for a variety of the cases of most interest to solar cell designers. Extractions of p-type bandgap narrowing and the surface recombination for p- and n-type regions from these studies have a generality that extends beyond solar cells into basic device modeling. 68 refs., 50 figs.

Sinton, R.A.; Cuevas, A.; King, R.R.; Swanson, R.M. (Stanford Univ., CA (USA). Solid-State Electronics Lab.)

1990-11-01T23:59:59.000Z

152

Method of restoring degraded solar cells  

DOE Patents (OSTI)

Amorphous silicon solar cells have been shown to have efficiencies which degrade as a result of long exposure to light. Annealing such cells in air at a temperature of about 200 C for at least 30 minutes restores their efficiency. 2 figs.

Staebler, D.L.

1983-02-01T23:59:59.000Z

153

Liquid cooled, linear focus solar cell receiver  

DOE Patents (OSTI)

Separate structures for electrical insulation and thermal conduction are established within a liquid cooled, linear focus solar cell receiver for use with parabolic or Fresnel optical concentrators. The receiver includes a V-shaped aluminum extrusion having a pair of outer faces each formed with a channel receiving a string of solar cells in thermal contact with the extrusion. Each cell string is attached to a continuous glass cover secured within the channel with spring clips to isolate the string from the external environment. Repair or replacement of solar cells is effected simply by detaching the spring clips to remove the cover/cell assembly without interrupting circulation of coolant fluid through the receiver. The lower surface of the channel in thermal contact with the cells of the string is anodized to establish a suitable standoff voltage capability between the cells and the extrusion. Primary electrical insulation is provided by a dielectric tape disposed between the coolant tube and extrusion. Adjacent solar cells are soldered to interconnect members designed to accommodate thermal expansion and mismatches. The coolant tube is clamped into the extrusion channel with a releasably attachable clamping strip to facilitate easy removal of the receiver from the coolant circuit.

Kirpich, A.S.

1983-12-08T23:59:59.000Z

154

Method of restoring degraded solar cells  

DOE Patents (OSTI)

Amorphous silicon solar cells have been shown to have efficiencies which degrade as a result of long exposure to light. Annealing such cells in air at a temperature of about 200.degree. C. for at least 30 minutes restores their efficiency.

Staebler, David L. (Lawrenceville, NJ)

1983-01-01T23:59:59.000Z

155

Accurate performance measurement of silicon solar cells  

E-Print Network (OSTI)

of the research is a testing `recipe' that uses low-cost equipment and gives an estimate of measurement is an important part of the solar cell manufacturing process. Two classes of measurement can be considered measurement ­ for cell sorting and process improvement. This work describes techniques that address both

156

Liquid cooled, linear focus solar cell receiver  

DOE Patents (OSTI)

Separate structures for electrical insulation and thermal conduction are established within a liquid cooled, linear focus solar cell receiver for use with parabolic or Fresnel optical concentrators. The receiver includes a V-shaped aluminum extrusion having a pair of outer faces each formed with a channel receiving a string of solar cells in thermal contact with the extrusion. Each cell string is attached to a continuous glass cover secured within the channel with spring clips to isolate the string from the external environment. Repair or replacement of solar cells is effected simply by detaching the spring clips to remove the cover/cell assembly without interrupting circulation of coolant fluid through the receiver. The lower surface of the channel in thermal contact with the cells of the string is anodized to establish a suitable standoff voltage capability between the cells and the extrusion. Primary electrical insulation is provided by a dielectric tape disposed between the coolant tube and extrusion. Adjacent solar cells are soldered to interconnect members designed to accommodate thermal expansion and mismatches. The coolant tube is clamped into the extrusion channel with a releasably attachable clamping strip to facilitate easy removal of the receiver from the coolant circuit.

Kirpich, Aaron S. (Broomall, PA)

1985-01-01T23:59:59.000Z

157

Method of fabricating a solar cell array  

DOE Patents (OSTI)

A first set of pre-tabbed solar cells are assembled in a predetermined array with at least part of each tab facing upward, each tab being fixed to a bonding pad on one cell and abutting a bonding pad on an adjacent cell. The cells are held in place with a first vacuum support. The array is then inverted onto a second vacuum support which holds the tabs firmly against the cell pads they abut. The cells are exposed to radiation to melt and reflow the solder pads for bonding the tab portions not already fixed to bonding pads to these pads.

Lazzery, Angelo G. (Oaklyn, NJ); Crouthamel, Marvin S. (Pennsauken, NJ); Coyle, Peter J. (Oaklyn, NJ)

1982-01-01T23:59:59.000Z

158

The Silicon Solar Cell Turns 50  

NLE Websites -- All DOE Office Websites (Extended Search)

Daryl Chapin, Calvin Fuller, and Gerald Daryl Chapin, Calvin Fuller, and Gerald Pearson likely never imagined inventing a solar cell that would revolutionize the photovoltaics industry. There wasn't even a photovoltaics industry to revolu- tionize in 1952. The three scientists were simply trying to solve problems within the Bell tele- phone system. Traditional dry cell batteries, which worked fine in mild climates, degraded too rapidly in the tropics and ceased to work when needed. The company therefore asked its famous research arm-Bell Laboratories-to explore alternative sources of freestand- ing power. Daryl Chapin got the assign- ment. At that time, his job was to test wind machines, thermoelectric gensets, and steam engines. Being a solar energy enthusiast, he suggested that the investi- gation include solar cells. His supervisor

159

High throughput solar cell ablation system  

SciTech Connect

A solar cell is formed using a solar cell ablation system. The ablation system includes a single laser source and several laser scanners. The laser scanners include a master laser scanner, with the rest of the laser scanners being slaved to the master laser scanner. A laser beam from the laser source is split into several laser beams, with the laser beams being scanned onto corresponding wafers using the laser scanners in accordance with one or more patterns. The laser beams may be scanned on the wafers using the same or different power levels of the laser source.

Harley, Gabriel; Pass, Thomas; Cousins, Peter John; Viatella, John

2012-09-11T23:59:59.000Z

160

Solar cell contact formation using laser ablation  

SciTech Connect

The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes.

Harley, Gabriel; Smith, David; Cousins, Peter

2012-12-04T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Amorphous and Microcrystalline Silicon Solar Cells: Preprint  

DOE Green Energy (OSTI)

We review the progress made by amorphous silicon solar cells, including the emerging technology of solar cells of microcrystalline silicon. The long-term trend in the efficiency of stabilized laboratory cells based on a-Si:H has been a rise of {approx}0.6 % per year. The recent trend in the a-Si,Ge:H cell efficiency alone, measured in the spectral window assigned to the bottom device in a triple-junction cell, has been an increase of {approx}0.16% per year. These improvements have brought within reach the target of 15% efficiency identified by EPRI and DOE for widespread application. Our review leads to an identification of areas of promising research, with emphasis on the fundamental science required to reach the 15% target, and then to move to the next-level efficiency goal.

Wagner, S. (Princeton University); Carlson, D. E. (Solarex); Branz, H. M. (National Renewable Energy Laboratory)

1999-04-01T23:59:59.000Z

162

Multi-junction solar cell device  

SciTech Connect

A multi-junction solar cell device (10) is provided. The multi-junction solar cell device (10) comprises either two or three active solar cells connected in series in a monolithic structure. The multi-junction device (10) comprises a bottom active cell (20) having a single-crystal silicon substrate base and an emitter layer (23). The multi-junction device (10) further comprises one or two subsequent active cells each having a base layer (32) and an emitter layer (23) with interconnecting tunnel junctions between each active cell. At least one layer that forms each of the top and middle active cells is composed of a single-crystal III-V semiconductor alloy that is substantially lattice-matched to the silicon substrate (22). The polarity of the active p-n junction cells is either p-on-n or n-on-p. The present invention further includes a method for substantially lattice matching single-crystal III-V semiconductor layers with the silicon substrate (22) by including boron and/or nitrogen in the chemical structure of these layers.

Friedman, Daniel J. (Lakewood, CO); Geisz, John F. (Wheat Ridge, CO)

2007-12-18T23:59:59.000Z

163

Flexible implementation of rigid solar cell technologies.  

Science Conference Proceedings (OSTI)

As a source of clean, remote energy, photovoltaic (PV) systems are an important area of research. The majority of solar cells are rigid materials with negligible flexibility. Flexible PV systems possess many advantages, such as being transportable and incorporable on diverse structures. Amorphous silicon and organic PV systems are flexible; however, they lack the efficiency and lifetime of rigid cells. There is also a need for PV systems that are light weight, especially in space and flight applications. We propose a solution to this problem by arranging rigid cells onto a flexible substrate creating efficient, light weight, and flexible devices. To date, we have created a working prototype of our design using the 1.1cm x 1cm Emcore cells. We have achieved a better power to weight ratio than commercially available PowerFilm{reg_sign}, which uses thin film silicon yielding .034W/gram. We have also tested our concept with other types of cells and verified that our methods are able to be adapted to any rigid solar cell technology. This allows us to use the highest efficiency devices despite their physical characteristics. Depending on the cell size we use, we can rival the curvature of most available flexible PV devices. We have shown how the benefits of rigid solar cells can be integrated into flexible applications, allowing performance that surpasses alternative technologies.

Hollowell, Andrew E.

2010-08-01T23:59:59.000Z

164

Photovoltaic nanocrystal scintillators hybridized on Si solar cells  

E-Print Network (OSTI)

Photovoltaic nanocrystal scintillators hybridized on Si solar cells for enhanced conversion on solar cells to enhance photovoltaic device parameters including spectral responsivity, open circuit@bilkent.edu.tr Abstract: We propose and demonstrate semiconductor nanocrystal based photovoltaic scintillators integrated

Demir, Hilmi Volkan

165

Harmful Shunting Mechanisms Found in Silicon Solar Cells (Fact Sheet)  

DOE Green Energy (OSTI)

Scientists developed near-field optical microscopy for imaging electrical breakdown in solar cells and identified critical electrical breakdown mechanisms operating in industrial silicon and epitaxial silicon solar cells.

Not Available

2011-05-01T23:59:59.000Z

166

Ohmic contacts for solar cells by arc plasma spraying  

DOE Patents (OSTI)

The method of applying ohmic contacts to a semiconductor, such as a silicon body or wafer used in solar cells, by the use of arc plasma spraying, and solar cells resulting therefrom.

Narasimhan, Mandayam C. (Seekonk, MA); Roessler, Barton (Barrington, RI); Loferski, Joseph J. (Providence, RI)

1982-01-01T23:59:59.000Z

167

High temperature investigations of crystalline silicon solar cell materials  

E-Print Network (OSTI)

Crystalline silicon solar cells are a promising candidate to provide a sustainable, clean energy source for the future. In order to bring about widespread adoption of solar cells, much work is needed to reduce their cost. ...

Hudelson, George David Stephen, III

2009-01-01T23:59:59.000Z

168

Next Generation Solar Cell Materials and Devices - Programmaster ...  

Science Conference Proceedings (OSTI)

Symposium, Next Generation Solar Cell Materials and Devices. Sponsorship. Organizer(s), Mark S. Goorsky, University of California, Los Angeles

169

Solar Cell Silicon: Production and Recyling - Programmaster.org  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium, Solar Cell Silicon: Production and Recyling. Sponsorship, The Minerals...

170

Alloys and Compounds for Thermoelectric and Solar Cell ...  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium, Alloys and Compounds for Thermoelectric and Solar Cell Applications II.

171

Solar Cell Technology Opportunities: Looking To a Bright ...  

Science Conference Proceedings (OSTI)

Solar Cell Technology Opportunities: Looking To a Bright, Sunny Future. From NIST Tech Beat: April 26, 2011. ...

2011-04-26T23:59:59.000Z

172

Enhanced light absorption of solar cells and photodetectors by ...  

Enhanced light absorption of solar cells and photodetectors by diffraction is described. Triangular, rectangular, and blazed subwavelength periodic structures are ...

173

Metal electrode for amorphous silicon solar cells  

DOE Patents (OSTI)

An amorphous silicon solar cell having an N-type region wherein the contact to the N-type region is composed of a material having a work function of about 3.7 electron volts or less. Suitable materials include strontium, barium and magnesium and rare earth metals such as gadolinium and yttrium.

Williams, Richard (Princeton, NJ)

1983-01-01T23:59:59.000Z

174

Tandem junction amorphous silicon solar cells  

DOE Patents (OSTI)

An amorphous silicon solar cell has an active body with two or a series of layers of hydrogenated amorphous silicon arranged in a tandem stacked configuration with one optical path and electrically interconnected by a tunnel junction. The layers of hydrogenated amorphous silicon arranged in tandem configuration can have the same bandgap or differing bandgaps.

Hanak, Joseph J. (Lawrenceville, NJ)

1981-01-01T23:59:59.000Z

175

Argonne CNM Highlight: Improved Hybrid Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Improved Hybrid Solar Cells Improved Hybrid Solar Cells inorganic-organic hybrid photovoltaic (PV) cells imade of highly ordered titanium dioxide (TiO2) nanotube arrays filled with solid organic hole conductors such as conjugated polymers One approach for making inexpensive inorganic-organic hybrid photovoltaic (PV) cells is to fill highly ordered titanium dioxide (TiO2) nanotube arrays with solid organic hole conductors such as conjugated polymers. Center for Nanoscale Materials researchers and collaborative users from the University of Chicago present a new in situ ultraviolet (UV) polymerization method for growing polythiophene inside TiO2 nanotubes and compare this method to the conventional approach of infiltrating nanotubes with presynthesized polymer. A nanotubular TiO2 substrate is immersed in a 2,5-diiodothiophene (DIT)

176

Flexible thermal cycle test equipment for concentrator solar cells  

SciTech Connect

A system and method for performing thermal stress testing of photovoltaic solar cells is presented. The system and method allows rapid testing of photovoltaic solar cells under controllable thermal conditions. The system and method presents a means of rapidly applying thermal stresses to one or more photovoltaic solar cells in a consistent and repeatable manner.

Hebert, Peter H. (Glendale, CA); Brandt, Randolph J. (Palmdale, CA)

2012-06-19T23:59:59.000Z

177

Simulation of dye solar cells: through and beyond one dimension  

Science Conference Proceedings (OSTI)

In this work we present a Computer Aided Design (CAD) software, called TiberCAD, to simulate Dye Sensitized Solar Cells (DSC). DSCs are particularly interesting devices due to their high efficiency (more than 11% on small area and 8% on large area) and ... Keywords: Drift diffusion, Dye sensitized solar cells, Electrochemistry, Finite element methods, Solar cells

Alessio Gagliardi; Matthias Auf Der Maur; Desiree Gentilini; Aldo Carlo

2011-12-01T23:59:59.000Z

178

EELE408 Photovoltaics Lecture 16: Silicon Solar Cell Fabrication Techniques  

E-Print Network (OSTI)

1 EELE408 Photovoltaics Lecture 16: Silicon Solar Cell Fabrication Techniques Dr. Todd J. Kaiser - Bozeman Screen Printed Solar Cells · Starting wafer is about 0.5 mm thick and 10 x 10 cm2. The wafer is p-type and lightly doped with Boron (1016/cm3) 2 Screen Printed Solar Cells · Saw Damage Etch ­ The starting wafer

Kaiser, Todd J.

179

Method of fabricating a solar cell with a tunnel dielectric layer  

SciTech Connect

Methods of fabricating solar cells with tunnel dielectric layers are described. Solar cells with tunnel dielectric layers are also described.

Dennis, Tim; Harrington, Scott; Manning, Jane; Smith, David; Waldhauer, Ann

2012-12-18T23:59:59.000Z

180

Plastic Schottky barrier solar cells  

SciTech Connect

A photovoltaic cell structure is fabricated from an active medium including an undoped, intrinsically p-type organic semiconductor comprising polyacetylene. When a film of such material is in rectifying contact with a magnesium electrode, a Schottky-barrier junction is obtained within the body of the cell structure. Also, a gold overlayer passivates the magnesium layer on the undoped polyacetylene film.

Waldrop, James R. (Thousand Oaks, CA); Cohen, Marshall J. (Thousand Oaks, CA)

1984-01-24T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


181

An Upside-Down Solar Cell Achieves Record Efficiencies (Fact...  

NLE Websites -- All DOE Office Websites (Extended Search)

by the Federal Laboratory Consortium. The cell's inventors pioneered a new class of solar cells with marked advantages in performance, engineering design, operation, and...

182

Device Physics of Nanoscale Interdigitated Solar Cells (Poster)  

Science Conference Proceedings (OSTI)

Nanoscale interdigitated solar cell device architectures are being investigated for organic and inorganic solar cell devices. Due to the inherent complexity of these device designs quantitative modeling is needed to understand the device physics. Theoretical concepts have been proposed that nanodomains of different phases may form in polycrystalline CIGS solar cells. These theories propose that the nanodomains may form complex 3D intertwined p-n networks that enhance device performance.Recent experimental evidence offers some support for the existence of nanodomains in CIGS thin films. This study utilizes CIGS solar cells to examine general and CIGS-specific concepts in nanoscale interdigitated solar cells.

Metzger, W.; Levi, D.

2008-05-01T23:59:59.000Z

183

Innotech Solar AS formerly known as Solar Cell Repower | Open Energy  

Open Energy Info (EERE)

Innotech Solar AS formerly known as Solar Cell Repower Innotech Solar AS formerly known as Solar Cell Repower Jump to: navigation, search Name Innotech Solar AS (formerly known as Solar Cell Repower) Place Narvik, Norway Zip 8512 Sector Solar Product Norway-based developer of repowering technologies for solar cells. Coordinates 68.439515°, 17.43015° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":68.439515,"lon":17.43015,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

184

Solar Cells in 2009 and Beyond Mike McGehee  

E-Print Network (OSTI)

Solar Cells in 2009 and Beyond Mike McGehee Materials Science and Engineering These slidesTunesU and Youtube. #12;To provide the world with 10 TW of solar electricity by 2030 · We need to grow the industry parity cost depends on location #12;Conventional p-n junction photovoltaic (solar) cell #12;Efficiency

McGehee, Michael

185

Sustainable Energy Science and Engineering Center Solar Cells  

E-Print Network (OSTI)

Sustainable Energy Science and Engineering Center Solar Cells The objectives of this section #12;Sustainable Energy Science and Engineering Center Solar Cells - Future EVERY minute, the sun and vacuum chambers. As a result, solar energy costs roughly three to four times as much as electricity from

Krothapalli, Anjaneyulu

186

Compensated amorphous-silicon solar cell  

DOE Patents (OSTI)

An amorphous silicon solar cell including an electrically conductive substrate, a layer of glow discharge deposited hydrogenated amorphous silicon having regions of differing conductivity with at least one region of intrinsic hydrogenated amorphous silicon. The layer of hydrogenated amorphous silicon has opposed first and second major surfaces where the first major surface contacts the elecrically conductive substrate and an electrode for electrically contacting the second major surface. The intrinsic hydrogenated amorphous silicon region is deposited in a glow discharge with an atmosphere which includes not less than about 0.02 atom percent mono-atomic boron. An improved N.I.P. solar cell is disclosed using a BF/sub 3/ doped intrinsic layer.

Devaud, G.

1982-06-21T23:59:59.000Z

187

Evaluation of concentration solar cells for terrestrial applications  

E-Print Network (OSTI)

Solar energy has become a hot prospect for the future replacement of fossil fuels, which have limited reserves and cause environmental problems. Solar cell is such a device to directly generate electricity from this clean ...

An, Tao, M. Eng. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

188

Inverted amorphous silicon solar cell utilizing cermet layers  

DOE Patents (OSTI)

An amorphous silicon solar cell incorporating a transparent high work function metal cermet incident to solar radiation and a thick film cermet contacting the amorphous silicon opposite to said incident surface.

Hanak, Joseph J. (Lawrenceville, NJ)

1979-01-01T23:59:59.000Z

189

Thin film polycrystalline silicon solar cells  

DOE Green Energy (OSTI)

During the present quarter efficiency of heterostructure solar cells has been increased from 13 to 13.7% for single crystal and from 10.3 to 11.2% for polysilicon. For polysilicon the improvements can be attributed to reductions in grid-area coverage and in reflection losses and for single crystal to a combination of reduction in grid-area coverage and increase in fill factor. The heterostructure cells in both cases were IT0/n-Si solar cells. Degradation in Sn0/sub 2//n-Si solar cells can be greatly reduced to negligible proportions by proper encapsulation. The cells used in stability tests have an average initial efficiency of 11% which reduces to a value of about 10.5% after 6 months of exposure to sunlight and ambient conditions. This small degradation occurs within the first month, and the efficiency remains constant subsequently. The reduction in efficiency is due to a decrease in the open-circuit voltage only, while the short-circuit current and fill factor remain constant. The effects of grain-size on the Hall measurements in polysilicon have been analyzed and interpreted, with some modifications, using a model proposed by Bube. This modified model predicts that the measured effective Hall voltage is composed of components originating from the bulk and space-charge region. For materials with large grains, the carrier concentration is independent of the inter-grain boundary barrier, whereas the mobility is dependent on it. However, for small rains, both the carrier density and mobility depend on the barrier. These predictions are consistant with experimental results of mm-size Wacker polysilicon and ..mu..m-size NTD polysilicon.

Ghosh, A. K.; Feng, T.; Eustace, D. J.; Maruska, H. P.

1980-01-01T23:59:59.000Z

190

Defect behavior of polycrystalline solar cell silicon  

DOE Green Energy (OSTI)

The major objective of this study, conducted from October 1988 to September 1991, was to gain an understanding of the behavior of impurities in polycrystalline silicon and the influence of these impurities on solar cell efficiency. The authors studied edge-defined film-fed growth (EFG) and cast poly-Si materials and solar cells. With EFG Si they concentrated on chromium-doped materials and cells to determine the role of Cr on solar cell performance. Cast poly-Si samples were not deliberately contaminated. Samples were characterized by cell efficiency, current-voltage, deep-level transient spectroscopy (DLTS), surface photovoltage (SPV), open-circuit voltage decay, secondary ion mass spectrometry, and Fourier transform infrared spectroscopy measurements. They find that Cr forms Cr-B pairs with boron at room temperature and these pairs dissociate into Cr{sub i}{sup +} and B{sup {minus}} during anneals at 210{degrees}C for 10 min. Following the anneal, Cr-B pairs reform at room temperature with a time constant of 230 h. Chromium forms CrSi{sub 2} precipitates in heavily contaminated regions and they find evidence of CrSi{sub 2} gettering, but a lack of chromium segregation or precipitation to grain boundaries and dislocations. Cr-B pairs have well defined DLTS peaks. However, DLTS spectra of other defects are not well defined, giving broad peaks indicative of defects with a range of energy levels in the band gap. In some high-stress, low-efficiency cast poly-Si they detect SiC precipitates, but not in low-stress, high-efficiency samples. SPV measurements result in nonlinear SPV curves in some materials that are likely due to varying optical absorption coefficients due to locally varying stress in the material.

Schroder, D.K.; Park, S.H.; Hwang, I.G.; Mohr, J.B.; Hanly, M.P. [Arizona State Univ., Tempe, AZ (US). Center for Solid State Electronics Research

1993-05-01T23:59:59.000Z

191

TRANSPARENT COATINGS FOR SOLAR CELLS RESEARCH  

DOE Green Energy (OSTI)

Todays solar cells are fabricated using metal oxide based transparent conductive coatings (TCC) or metal wires with optoelectronic performance exceeding that currently possible with Carbon Nanotube (CNT) based TCCs. The motivation for replacing current TCC is their inherent brittleness, high deposition cost, and high deposition temperatures; leading to reduced performance on thin substrates. With improved processing, application and characterization techniques Nanofiber and/or CNT based TCCs can overcome these shortcomings while offering the ability to be applied in atmospheric conditions using low cost coating processes At todays level of development, CNT based TCC are nearing commercial use in touch screens, some types of information displays (i.e. electronic paper), and certain military applications. However, the resistivity and transparency requirements for use in current commercial solar cells are more stringent than in many of these applications. Therefore, significant research on fundamental nanotube composition, dispersion and deposition are required to reach the required performance commanded by photovoltaic devices. The objective of this project was to research and develop transparent conductive coatings based on novel nanomaterial composite coatings, which comprise nanotubes, nanofibers, and other nanostructured materials along with binder materials. One objective was to show that these new nanomaterials perform at an electrical resistivity and optical transparency suitable for use in solar cells and other energy-related applications. A second objective was to generate new structures and chemistries with improved resistivity and transparency performance. The materials also included the binders and surface treatments that facilitate the utility of the electrically conductive portion of these composites in solar photovoltaic devices. Performance enhancement venues included: CNT purification and metallic tube separation techniques, chemical doping, CNT patterning and alignment, advances in commercial and research materials and field effect schemes. In addition, Eikos continued to develop improved efficiency coating materials and transfer methods suitable for batch and continuous roll-to-roll fabrication requirements. Finally, Eikos collaborated with NREL and the PV-community at large in fabricating and characterizing Invisicon???® enabled solar cells.

Glatkowski, P.J.; Landis, D.A.

2013-04-16T23:59:59.000Z

192

Solar module having reflector between cells  

DOE Patents (OSTI)

A photovoltaic module comprising an array of electrically interconnected photovoltaic cells disposed in a planar and mutually spaced relationship between a light-transparent front cover member in sheet form and a back sheet structure is provided with a novel light-reflecting means disposed between adjacent cells for reflecting light falling in the areas between cells back toward said transparent cover member for further internal reflection onto the solar cells. The light-reflecting comprises a flexible plastic film that has been embossed so as to have a plurality of small V-shaped grooves in its front surface, and a thin light-reflecting coating on said front surface, the portions of said coating along the sides of said grooves forming light-reflecting facets, said grooves being formed so that said facets will reflect light impinging thereon back into said transparent cover sheet with an angle of incidence greater than the critical angle, whereby substantially all of the reflected light will be internally reflected from said cover sheet back to said solar modules, thereby increasing the current output of the module.

Kardauskas, Michael J. (Billerica, MA)

1999-01-01T23:59:59.000Z

193

High efficiency, radiation-hard solar cells  

DOE Green Energy (OSTI)

The direct gap of the In{sub 1-x}Ga{sub x}N alloy system extends continuously from InN (0.7 eV, in the near IR) to GaN (3.4 eV, in the mid-ultraviolet). This opens the intriguing possibility of using this single ternary alloy system in single or multi-junction (MJ) solar cells of the type used for space-based surveillance satellites. To evaluate the suitability of In{sub 1-x}Ga{sub x}N as a material for space applications, high quality thin films were grown with molecular beam epitaxy and extensive damage testing with electron, proton, and alpha particle radiation was performed. Using the room temperature photoluminescence intensity as a indirect measure of minority carrier lifetime, it is shown that In{sub 1-x}Ga{sub x}N retains its optoelectronic properties at radiation damage doses at least 2 orders of magnitude higher than the damage thresholds of the materials (GaAs and GaInP) currently used in high efficiency MJ cells. This indicates that the In{sub 1-x}Ga{sub x}N is well-suited for the future development of ultra radiation-hard optoelectronics. Critical issues affecting development of solar cells using this material system were addressed. The presence of an electron-rich surface layer in InN and In{sub 1-x}Ga{sub x}N (0 < x < 0.63) was investigated; it was shown that this is a less significant effect at large x. Evidence of p-type activity below the surface in Mg-doped InN was obtained; this is a significant step toward achieving photovoltaic action and, ultimately, a solar cell using this material.

Ager III, J.W.; Walukiewicz, W.

2004-10-22T23:59:59.000Z

194

Economical Pyrite-Based Solar Cells Vaccine for Prevention and ...  

Background The first generation of solar cells, used in 90% of today's cells, have a focus of high efficiency. These cells use a single p-n junction to extract ...

195

Mono-Like Ingot/Wafers Made of Solar-Grade Silicon for Solar Cells ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2012 TMS Annual Meeting & Exhibition. Symposium , Solar Cell Silicon. Presentation Title, Mono-Like Ingot/Wafers Made of...

196

Pokeberries Provide Boost for Solar Cells | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pokeberries Provide Boost for Solar Cells Pokeberries Provide Boost for Solar Cells Pokeberries Provide Boost for Solar Cells May 20, 2010 - 2:41pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? When the red dye from the pokeberries is spread over solar cells, it acts as a light absorber, boosting the technology's efficiency by about seven percent. The dye helps the cell's fibers capture more sunlight to convert into power. A weed Civil War soldiers used to write letters home may hold the secret to cheaper and more efficient solar energy today. Researchers at Wake Forest University's Center for Nanotechnology and Molecular Materials in North Carolina have discovered that red dye from the pokeberry weed makes their low-cost, fiber-based solar cells even more

197

Solare Cell Roof Tile And Method Of Forming Same  

SciTech Connect

A solar cell roof tile includes a front support layer, a transparent encapsulant layer, a plurality of interconnected solar cells and a backskin layer. The front support layer is formed of light transmitting material and has first and second surfaces. The transparent encapsulant layer is disposed adjacent the second surface of the front support layer. The interconnected solar cells has a first surface disposed adjacent the transparent encapsulant layer. The backskin layer has a first surface disposed adjacent a second surface of the interconnected solar cells, wherein a portion of the backskin layer wraps around and contacts the first surface of the front support layer to form the border region. A portion of the border region has an extended width. The solar cell roof tile may have stand-offs disposed on the extended width border region for providing vertical spacing with respect to an adjacent solar cell roof tile.

Hanoka, Jack I. (Brookline, MA); Real, Markus (Oberberg, CH)

1999-11-16T23:59:59.000Z

198

Valuing the Time-Varying Electricity Production of Solar Photovoltaic Cells  

E-Print Network (OSTI)

Production of Solar Photovoltaic Cells Severin BorensteinProduction of Solar Photovoltaic Cells Severin Borenstein 1concerns is so- lar photovoltaic cells (PVs), which capture

Borenstein, Severin

2005-01-01T23:59:59.000Z

199

EELE408 Photovoltaics Lecture 11: Solar Cell Parameters  

E-Print Network (OSTI)

1 EELE408 Photovoltaics Lecture 11: Solar Cell Parameters Dr. Todd J. Kaiser tjkaiser@ece.montana.edu Department of Electrical and Computer Engineering Montana State University - Bozeman Solar Cell Parameters Light IL 3 Voltage Illluminating the cell adds to the "dark" current of the diode The IV curve shifts

Kaiser, Todd J.

200

Third-Generation Solar Cells Using Optical Rectenna  

compete with fossil fuels (Payback time of about 5-7 years). The second generation of solar cells focuses on low production costs using thin film cells, which resulted in much lower efficiency rates. The thirdgeneration of solar cells has not yet ...

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Coaxial silicon nanowires as solar cells and nanoelectronic power sources  

E-Print Network (OSTI)

(EERE) Fuel Cell Technologies Program (FCT) Solar Thermochemical Hydrogen Production R&D portfolioSANDIA REPORT SAND2011-3622 Unlimited Release Printed May 2011 Solar Thermochemical Hydrogen://www.ntis.gov/help/ordermethods.asp?loc=7-4-0#online #12;3 SAND2011-3622 Unlimited Release Printed May 2011 Solar Thermochemical Hydrogen

Marcus, Charles

202

An Overview of Solar Cell Technology Mike McGehee  

E-Print Network (OSTI)

An Overview of Solar Cell Technology Mike McGehee Materials Science and Engineering Global Climate;Primary Photovoltaic (PV) Markets Residential Rooftop Commercial Rooftop Ground mounted (Usually 2Watt and Evergreen Solar went bankrupt Jon Stewart, The Daily Show Solyndra, SpectraWatt and Evergreen Solar went

McGehee, Michael

203

Computational Challenges for Nanostructure Solar Cells Project at NERSC  

NLE Websites -- All DOE Office Websites (Extended Search)

Challenges for Challenges for Nanostructure Solar Cells Computational Challenges for Nanostructure Solar Cells ZZ2.jpg Key Challenges: Current nanostructure solar cells often have energy efficiencies well below that of traditional solar cells. To understand why, one must understand the complete photoelectron dynamics in a nanostructure - the photon absorption, exciton generation, exciton dissociation, carrier transport and carrier collection. However, the large number of surface states, the strong exciton binding energies, the nano-interfaces, the lack of doping, and the possibility of unintended internal electric fields make this a daunting task that requires a suite of techniques and computer codes offering different electronic structure methods and varying levels of

204

Available Technologies: Highly Efficient Multigap Solar Cell Materials  

Scientists at Berkeley Lab have invented multiband gap semiconducting materials for developing solar cells that could achieve power conversion efficiencies of 50 ...

205

Air-stable Nanomaterials for Efficient OLEDs and Solar Cells  

Air-stable Nanomaterials for Efficient OLEDs and Solar Cells . IB-2044, IB-2231 . ... U.S. DEPARTMENT OF ENERGY OFFICE OF SCIENCE UNIVERSITY OF CALIFORNIA.

206

Thinner Film Silicon Solar Cells - Energy Innovation Portal  

Technology Marketing Summary Berkeley Lab scientists have designed a new approach to create thin film silicon solar cells with a potential increase in ...

207

CRADA Final Report: Process development for hybrid solar cells  

E-Print Network (OSTI)

III-Nitride Alloys for Solar Power Conversion. List ofsolar cells have the potential to reduce the cost of concentrator photovoltaic power

Ager, Joel W

2011-01-01T23:59:59.000Z

208

Nanocone-Based Photovoltaic Solar Cells - Oak Ridge National ...  

Nanocone-Based Photovoltaic Solar Cells Note: The technology described above is an early stage opportunity. Licensing rights to this intellectual property may

209

Controlled Structure of Organic-Nanomaterial Solar Cells  

By controlling the molecular shape, structure, and pattern of the materials in organic, polymer-based solar cells, Alex Zettl and Jeffrey Grossman of Berkeley Lab ...

210

More Efficient Polymer Solar Cells by Doping with Ferroelectric ...  

Science Conference Proceedings (OSTI)

Presentation Title, More Efficient Polymer Solar Cells by Doping with ... Mixture for Predicting the Ideal Solubility of Thermally Stable and Unstable Compounds.

211

Manufacturing-Friendly Advance Seen in CIGS Solar Cell Processing...  

NLE Websites -- All DOE Office Websites (Extended Search)

robust, high-performance IZO transparent contact for CIGS solar cells. The standard transparent conducting oxide (TCO) used as the top contact in NREL's record-efficient copper...

212

NREL Measures IMM Solar Cell Performance for CPV (Fact Sheet...  

NLE Websites -- All DOE Office Websites (Extended Search)

New measurement capability supports the development of high-efficiency solar cells for concentrating photovoltaic (CPV) application. NREL scientists recently completed a set of...

213

High-Efficiency, Self-Concentrating Nanoscale Solar Cell  

While solar cells have the potential to provide clean energy for a large portion of the earth's population, no one technology has provided the right ...

214

High Efficiency Multiple-Junction Solar Cells - Energy ...  

Technology Marketing Summary Single junction solar cells have limited efficiency and fail to extract maximum energy from photons outside of a specific ...

215

Low Cost, High Efficiency Tandem Silicon Solar Cells and LEDs  

Wladek Walukiewicz, Joel Ager, and Kin Man Yu of Berkeley Lab have developed high-efficiency solar cells that leverage the well-established design and ...

216

Simple Method Quantifies Recombination Pathways in Solar Cells (Fact Sheet)  

SciTech Connect

NREL's analytic equation uses open-circuit voltage data to determine how much recombination occurs via different channels in a solar cell.

Not Available

2013-09-01T23:59:59.000Z

217

NREL Makes Substantial Progress in Developing CZTSe Solar Cells...  

NLE Websites -- All DOE Office Websites (Extended Search)

non-toxic, Earth-abundant elements. Recently, NREL demonstrated an 8.4%-efficient CZTSe solar cell produced using commercially acceptable manufacturing techniques. Scientists...

218

New Morphological Paradigm Uncovered in Organic Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models...

219

Anodization of Aluminum-Titanium Alloys for Solar Cell Applications  

Science Conference Proceedings (OSTI)

Presentation Title, Anodization of Aluminum-Titanium Alloys for Solar Cell ... Migration of Nanotechnology from Laboratory to Market Place: Arci Experience.

220

NIST Measurements May Help Optimize Organic Solar Cells  

Science Conference Proceedings (OSTI)

... Organic solar cells may be a step closer to market because of measurements taken at the National Institute of Standards and Technology (NIST ...

2012-03-06T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Diffraction: Enhanced Light Absorption of Solar Cells and ...  

Sandia National Laboratories Diffraction: Enhanced Light Absorption of Solar Cells and Photodetectors HTTPS://IP.SANDIA.GOV Sandia National Laboratories is a multi ...

222

Improved Amorphous Silicon Solar Cells - Energy Innovation Portal  

Alex Zettl, Jeffrey Grossman and Lucas Wagner of Lawrence Berkeley National Laboratory have invented hydrogenated amorphous silicon solar cells with 30% improved ...

223

Solar Photovoltaic Cell/Module Shipments Report 2011  

U.S. Energy Information Administration (EIA)

September 2012 U.S. Energy Information Administration | Solar Photovoltaic Cell/Module Shipments Report 2011 7 Table 2. Value, average price, and average efficiency ...

224

Device Physics of Nanoscale Interdigitated Solar Cells: Preprint  

DOE Green Energy (OSTI)

This paper uses multidimensional device simulation to explore the physics and solar cell performance of interdigitated p-n junctions for material parameters relevant to the postulated conditions.

Metzger, W. K.; Levi, D.

2008-05-01T23:59:59.000Z

225

Characterizing Solar Cells with Nanoscale Precision Using a ...  

Science Conference Proceedings (OSTI)

... The use of electron beam induced current to visualize ... Local electrical characterization of cadmium telluride solar cells using low-energy electron ...

2013-12-04T23:59:59.000Z

226

Alloys and Compounds for Thermoelectric and Solar Cell Applications  

Science Conference Proceedings (OSTI)

Jul 31, 2012 ... TMS: Energy Conversion and Storage Committee ... of the alloys and compounds used in the thermoelectric and solar cell devices. Materials of...

227

Laser processing technique for fabricating series-connected and tandem junction series-connected solar cells into a solar battery  

DOE Patents (OSTI)

A method of fabricating series-connected and tandem junction series-connected solar cells into a solar battery with laser scribing.

Hanak, Joseph J. (Lawrenceville, NJ)

1981-01-01T23:59:59.000Z

228

High efficiency, radiation-hard solar cells  

E-Print Network (OSTI)

x Ga x N alloys: a full-solar-spectrum photovoltaic materialto the useful part of the solar spectrum. In fact, current

Ager III, J.W.; Walukiewicz, W.

2004-01-01T23:59:59.000Z

229

Reducing the Cost of Solar Cells  

Science Conference Proceedings (OSTI)

Solar-powered electricity prices could soon approach those of power from coal or natural gas thanks to collaborative research with solar startup Ampulse Corporation at the National Renewable Energy Laboratory. Silicon wafers account for almost half the cost of today's solar photovoltaic panels, so reducing or eliminating wafer costs is essential to bringing prices down. Current crystalline silicon technology converts energy in a highly efficient manner; however, that technology is manufactured with processes that could stand some improvement. The industry needs a method that is less complex, creates less waste and uses less energy. First, half the refined silicon is lost as dust in the wafer-sawing process, driving module costs higher. Wafers are sawn off of large cylindrical ingots, or boules, of silicon. A typical 2-meter boule loses as many as 6,000 potential wafers during sawing. Second, the wafers produced are much thicker than necessary. To efficiently convert sunlight into electricity, the wafers need be only one-tenth the typical thickness. NREL, the Oak Ridge National Laboratory and Ampulse have partnered on an approach to eliminate this waste and dramatically lower the cost of the finished solar panels. By using a chemical vapor deposition process to grow the silicon on inexpensive foil, Ampulse is able to make the solar cells just thick enough to convert most of the solar energy into electricity. No more sawdust - and no more wasting refined silicon materials. NREL developed the technology to grow high-quality silicon and ORNL developed the metal foil that has the correct crystal structure to support that growth. Ampulse is installing a pilot manufacturing line in NREL's Process Development Integration Laboratory, where solar companies can work closely with lab scientists on integrated equipment to answer pressing questions related to their technology development, as well as rapidly overcoming R and D challenges and risk. NREL's program is focused on transformative innovation in the domestic PV industry. With knowledge and expertise acquired from the PDIL pilot production line tools, Ampulse plans to design a full-scale production line to accommodate long rolls of metal foil. The Ampulse process 'goes straight from pure silicon-containing gas to high-quality crystal silicon film,' said Brent Nelson, the operational manager for the Process Development Integration Laboratory. 'The advantage is you can make the wafer just as thin as you need it - 10 microns or less.' Most of today's solar cells are made out of wafer crystalline silicon, though thin-film cells made of more exotic elements such as copper, indium, gallium, arsenic, cadmium, tellurium and others are making a strong push into the market. The advantage of silicon is its abundance, because it is derived from sand. Silicon's disadvantage is that purifying it into wafers suitable for solar cells can be expensive and energy intensive. Manufacturers add carbon and heat to sand to produce metallurgical-grade silicon, which is useful in other industries, but not yet suitable for making solar cells. So this metallurgical-grade silicon is then converted to pure trichlorosilane (SiCl3) or silane (SiH4) gas. Typically, the purified gas is then converted to create a silicon feedstock at 1,000 degrees Celsius. This feedstock is melted at 1,414 C and recrystallized into crystal ingots that are finally sawed into wafers. The Ampulse method differs in that it eliminates the last two steps in the traditional process and works directly with the silane gas growing only the needed silicon right onto a foil substrate. A team of NREL scientists had developed a way to use a process called hot-wire chemical vapor deposition to thicken silicon wafers with near perfect crystal structure. Using a hot tungsten filament much like the one found in an incandescent light bulb, the silane gas molecules are broken apart and deposited onto the wafer using the chemical vapor deposition technique at about 700 C - a much lower temperature than needed to make the wafer. The hot filament dec

Scanlon, B.

2012-04-01T23:59:59.000Z

230

Laser beam apparatus and method for analyzing solar cells  

DOE Patents (OSTI)

A laser beam apparatus and method for analyzing, inter alia, the current versus voltage curve at the point of illumination on a solar cell and the open circuit voltage of a solar cell. The apparatus incorporates a lock-in amplifier, and a laser beam light chopper which permits the measurement of the AC current of the solar cell at an applied DC voltage at the position on the solar cell where the cell is illuminated and a feedback scheme which permits the direct scanning measurements of the open circuit voltage. The accuracy of the measurement is a function of the intensity and wavelength of the laser light with respect to the intensity and wavelength distribution of sunlight and the percentage the dark current is at the open circuit voltage to the short circuit current of the solar cell.

Staebler, David L. (Lawrenceville, NJ)

1980-01-01T23:59:59.000Z

231

Core-Shell Nanopillar Array Solar Cells using Cadmium Sulfide Coating on Indium Phosphide Nanopillars  

E-Print Network (OSTI)

semiconductor nanowire solar cells by selective-area metal-and Y. Yang, A polymer tandem solar cell with 10.6% powerbulk heterojunction plastic solar cells by screen printing,

Tu, Bor-An Clayton

2013-01-01T23:59:59.000Z

232

CRADA Final Report: Process development for hybrid solar cells  

Science Conference Proceedings (OSTI)

TCF funding of a CRADA between LBNL and RSLE leveraged RSLE's original $1M investment in LBNL research and led to development of a solar cell fabrication process that will bring the high efficiency, high voltage hybrid tandem solar cell closer to commercialization. RSLE has already built a pilot line at its Phoenix, Arizona site.

Ager, Joel W

2011-02-14T23:59:59.000Z

233

Research on MPPT for Solar Cells Based on Flyback Converter  

Science Conference Proceedings (OSTI)

A voltage source and rheostat are successfully used to simulate the solar cell's character in this paper. Its feasibility is analyzed theoretically. The basic principle of the maximum power point tracking (MPPT) is described. An improved disturbance ... Keywords: solar cells, maximum power point tracking (MPPT), flyback converter

Zhang Housheng

2010-05-01T23:59:59.000Z

234

Photovoltaic Measurements in Single-Nanowire Silicon Solar Cells  

E-Print Network (OSTI)

Photovoltaic Measurements in Single-Nanowire Silicon Solar Cells Michael D. Kelzenberg, Daniel B Single-nanowire solar cells were created by forming rectifying junctions in electrically contacted vapor-voltage measurements were made under simulated Air Mass 1.5 global illumination. Photovoltaic spectral response

Heaton, Thomas H.

235

Optical modeling of a-Si solar cells  

DOE Green Energy (OSTI)

The authors describe applications of PV Optics to analyze the behavior of a metallic back-reflector on an a-Si solar cell. The calculated results from PV Optics agree well with the measured data on solar cells. Several unexpected results obtained from these calculations are qualitatively explained.

Sopori, B.; Madjdpour, J.; Zhang, Y.; Chen, W.; Guha, S.; Yang, J.; Banerjee, A.; Hegedus, S.

1999-11-04T23:59:59.000Z

236

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Transition metals are one of the main culprits in degrading the efficiency of multicrystalline solar cells. With a suite of x-ray microprobe techniques, a multi-institutional collaboration led by researchers from the University of California, Berkeley, and Berkeley Lab studied the distribution of metal clusters in a variety of multicrystalline solar cells before and after processing. Their discovery that the size, spatial distribution, and chemical binding of metals within clusters is just as important as the total metal concentration in limiting the performance of multicrystalline silicon solar cells led to the concept of defect engineering by optimizing growth and processing sequences to trap metals in their least harmful state.

237

High-Efficiency Solar Cell Concepts: Physics, Materials, and Devices  

DOE Green Energy (OSTI)

Over the past three decades, significant progress has been made in the area of high-efficiency multijunction solar cells, with the effort primarily directed at current-matched solar cells in tandem. The key materials issues here have been obtaining semiconductors with the required bandgaps for sequential absorption of light in the solar spectrum and that are lattice matched to readily available substrates. The GaInP/GaAs/Ge cell is a striking example of success achieved in this area. Recently, several new approaches for high-efficiency solar cell design have emerged, that involve novel methods for tailoring alloy bandgaps, as well as alternate technologies for hetero-epitaxy of III-V's on Si. The advantages and difficulties expected to be encountered with each approach will be discussed, addressing both the materials issues and device physics whilst contrasting them with other fourth-generation solar cell concepts.

Mascarenhas, A.; Francoeur, S.; Seong, M. J.; Fluegel, B.; Zhang, Y.; Wanlass, M. W.

2005-01-01T23:59:59.000Z

238

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Engineering Metal Impurities in Multicrystalline Silicon Solar Cells Print Transition metals are one of the main culprits in degrading the efficiency of multicrystalline solar cells. With a suite of x-ray microprobe techniques, a multi-institutional collaboration led by researchers from the University of California, Berkeley, and Berkeley Lab studied the distribution of metal clusters in a variety of multicrystalline solar cells before and after processing. Their discovery that the size, spatial distribution, and chemical binding of metals within clusters is just as important as the total metal concentration in limiting the performance of multicrystalline silicon solar cells led to the concept of defect engineering by optimizing growth and processing sequences to trap metals in their least harmful state.

239

Genetic algorithm based optimization of advanced solar cell designs modeled in Silvaco AtlasTM .  

E-Print Network (OSTI)

??A genetic algorithm was used to optimize the power output of multi-junction solar cells. Solar cell operation was modeled using the Silvaco ATLASTM software. The (more)

Utsler, James

2006-01-01T23:59:59.000Z

240

Single-junction solar cells with the optimum band gap for ...  

A single-junction solar cell having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown ...

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Efficiency of silicon solar cells containing chromium  

DOE Patents (OSTI)

Efficiency of silicon solar cells containing about 10.sup.15 atoms/cm.sup.3 of chromium is improved about 26% by thermal annealing of the silicon wafer at a temperature of 200.degree. C. to form chromium precipitates having a diameter of less than 1 Angstrom. Further improvement in efficiency is achieved by scribing laser lines onto the back surface of the wafer at a spacing of at least 0.5 mm and at a depth of less than 13 micrometers to preferentially precipitate chromium near the back surface and away from the junction region of the device. This provides an economical way to improve the deleterious effects of chromium, one of the impurities present in metallurgical grade silicon material.

Frosch, Robert A. Administrator of the National Aeronautics and Space (New Port Beach, CA); Salama, Amal M. (New Port Beach, CA)

1982-01-01T23:59:59.000Z

242

Solar cells incorporating light harvesting arrays  

DOE Patents (OSTI)

A solar cell incorporates a light harvesting array that comprises: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to the first electrode, each of the light harvesting rods comprising a polymer of Formula I: X.sup.1.paren open-st.X.sup.m+1).sub.m (I) wherein m is at least 1, and may be from two, three or four to 20 or more; X.sup.1 is a charge separation group (and preferably a porphyrinic macrocycle, which may be one ligand of a double-decker sandwich compound) having an excited-state of energy equal to or lower than that of X.sup.2 ; and X.sup.2 through X.sup.m+1 are chromophores (and again are preferably porphyrinic macrocycles).

Lindsey, Jonathan S. (Raleigh, NC); Meyer, Gerald J. (Baltimore, MD)

2002-01-01T23:59:59.000Z

243

Pennsylvania Company Develops Solar Cell Printing Technology | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pennsylvania Company Develops Solar Cell Printing Technology Pennsylvania Company Develops Solar Cell Printing Technology Pennsylvania Company Develops Solar Cell Printing Technology April 15, 2010 - 4:20pm Addthis Joshua DeLung What does this project do? The technology uses Plextronics' conductive inks that can be printed by manufacturers worldwide to make solar cells, potentially as easily as they might print a newspaper. This method is much less expensive than many others in terms of raw materials and manufacturing costs. Pittsburgh-based Plextronics, plans to commercialize low-cost solar power globally with its conductive ink technologies, a goal that has been helped by a government incubator program focused on finding marketable prototypes by 2012. "For any technology to be truly successful, you have to enable a new

244

Photo of the Week: Butterflies, Crystal Nanostructures and Solar Cell  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Butterflies, Crystal Nanostructures and Solar Butterflies, Crystal Nanostructures and Solar Cell Research Photo of the Week: Butterflies, Crystal Nanostructures and Solar Cell Research October 26, 2012 - 11:44am Addthis What do butterflies and solar cell research have in common? Both have been developing tiny crystals that selectively reflect colors. Over millions of years of evolution, butterfly wings have developed the tiny crystal nanostructures that give butterflies their vivid colors. At Argonne National Laboratory, scientists are working to manufacture these crystals, which could one day be used to create "greener" and more efficient paints, fiber optics and solar cells. In this photo, the iridescent scales of an emerald-patched Cattleheart butterfly are magnified 20 times to highlight the crystals that selectively reflect green colors. | Photo courtesy of Argonne National Laboratory.

245

Solar Energy Materials & Solar Cells 91 (2007) 17261732 Optical and structural properties of Ta2O5CeO2 thin films  

E-Print Network (OSTI)

Solar Energy Materials & Solar Cells 91 (2007) 1726­1732 Optical and structural properties of Ta2O5

Thirumalai, Devarajan

246

Accelerated aging of GaAs concentrator solar cells  

DOE Green Energy (OSTI)

An accelerated aging study of AlGaAs/GaAs solar cells has been completed. The purpose of the study was to identify the possible degradation mechanisms of AlGaAs/GaAs solar cells in terrestrial applications. Thermal storage tests and accelerated AlGaAs corrosion studies were performed to provide an experimental basis for a statistical analysis of the estimated lifetime. Results of this study suggest that a properly designed and fabricated AlGaAs/GaAs solar cell can be mechanically rugged and environmentally stable with projected lifetimes exceeding 100 years.

Gregory, P.E.

1982-04-01T23:59:59.000Z

247

Properties of High Efficiency CIGS Thin Film Solar Cells  

DOE Green Energy (OSTI)

We present experimental results in three areas. Solar cells with an efficiency of 19% have been fabricated with an absorber bandgap in the range of 1.1-1.2 eV. Properties of solar cells fabricated with and without an undoped ZnO layer were compared. The data show that high efficiency cells can be fabricated without using the high-resistivity or undoped ZnO layer. Properties of CIGS solar cells were fabricated from thin absorbers (1 {micro}m) deposited by the three-stage process and simultaneous co-deposition of all the elements. In both cases, solar cells with efficiencies of 16%-17% are obtained.

Ramanathan, K.; Keane, J.; Noufi, R.

2005-02-01T23:59:59.000Z

248

Method for forming indium oxide/n-silicon heterojunction solar cells  

DOE Patents (OSTI)

A high photo-conversion efficiency indium oxide/n-silicon heterojunction solar cell is spray deposited from a solution containing indium trichloride. The solar cell exhibits an Air Mass One solar conversion efficiency in excess of about 10%.

Feng, Tom (Morris Plains, NJ); Ghosh, Amal K. (New Providence, NJ)

1984-03-13T23:59:59.000Z

249

No Foolin': Iron Pyrite Solar Cells  

Science Conference Proceedings (OSTI)

Mar 17, 2009 ... News from the University of California, Berkeley ... Unlike silicon and other solar materials commonly used today, these alternatives are...

250

TOPCAT Solar Cell Alignment & Energy Concentration Technology ...  

Patent 7,667,833: Alignment method for parabolic trough solar concentrators A Theoretical Overlay Photographic (TOP) alignment method uses the overlay of a ...

251

Approaches to Future Generation Photovoltaics and Solar Fuels: Quantum Dots, Arrays, and Quantum Dot Solar Cells  

Science Conference Proceedings (OSTI)

One potential, long-term approach to more efficient and lower cost future generation solar cells for solar electricity and solar fuels is to utilize the unique properties of quantum dots (QDs) to control the relaxation pathways of excited states to enhance multiple exciton generation (MEG). We have studied MEG in close-packed PbSe QD arrays where the QDs are electronically coupled in the films and thus exhibit good transport while still maintaining quantization and MEG. We have developed simple, all-inorganic solution-processable QD solar cells that produce large short-circuit photocurrents and power conversion efficiencies above 5% via nanocrystalline p-n junctions. These solar cells show QYs for photocurrent that exceed 100% in the photon energy regions where MEG is possible; the photocurrent MEG QYs as a function of photon energy match those determined via time-resolved spectroscopy Recent analyses of the major effect of MEG combined with solar concentration on the conversion efficiency of solar cells will also be discussed.

Semonin, O.; Luther, J.; Beard, M.; Johnson, J.; Gao, J.; Nozik, A.

2012-01-01T23:59:59.000Z

252

Current- and lattice-matched tandem solar cell  

DOE Patents (OSTI)

A multijunction (cascade) tandem photovoltaic solar cell device is fabricated of a Ga/sub x/In/sub 1-x/P (0.505 equal to or less than x equal to or less than 0.515) top cell semiconductor lattice-matched to a GaAs bottom cell semiconductor at a low resistance heterojunction, preferably a p/sup +//n/sup +/ heterojunction between the cells. The top and bottom cells are both lattice-matched and current-matched for high efficiency solar radiation conversion to electrical energy.

Olson, J.M.

1985-10-21T23:59:59.000Z

253

NREL Makes Substantial Progress in Developing CZTSe Solar Cells (Fact Sheet) (Revised)  

DOE Green Energy (OSTI)

By defining the deposition process, NREL has significantly improved the conversion efficiency of CZTSe solar cells.

Not Available

2011-11-01T23:59:59.000Z

254

Iran Thomas Auditorium, 8600 Nano Carbon: From Solar Cells to...  

NLE Websites -- All DOE Office Websites (Extended Search)

November 3, 2011 4:00 pm Iran Thomas Auditorium, 8600 Nano Carbon: From Solar Cells to Atomic Drums Paul McEuen Goldwin Smith Professor of Physics, Cornell University and Kavli...

255

Continuous On-Line Monitoring of Solar Cells  

Semiconductor wafers are used for a variety of purposes in the semiconductor, solar cell, transistor, and other industries. Wafer quality often depends on variables such as thickness and surface characteristics. Poor quality wafers may have uneven ...

256

Nanostructured architectures for colloidal quantum dot solar cells  

E-Print Network (OSTI)

This thesis introduces a novel ordered bulk heterojunction architecture for colloidal quantum dot (QD) solar cells. Quantum dots are solution-processed nanocrystals whose tunable bandgap energies make them a promising ...

Jean, Joel, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

257

Understanding the Chemistry of Dye Sensitized Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Understanding the Chemistry of Dye Sensitized Solar Cells Speaker(s): Brian O'Regan Date: January 15, 2009 (All day) Location: 90-3122 Seminar HostPoint of Contact: Michael G Apte...

258

Efficient light trapping structure in thin film silicon solar cells  

E-Print Network (OSTI)

Thin film silicon solar cells are believed to be promising candidates for continuing cost reduction in photovoltaic panels because silicon usage could be greatly reduced. Since silicon is an indirect bandgap semiconductor, ...

Sheng, Xing

259

Harmful Shunting Mechanisms Found in Silicon Solar Cells (Revised...  

NLE Websites -- All DOE Office Websites (Extended Search)

for the degradation in open-circuit voltage and high dark currents in epitaxial silicon solar cells. The technique is also appli- cable to other PV technologies such as CIGS and...

260

Light trapping limits in plasmonic solar cells: an analytical investigation  

E-Print Network (OSTI)

We analytically investigate the light trapping performance in plasmonic solar cells with Si/metallic structures. We consider absorption enhancements for surface plasmon polaritons (SPPs) at planar Si/metal interfaces and ...

Sheng, Xing

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Process Technology and Advanced Concepts: Organic Solar Cells (Fact Sheet)  

DOE Green Energy (OSTI)

Capabilities fact sheet for the National Center for Photovoltaics: Process Technology and Advanced Concepts: Organic Solar Cell that includes scope, core competencies and capabilities, and contact/web information.

Not Available

2011-06-01T23:59:59.000Z

262

Toward Improved Hybrid Solar Cells (IN-07-053)  

In an effort to help build a sufficient supply of clean energy, scientists from Argonne National Laboratory have developed a method to create improved hybrid solar cells through the ultraviolet polymerization of a polymer precursor.

263

Third-Generation Solar Cells Using Optical Rectenna Vaccine ...  

but resulted in a price too high to compete with fossil fuels (Payback time of about 5-7 years). The second generation of solar cells focuses on low production costs

264

2D monolayers could yield thinnest solar cells ever  

NLE Websites -- All DOE Office Websites (Extended Search)

us: how with just two layers of material it is possible to absorb 10 percent of the solar spectrum and have a cell that is 2 percent efficient as a result." NERSC...

265

CIGS-Based Solar Cells Prepared from Electrodeposited Precursor...  

NLE Websites -- All DOE Office Websites (Extended Search)

CIGS absorbers using several techniques, including vacuum and non-vacuum technologies. Thin-film solar cell devices based on PVD CIGS have demonstrated an efficiency of 20.1%. 1...

266

High-Efficiency, Self-Concentrating Nanoscale Solar Cell - Energy ...  

While solar cells have the potential to provide clean energy for a large portion of the earths population, no one technology has provided the right combination of ...

267

New functional polymers for sensors, smart materials and solar cells  

E-Print Network (OSTI)

Organic polymers can be used as the active component of sensors, smart materials, chemical-delivery systems and the active layer of solar cells. The rational design and modification of the chemical structure of polymers ...

Lobez Comeras, Jose Miguel

2012-01-01T23:59:59.000Z

268

Dye-sensitized Schottky barrier solar cells  

DOE Patents (OSTI)

A low-cost dye-sensitized Schottky barrier solar cell comprised of a substrate of semiconductor with an ohmic contact on one face, a sensitizing dye adsorbed onto the opposite face of the semiconductor, a transparent thin-film layer of a reducing agent over the dye, and a thin-film layer of metal over the reducing agent. The ohmic contact and metal layer constitute electrodes for connection to an external circuit and one or the other or both are made transparent to permit light to penetrate to the dye and be absorbed therein for generating electric current. The semiconductor material chosen to be the substrate is one having a wide bandgap and which therefore is transparent; the dye selected is one having a ground state within the bandgap of the semiconductor to generate carriers in the semiconductor, and a first excited state above the conduction band edge of the semiconductor to readily conduct electrons from the dye to the semiconductor; the reducing agent selected is one having a ground state above the ground state of the sensitizer to provide a plentiful source of electrons to the dye during current generation and thereby enhance the generation; and the metal for the thin-film layer of metal is selected to have a Fermi level in the vicinity of or above the ground state of the reducing agent to thereby amply supply electrons to the reducing agent.

Skotheim, Terje A. (Berkeley, CA)

1978-01-01T23:59:59.000Z

269

Recent technological advances in thin film solar cells  

DOE Green Energy (OSTI)

High-efficiency, low-cost thin film solar cells are an exciting photovoltaic technology option for generating cost-effective electricity in 1995 and beyond. This paper reviews the substantial advances made by several thin film solar cell technologies, namely, amorphous silicon, copper indium diselenide, cadmium telluride, and polycrystalline silicon. Recent examples of utility demonstration projects of these emerging materials are also discussed. 8 refs., 4 figs.

Ullal, H.S.; Zwelbel, K.; Surek, T.

1990-03-01T23:59:59.000Z

270

Amorphous silicon/polycrystalline thin film solar cells  

DOE Patents (OSTI)

An improved photovoltaic solar cell is described including a p-type amorphous silicon layer, intrinsic amorphous silicon, and an n-type polycrystalline semiconductor such as cadmium sulfide, cadmium zinc sulfide, zinc selenide, gallium phosphide, and gallium nitride. The polycrystalline semiconductor has an energy bandgap greater than that of the amorphous silicon. The solar cell can be provided as a single-junction device or a multijunction device.

Ullal, H.S.

1991-03-13T23:59:59.000Z

271

Photo of the Week: Record-Breaking Solar Cells | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Record-Breaking Solar Cells Record-Breaking Solar Cells Photo of the Week: Record-Breaking Solar Cells December 7, 2012 - 2:27pm Addthis Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography tool used to manufacture these solar cells. | Photo by Daniel Derkacs/SolarJunction. Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography

272

Photo of the Week: Record-Breaking Solar Cells | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Photo of the Week: Record-Breaking Solar Cells Photo of the Week: Record-Breaking Solar Cells Photo of the Week: Record-Breaking Solar Cells December 7, 2012 - 2:27pm Addthis Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography tool used to manufacture these solar cells. | Photo by Daniel Derkacs/SolarJunction. Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography

273

Organic Solar Cells: Absolute Measurement of Domain Composition and  

NLE Websites -- All DOE Office Websites (Extended Search)

Organic Solar Cells: Absolute Organic Solar Cells: Absolute Measurement of Domain Composition and Nanoscale Size Distribution Explains Performance in Solar Cells Organic Solar Cells: Absolute Measurement of Domain Composition and Nanoscale Size Distribution Explains Performance in Solar Cells Print Tuesday, 22 January 2013 00:00 This front cover represents the morphology and resulting device dynamics in organic solar cell blend films of PTB7 and PC71BM, as revealed by combined resonant x-ray scattering and microscopy done at the Advanced Light Source. Harald Ade and co-workers find that the fullerene molecules (red) are miscible in the polymer (blue) up to 30 wt.%, above which they begin to agglomerate (bottom). This agglomeration is important for the optoelectronic processes within the device, but the agglomerates must be kept to small sizes by the solvent processing additive diiodooctane (DIO). Correlation of this morphology with the spectrally resolved quantum efficiency shows that the yellow excitons created upon photoabsorption must arrive at the agglomerate interface for charge separation to occur. The blue electrons and green holes can then percolate through appropriate molecules in the mixed matrix to the electrodes for harvesting of electrical energy. Article Link (PDF)

274

MIS and SIS solar cells on polycrystalline silicon  

DOE Green Energy (OSTI)

MIS and SIS structured solar cells are receiving much attention in the photovoltaic community. Seemingly, these cells could be a viable alternative to thermally diffused p-n junctions for use on thin-film polycrystalline silicon substrates. This review describes MIS/SIS structured solar cells and the possible advantages of these structures for use with thin-film polycrystalline silicon. The results of efficiency calculations are presented. Also addressed are lifetime stability and fabrication techniques amenable to large scale production. Finally, the relative advantages and disadvantages of these cells and the results obtained are presented.

Cheek, G.; Mertens, R.

1980-02-01T23:59:59.000Z

275

Solar Cells, Wound Repair Winning GVC Technologies | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Cells, Wound Repair Winning GVC Technologies Solar Cells, Wound Repair Winning GVC Technologies March 26, 2010 Graduate student teams from the University of Arkansas and the University of Maryland earned first place in the energy and security categories at the 2010 GVC hosted by ORNL March 24-26. The competition, in its fourth year, attracts students developing new technologies and venture investors with expertise in the market. The first-prize winners each received $25,000. Douglas Hutchings, Stephen Ritterbush, and Seth Shumate from Arkansas won first place in the energy division for Silicon Solar Solutions. "Our method replaces the expensive top layer of solar cells with a thinner, large-grain polysilicon at lower temperatures, which reduces cost and is appealing to manufacturers," said Ritterbush.

276

Epitaxial silicon growth for solar cells. Final report  

DOE Green Energy (OSTI)

The objectives of this contract were: (1) to determine the feasibility of silicon epitaxial growth on low-cost silicon substrates for the development of silicon sheet capable of producing low-cost, high efficiency solar cells; (2) to achieve a goal of 12% (AM-0) efficient solar cells fabricated on thin epitaxial layers (<25 ..mu..m) grown on low-cost substrates; and (3) to evaluate the add-on cost for the epitaxial process and to develop low-cost epitaxial growth procedures for application in conjunction with low-cost silicon substrates. The basic epitaxial procedures and solar-cell fabrication and evaluation techniques are described, followed by a discussion of the development of baseline epitaxial solar-cell structures, grown on high-quality conventional silicon substrates. This work resulted in the definition of three basic structures which reproducibly yielded efficiencies in the range of 12 to 13.7%. These epitaxial growth procedures and baseline structures were then used to grow diagnostic layers and solar cells on four potentially low-cost silicon substrates. A description of the crystallographic properties of such layers and the performance of epitaxially grown solar cells fabricated on these materials is given. The major results were the achievement of cell efficiencies of 10.6 to 11.2% on multigrained substrates and approx. 13% on a low-cost single-crystal substrate. An advanced epitaxial reactor, the Rotary Disc, is described. The results of growing solar-cell structures of the baseline type and on low-cost substrates are given. The add-on cost for the epitaxial process is assessed. These cost estimates show a value of approx. 0.46/W using existing or near-term technologies and project an add-on cost of $0.10/W for future reactors.

D'Aiello, R.V.; Robinson, P.H.; Richman, D.

1979-04-01T23:59:59.000Z

277

Fabrication and Characterization of Organic Solar Cells  

E-Print Network (OSTI)

treatment of indium tin oxide for organicsolarJR. CriteriaforITO(indium?tin?oxide)anorganic lightexpansive material, indium thin oxide (ITO) thin films, with

Yengel, Emre

2010-01-01T23:59:59.000Z

278

Method Of Making Solar Collectors By In-Situ Encapsulation Of Solar Cells  

DOE Patents (OSTI)

A method of making solar collectors by encapsulating photovoltaic cells within a base of an elongated solar collector wherein heat and pressure are applied to the cells in-situ, after an encapsulating material has been applied. A tool is fashioned having a bladder expandable under gas pressure, filling a region of the collector where the cells are mounted. At the same time, negative pressure is applied outside of the bladder, enhancing its expansion. The bladder presses against a platen which contacts the encapsulated cells, causing outgassing of the encapsulant, while heat cures the encapsulant. After curing, the bladder is deflated and the tool may be removed from the collector and base and reflective panels put into place, if not already there, thereby allowing the solar collector to be ready for use.

Carrie, Peter J. (Toronto, CA); Chen, Kingsley D. D. (Markham, CA)

2000-10-24T23:59:59.000Z

279

The ultra-thin solar cells that could generate power through windows  

E-Print Network (OSTI)

The ultra-thin solar cells that could generate power through windows By Claire Bates Last updated, generating enough electricity to power the GPS or air conditioning. Solar cells, which convert solar energy into tinted windows Page 1 of 3The ultra-thin solar cells that could generate power through windows | Mail

Rogers, John A.

280

Fabrication and Characterization of Organic Solar Cells  

E-Print Network (OSTI)

processablepolymerphotovoltaiccellsbyself?organizationPhotodiodes, and Photovoltaic Cells. AppliedPhysicsF, Heeger AJ. Polymer Photovoltaic Cells ? Enhanced

Yengel, Emre

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Point-Contact Silicon Solar Cells  

Science Conference Proceedings (OSTI)

A new type of silicon photovoltaic cell called the point-contact cell is under development. This report describes the cell and an analytic model developed for use in design optimization. Necessary future cell development work is discussed.

1983-05-01T23:59:59.000Z

282

Three dimensional amorphous silicon/microcrystalline silicon solar cells  

DOE Patents (OSTI)

Three dimensional deep contact amorphous silicon/microcrystalline silicon (a-Si/{micro}c-Si) solar cells are disclosed which use deep (high aspect ratio) p and n contacts to create high electric fields within the carrier collection volume material of the cell. The deep contacts are fabricated using repetitive pulsed laser doping so as to create the high aspect p and n contacts. By the provision of the deep contacts which penetrate the electric field deep into the material where the high strength of the field can collect many of the carriers, thereby resulting in a high efficiency solar cell. 4 figs.

Kaschmitter, J.L.

1996-07-23T23:59:59.000Z

283

Three dimensional amorphous silicon/microcrystalline silicon solar cells  

DOE Patents (OSTI)

Three dimensional deep contact amorphous silicon/microcrystalline silicon (a-Si/.mu.c-Si) solar cells which use deep (high aspect ratio) p and n contacts to create high electric fields within the carrier collection volume material of the cell. The deep contacts are fabricated using repetitive pulsed laser doping so as to create the high aspect p and n contacts. By the provision of the deep contacts which penetrate the electric field deep into the material where the high strength of the field can collect many of the carriers, thereby resulting in a high efficiency solar cell.

Kaschmitter, James L. (Pleasanton, CA)

1996-01-01T23:59:59.000Z

284

Laminated photovoltaic modules using back-contact solar cells  

DOE Patents (OSTI)

Photovoltaic modules which comprise back-contact solar cells, such as back-contact crystalline silicon solar cells, positioned atop electrically conductive circuit elements affixed to a planar support so that a circuit capable of generating electric power is created. The modules are encapsulated using encapsulant materials such as EVA which are commonly used in photovoltaic module manufacture. The module designs allow multiple cells to be electrically connected in a single encapsulation step rather than by sequential soldering which characterizes the currently used commercial practices.

Gee, James M. (Albuquerque, NM); Garrett, Stephen E. (Albuquerque, NM); Morgan, William P. (Albuquerque, NM); Worobey, Walter (Albuquerque, NM)

1999-09-14T23:59:59.000Z

285

Thermoelectric Field Effects in Low Dimensional Structure Solar Cells  

E-Print Network (OSTI)

Taking into account the temperature gradients in solar cells, it is shown that their efficiency can be increased beyond the Shockley- Queisser- limit [1]. The driving force for this gain is the temperature gradient between this region and its surroundings. A quantitative theory is given. Though the effect is found to be weak in conventional solar cells, it is argued that it can be substantially increased by proper choice of materials and design of the device. In particular, it is shown that the insertion of a quantum well can enhance the efficiency beyond the one of a single gap cell, due to the presence of temperature jumps at the heterojunctions.

Stefan Kettemann A; Jean-francois Guillemoles B

2002-01-01T23:59:59.000Z

286

Questions I will answer What is a solar cell?  

E-Print Network (OSTI)

used? · Where do they compete economically with coal-fired power plants? · How cells are safe and have few non-desirable environmental impacts. ·Solar cells can replace coal, which Source: Deutsche Bank, January 2011; Systems are global (i.e., blended across geographies) My source: R

McGehee, Michael

287

Infrared NDT methods applied to solar cell and panel characterization  

DOE Green Energy (OSTI)

Infrared nondestructive testing (NDT) methods are described that have a good potential for providing valuable data concerning solar cell or panel characteristics without requiring contact with the photovoltaic device. Preliminary tests with cells and panels were conducted and the infrared NDT results are presented and discussed. (MHR)

Green, D. R.; Olsen, L. C.

1978-10-20T23:59:59.000Z

288

Upside-Down Solar Cell Achieves Record Efficiencies (Fact Sheet)  

DOE Green Energy (OSTI)

The inverted metamorphic multijunction (IMM) solar cell is an exercise in efficient innovation - literally, as the technology boasted the highest demonstrated efficiency for converting sunlight into electrical energy at its debut in 2005. Scientists at the National Renewable Energy Laboratory (NREL) inverted the conventional photovoltaic (PV) structure to revolutionary effect, achieving solar conversion efficiencies of 33.8% and 40.8% under one-sun and concentrated conditions, respectively.

Not Available

2010-12-01T23:59:59.000Z

289

New Morphological Paradigm Uncovered in Organic Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

New Morphological Paradigm New Morphological Paradigm Uncovered in Organic Solar Cells New Morphological Paradigm Uncovered in Organic Solar Cells Print Wednesday, 27 April 2011 00:00 Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

290

New Morphological Paradigm Uncovered in Organic Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

291

New Morphological Paradigm Uncovered in Organic Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

292

New Morphological Paradigm Uncovered in Organic Solar Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

New Morphological Paradigm Uncovered in Organic Solar Cells Print New Morphological Paradigm Uncovered in Organic Solar Cells Print Organic solar cells are made of light, flexible, renewable materials; they require simple and inexpensive processing steps and could produce an economically competitive and environmentally friendly energy source. Understanding the fundamentals of organic solar cell function is therefore vital to uncovering their maximum potential. Models describing critical device functions such as charge separation and transport often depend on simplistic morphological assumptions, including discrete interfaces between pure electron donor and acceptor materials. In contrast, recent spectroscopy and scattering studies conducted by North Carolina State University and Cambridge University researchers at ALS Beamlines 5.3.2 and 7.3.3 found a substantial amount of molecular mixing between model materials (polymers and fullerenes) currently used in bulk heterojunction (BHJ) organic solar cells. This suggests that the amorphous portions of these devices do not have pure domains, and the paradigm of device operation may need to be refined to accommodate this newly discovered complexity.

293

High-efficiency solar cell and method for fabrication  

DOE Patents (OSTI)

A high-efficiency 3- or 4-junction solar cell is disclosed with a theoretical AM0 energy conversion efficiency of about 40%. The solar cell includes p-n junctions formed from indium gallium arsenide nitride (InGaAsN), gallium arsenide (GaAs) and indium gallium aluminum phosphide (InGaAlP) separated by n-p tunnel junctions. An optional germanium (Ge) p-n junction can be formed in the substrate upon which the other p-n junctions are grown. The bandgap energies for each p-n junction are tailored to provide substantially equal short-circuit currents for each p-n junction, thereby eliminating current bottlenecks and improving the overall energy conversion efficiency of the solar cell. Additionally, the use of an InGaAsN p-n junction overcomes super-bandgap energy losses that are present in conventional multi-junction solar cells. A method is also disclosed for fabricating the high-efficiency 3- or 4-junction solar cell by metal-organic chemical vapor deposition (MOCVD). 4 figs.

Hou, H.Q.; Reinhardt, K.C.

1999-08-31T23:59:59.000Z

294

High-efficiency solar cell and method for fabrication  

DOE Patents (OSTI)

A high-efficiency 3- or 4-junction solar cell is disclosed with a theoretical AM0 energy conversion efficiency of about 40%. The solar cell includes p-n junctions formed from indium gallium arsenide nitride (InGaAsN), gallium arsenide (GaAs) and indium gallium aluminum phosphide (InGaAlP) separated by n-p tunnel junctions. An optional germanium (Ge) p-n junction can be formed in the substrate upon which the other p-n junctions are grown. The bandgap energies for each p-n junction are tailored to provide substantially equal short-circuit currents for each p-n junction, thereby eliminating current bottlenecks and improving the overall energy conversion efficiency of the solar cell. Additionally, the use of an InGaAsN p-n junction overcomes super-bandgap energy losses that are present in conventional multi-junction solar cells. A method is also disclosed for fabricating the high-efficiency 3- or 4-junction solar cell by metal-organic chemical vapor deposition (MOCVD).

Hou, Hong Q. (Albuquerque, NM); Reinhardt, Kitt C. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

295

A model to determine financial indicators for organic solar cells  

Science Conference Proceedings (OSTI)

Organic solar cells are an emerging photovoltaic technology that is inexpensive and easy to manufacture, despite low efficiency and stability. A model, named TEEOS (Technical and Economic Evaluator for Organic Solar), is presented that evaluates organic solar cells for various solar energy applications in different geographic locations, in terms of two financial indicators, payback period and net present value (NPV). TEEOS uses SMARTS2 software to estimate broadband (280-4000 nm) spectral irradiance data and with the use of a cloud modification factor, predicts hourly irradiation in the absence of actual broadband irradiance data, which is scarce for most urban locations. By using the avoided cost of electricity, annual savings are calculated which produce the financial indicators. It is hoped that these financial indicators can help guide certain technical decisions regarding the direction of research for organic solar cells, for example, increasing efficiency or increasing the absorptive wavelength range. A sample calculation using solar hats is shown to be uneconomical, but a good example of large-scale organic PV production. (author)

Powell, Colin; Bender, Timothy; Lawryshyn, Yuri [Department of Chemical Engineering and Applied Chemistry, Faculty of Engineering and Applied Science, University of Toronto, 200 College Street, Toronto, Ont. (Canada)

2009-11-15T23:59:59.000Z

296

Investigation of the Role of Trap States in Solar Cell Reliability using Photothermal Deflection Spectroscopy  

E-Print Network (OSTI)

as coal or oil. The photovoltaic cells which constitute mostand conventional inorganic photovoltaic cells is that lightand Characterization Photovoltaic (PV) cells convert solar

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

297

Method of making quasi-grain boundary-free polycrystalline solar cell structure and solar cell structure obtained thereby  

DOE Patents (OSTI)

A new solar cell structure is provided which will increase the efficiency of polycrystalline solar cells by suppressing or completely eliminating the recombination losses due to the presence of grain boundaries. This is achieved by avoiding the formation of the p-n junction (or other types of junctions) in the grain boundaries and by eliminating the grain boundaries from the active area of the cell. This basic concept can be applied to any polycrystalline material; however, it will be most beneficial for cost-effective materials having small grains, including thin film materials.

Gonzalez, Franklin N. (Gainesville, FL); Neugroschel, Arnost (Gainesville, FL)

1984-02-14T23:59:59.000Z

298

Semiconductor liquid-junction solar cell  

DOE Patents (OSTI)

A semiconductor liquid junction photocell in which the photocell is in the configuration of a light concentrator and in which the electrolytic solution both conducts current and facilitates the concentration of incident solar radiation onto the semiconductor. The photocell may be in the configuration of a non-imaging concentrator such as a compound parabolic concentrator, or an imaging concentrator such as a lens.

Parkinson, B.A.

1982-10-29T23:59:59.000Z

299

Solar-Hydrogen Fuel-Cell Vehicles  

E-Print Network (OSTI)

LemonsR. A. ( 1990) Fuel Cells for Transportation. Jour- DC,M. A. (1992). Hydrogen Fuel-Cell Vehicles. Re- koebensteinsolid tember. oxide fuel cell development. Journal of

DeLuchi, Mark A.; Ogden, Joan M.

1993-01-01T23:59:59.000Z

300

Quantum Dot Solar Cells with Multiple Exciton Generation  

DOE Green Energy (OSTI)

We have measured the quantum yield of the multiple exciton generation (MEG) process in quantum dots (QDs) of the lead-salt semiconductor family (PbSe, PbTe, and PbS) using fs pump-probe transient absorption measurements. Very high quantum yields (up to 300%) for charge carrier generation from MEG have been measured in all of the Pb-VI QDs. We have calculated the potential maximum performance of various MEG QD solar cells in the detailed balance limit. We examined a two-cell tandem PV device with singlet fission (SF), QD, and normal dye (N) absorbers in the nine possible series-connected combinations to compare the tandem combinations and identify the combinations with the highest theoretical efficiency. We also calculated the maximum efficiency of an idealized single-gap MEG QD solar cell with M multiplications and its performance under solar concentration.

Hanna, M. C.; Beard, M. C.; Johnson, J. C.; Murphy, J.; Ellingson, R. J.; Nozik, A. J.

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

New approaches for high-efficiency solar cells. Final report  

DOE Green Energy (OSTI)

This report summarizes the activities carried out in this subcontract. These activities cover, first the atomic layer epitaxy (ALE) growth of GaAs, AlGaAs and InGaP at fairly low growth temperatures. This was followed by using ALE to achieve high levels of doping both n-type and p-type required for tunnel junctions (Tj) in the cascade solar cell structures. Then the authors studied the properties of AlGaAs/InGaP and AlGaAs/GaAs tunnel junctions and their performances at different growth conditions. This is followed by the use of these tunnel junctions in stacked solar cell structures. The effect of these tunnel junctions on the performance of stacked solar cells was studied at different temperatures and different solar fluences. Finally, the authors studied the effect of different types of black surface fields (BSF), both p/n and n/p GaInP solar cell structures, and their potential for window layer applications. Parts of these activities were carried in close cooperation with Dr. Mike Timmons of the Research Triangle Institute.

Bedair, S.M.; El-Masry, N.A. [North Carolina State Univ., Raleigh, NC (United States)

1997-12-01T23:59:59.000Z

302

Identifying Optimal Inorganic Nanomateirals for Hybrid Solar Cells  

DOE Green Energy (OSTI)

As a newly developed photovoltaic technology, organic-inorganic hybrid solar cells have attracted great interest because of the combined advantages from both components. An ideal inorganic acceptor should have a band gap of about 1.5 eV and energy levels of frontier orbitals matching those of the organic polymer in hybrid solar cells. Hybrid density functional calculations are performed to search for optimal inorganic nanomaterials for hybrid solar sells based on poly(3-hexylthiophene) (P3HT). Our results demonstrate that InSb quantum dots or quantum wires can have a band gap of about 1.5 eV and highest occupied molecular orbital level about 0.4 eV lower than P3HT, indicating that they are good candidates for use in hybrid solar cells. In addition, we predict that chalcopyrite MgSnSb{sub 2} quantum wire could be a low-cost material for realizing high-efficiency hybrid solar cells.

Xiang, H.; Wei, S. H.; Gong, X. G.

2009-01-01T23:59:59.000Z

303

Method of making a back contacted solar cell  

DOE Patents (OSTI)

A back-contacted solar cell having laser-drilled vias connecting the front-surface carrier-collector junction to an electrode grid on the back surface. The structure may also include a rear surface carrier-collector junction connected to the same grid. The substrate is connected to a second grid which is interdigitated with the first. Both grids are configured for easy series connection with neighboring cells. Several processes are disclosed to produce the cell.

Gee, James M. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

304

Method of making a back contacted solar cell  

DOE Patents (OSTI)

A back-contacted solar cell is described having laser-drilled vias connecting the front-surface carrier-collector junction to an electrode grid on the back surface. The structure may also include a rear surface carrier-collector junction connected to the same grid. The substrate is connected to a second grid which is interdigitated with the first. Both grids are configured for easy series connection with neighboring cells. Several processes are disclosed to produce the cell. 2 figs.

Gee, J.M.

1995-11-21T23:59:59.000Z

305

Berkeley Lab Sheds Light on Improving Solar Cell Efficiency  

DOE Green Energy (OSTI)

Typical manufacturing methods produce solar cells with an efficiency of 12-15%; and 14% efficiency is the bare minimum for achieving a profit. In work performed at the Ernest Orlando Lawrence Berkeley National Laboratory (Berkeley, CA, 5 10-486-577 1)--a US Department of Energy national laboratory that conducts unclassified scientific research and is managed by the University of California--scientist Scott McHugo has obtained keen insights into the impaired performance of solar cells manufactured from polycrystalline silicon. The solar cell market is potentially vast, according to Berkeley Lab. Lightweight solar panels are highly beneficial for providing electrical power to remote locations in developing nations, since there is no need to build transmission lines or truck-in generator fuel. Moreover, industrial nations confronted with diminishing resources have active programs aimed at producing improved, less expensive solar cells. 'In a solar cell, there is a junction between p-type silicon and an n-type layer, such as diffused-in phosphorous', explained McHugo, who is now with Berkeley Lab's Accelerator and Fusion Research Division. 'When sunlight is absorbed, it frees electrons, which start migrating in a random-walk fashion toward that junction. If the electrons make it to the junction; they contribute to the cell's output of electric current. Often, however, before they reach the junction, they recombine at specific sites in the crystal' (and, therefore, cannot contribute to current output). McHugo scrutinized a map of a silicon wafer in which sites of high recombination appeared as dark regions. Previously, researchers had shown that such phenomena occurred not primarily at grain boundaries in the polycrystalline material, as might be expected, but more often at dislocations in the crystal. However, the dislocations themselves were not the problem. Using a unique heat treatment technique, McHugo performed electrical measurements to investigate the material at the dislocations. He was purportedly the first to show that they were 'decorated' with iron.

Lawrence Berkeley National Laboratory

2007-07-20T23:59:59.000Z

306

Comparison of Dye-Sensitized Rutile- and Anatase-Based TiO2 Solar Cells  

DOE Green Energy (OSTI)

The objective of this work is to develop and optimize the new dye-sensitized solar cell technology. In view of the infancy of rutile material development for solar cells, the PV response of the dye-sensitized rutile-based solar cell is remarkably close to that of the anatase-based cell.

Park, N. G.; van de Lagemaat, J.; Frank, A. J.

2000-01-01T23:59:59.000Z

307

Solceller som energiklla och solskydd fr tlt; Solar cells as power source and solar protection roof for shelters.  

E-Print Network (OSTI)

?? This degree project is an investigation of solar cells and their ability to deliver electric power as well as reducing the need for cooling. (more)

Lnn, Viktoria

2008-01-01T23:59:59.000Z

308

Solar cells: what you always wanted to know  

SciTech Connect

This book discusses the development in the photovoltaics field that has made it economically feasible to consider the use of solar cells as an alternative energy source. There are numerous ecological benefits to the use of solar cell generated electricity. Information is presented that can be used by homeowners, architects, and builders, both to develop do-it-yourself systems and as a guide when dealing with professional installers. A special appendix of exercises is provided to give the reader more practice in estimating system requirements.

Laws, R.J.

1983-01-01T23:59:59.000Z

309

Thin film solar cell including a spatially modulated intrinsic layer  

SciTech Connect

One or more thin film solar cells in which the intrinsic layer of substantially amorphous semiconductor alloy material thereof includes at least a first band gap portion and a narrower band gap portion. The band gap of the intrinsic layer is spatially graded through a portion of the bulk thickness, said graded portion including a region removed from the intrinsic layer-dopant layer interfaces. The band gap of the intrinsic layer is always less than the band gap of the doped layers. The gradation of the intrinsic layer is effected such that the open circuit voltage and/or the fill factor of the one or plural solar cell structure is enhanced.

Guha, Subhendu (Troy, MI); Yang, Chi-Chung (Troy, MI); Ovshinsky, Stanford R. (Bloomfield Hills, MI)

1989-03-28T23:59:59.000Z

310

Numericl modeling of graded band gap CIGS solar cells  

DOE Green Energy (OSTI)

The high efficiency reported recently by NREL for CIGS solar cells demonstrates the potential of band gap grading in producing high efficiency thin film solar cells. In order to reap the full benefits of this design strategy, a clear understanding of the fundamental device physics of these structures is needed. The purpose of this paper is to examine the role grading of the band gap plays in achieving high conversion efficiencies. To aid in this examination, a detailed numerical device simulation program, ADEPT, is used.

Gray, J.L.; Lee, Youn Jung

1994-12-31T23:59:59.000Z

311

High-efficiency solar cells using HEM silicon  

DOE Green Energy (OSTI)

Developments in Heat Exchanger Method (HEM) technology for production of multicrystalline silicon ingot production have led to growth of larger ingots (55 cm square cross section) with lower costs and reliability in production. A single reusable crucible has been used to produce 18 multicrystalline 33 cm square cross section 40 kg ingots, and capability to produce 44 cm ingots has been demonstrated. Large area solar cells of 16.3% (42 cm{sup 2}) and 15.3% (100 cm{sup 2}) efficiency have been produced without optimization of the material production and the solar cell processing.

Khattak, C.P.; Schmid, F. [Crystal Systems, Inc., Salem, MA (United States); Schubert, W.K. [Sandia National Labs., Albuquerque, NM (United States)

1994-12-31T23:59:59.000Z

312

Process Development for High Voc CdTe Solar Cells  

DOE Green Energy (OSTI)

This is a cumulative and final report for Phases I, II and III of this NREL funded project (subcontract # XXL-5-44205-10). The main research activities of this project focused on the open-circuit voltage of the CdTe thin film solar cells. Although, thin film CdTe continues to be one of the leading materials for large-scale cost-effective production of photovoltaics, the efficiency of the CdTe solar cells have been stagnant for the last few years. This report describes and summarizes the results for this 3-year research project.

Ferekides, C. S.; Morel, D. L.

2011-05-01T23:59:59.000Z

313

SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Foundational Program to Solar Foundational Program to Advance Cell Efficiency to someone by E-mail Share SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Facebook Tweet about SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Twitter Bookmark SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Google Bookmark SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Delicious Rank SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Digg Find More places to share SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Competitive Awards Diversity in Science and Technology Advances National Clean Energy

314

Moon's Radiation Environment and Expected Performance of Solar Cells during Future Lunar Missions  

E-Print Network (OSTI)

Several lunar missions are planned ahead and there is an increasing demand for efficient photovoltaic power generation in the moon. The knowledge of solar cell operation in the lunar surface obtained during early seventies need to be updated considering current views on solar variability and emerging space solar cell technologies. In this paper some aspects of the solar cell performance expected under variable lunar radiation environment during future space missions to moon are addressed. We have calculated relative power expected from different types of solar cells under extreme solar proton irradiation conditions and high lunar daytime temperature. It is also estimated that 2-3 % of annual solar cell degradation is most probable during the future lunar missions. We have also discussed photovoltaic power generation in long term lunar bases emphasizing technological needs such as sunlight concentration, solar cell cooling and magnetic shielding of radiation for improving the efficiency of solar cells in the lunar environment.

T. E Girish; S Aranya

2010-12-03T23:59:59.000Z

315

Enhancing solar cells with plasmonic nanovoids  

E-Print Network (OSTI)

in rotation-to-electricity conversion efficiencies through careful 3 1. Introduction Plant type LCOE (c/kWh) Gas 6.6 Hydro 8.6 Coal 9.5 Wind - Onshore 9.7 Geothermal 10.2 Biomass 11.3 Nuclear 11.4 Coal with CCS 13.6 Solar PV 21.1 Wind - Offshore 24.3 Solar... bill. 2 1.1 Motivation and context Coal and Peat 40.5% Oil 5.1% Natural gas 21.4% Nuclear 13.4% Hydro 16.2% Other 3.3% Figure 1.1: World electricity generation by source of energy. Other includes wind...

Lal, Niraj Narsey

2012-07-03T23:59:59.000Z

316

Substrate for thin silicon solar cells  

DOE Patents (OSTI)

A photovoltaic device for converting solar energy into electrical signals comprises a substrate, a layer of photoconductive semiconductor material grown on said substrate, wherein the substrate comprises an alloy of boron and silicon, the boron being present in a range of from 0.1 to 1.3 atomic percent, the alloy having a lattice constant substantially matched to that of the photoconductive semiconductor material and a resistivity of less than 1{times}10{sup {minus}3} ohm-cm. 4 figures.

Ciszek, T.F.

1995-03-28T23:59:59.000Z

317

Substrate for thin silicon solar cells  

DOE Patents (OSTI)

A photovoltaic device for converting solar energy into electrical signals comprises a substrate, a layer of photoconductive semiconductor material grown on said substrate, wherein the substrate comprises an alloy of boron and silicon, the boron being present in a range of from 0.1 to 1.3 atomic percent, the alloy having a lattice constant substantially matched to that of the photoconductive semiconductor material and a resistivity of less than 1.times.10.sup.-3 ohm-cm.

Ciszek, Theodore F. (Evergreen, CO)

1995-01-01T23:59:59.000Z

318

Back-Contact Crystalline-Silicon Solar Cells and Modules  

DOE Green Energy (OSTI)

This paper summarizes recent progress in the development of back-contact crystalline-silicon (c-Si) solar cells and modules at Sandia National Laboratories. Back-contact cells have potentially improved efficiencies through the elimination of grid obscuration and allow for significant simplifications in the module assembly process. Optimization of the process sequence has improved the efficiency of our back-contact cell (emitter wrap through) from around 12% to near 17% in the past 12 months. In addition, recent theoretical work has elucidated the device physics of emitter wrap-through cells. Finally, improvements in the assembly processing back-contact cells are described.

Bode, M.D.; Garrett, S.E.; Gee, J.M.; Jimeno, J.C.; Smith, D.D.

1999-03-10T23:59:59.000Z

319

Copper doped polycrystalline silicon solar cell  

DOE Patents (OSTI)

Photovoltaic cells having improved performance are fabricated from polycrystalline silicon containing copper segregated at the grain boundaries.

Lovelace, Alan M. Administrator of the National Aeronautics and Space (La Canada, CA); Koliwad, Krishna M. (La Canada, CA); Daud, Taher (La Crescenta, CA)

1981-01-01T23:59:59.000Z

320

Simulation and process development for ion-implanted N-type silicon solar cells .  

E-Print Network (OSTI)

??As the efficiency potential for the industrial P-type Al-BSF silicon solar cell reaches its limit, new solar cell technologies are required to continue the pursuit (more)

Ning, Steven

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Award-Winning Etching Process Cuts Solar Cell Costs (Revised) (Fact Sheet)  

DOE Green Energy (OSTI)

The NREL "black silicon" nanocatalytic wet-chemical etch is an inexpensive, one-step method to minimize reflections from crystalline silicon solar cells. The technology enables high-efficiency solar cells without the use of expensive antireflection coatings.

Not Available

2011-05-01T23:59:59.000Z

322

Project Eagle Phase 1 Direct Wafer/Cell Solar Facility  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Project Eagle Phase 1 Direct Wafer/Cell Solar Facility Project Eagle Phase 1 Direct Wafer/Cell Solar Facility 1366 Technologies Description of Proposed Action: The Department of Energy (DOE) proposed action is for the use of a federal loan guarantee by 1366 Technologies (1366) to support the renovation of an existing building, located at 159 Wells Avenue, Newton, Massachusetts, into a solar wafer production facility. The new facility would constitute Phase 1 of Project Eagle and accommodate 20 megawatts (MW) of multi crystalline silicon wafer production, laboratory areas, offices, and ancillary spaces. Phase 2 of Proje~y an existing DOE Categorical Exclusion and would occur at a site in _ _ _ _ . The Phase 1 facility in Newton, MA is an existing building of 50,600 square feet on a site approximately 4.7 acres. 1366 would renovate the interior of the facility to provide office

323

INCREASED CELL EFFICIENCY IN InGaAs THIN FILM SOLAR CELLS WITH DIELECTRIC AND METAL BACK REFLECTORS  

E-Print Network (OSTI)

solar cells enable very high photovoltaic efficiencies by virtue of employing different band gap to increase the short circuit current and the photovoltaic efficiency of solar cells. INTRODUCTION Multi-junction solar cells based on III-V compound semiconductors are the most efficient photovoltaic devic- es

Heaton, Thomas H.

324

Manufacturing-Friendly Advance Seen in CIGS Solar Cell Processing (Fact Sheet)  

SciTech Connect

Scientists developed a robust, high-performance amorphous InZnO transparent contact for CIGS solar cells.

Not Available

2011-05-01T23:59:59.000Z

325

Survey of Development of CZTS-based Thin Film Solar Cells  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2013 TMS Annual Meeting & Exhibition. Symposium , Alloys and Compounds for Thermoelectric and Solar Cell Applications.

326

Performance Limitations of mc-Si Solar Cells Caused by Defect Clusters: Preprint  

DOE Green Energy (OSTI)

This paper presents a combination of numerical and experimental methods used to characterize defect clusters in multicrystalline silicon solar cells.

Sopori, B.; Rupnowski, P.; Mehta, V.; Budhraja, V.; Johnston, S.; Call, N.; Moutinho, H.; Al-Jassim, M.; Shaikh, A /; Seacrist, M.; Carlson, D.

2009-02-01T23:59:59.000Z

327

Unraveling the Role of Morphology on Organic Solar Cell Performance  

E-Print Network (OSTI)

Polymer based organic photovoltaic (OPV) technology offers a relatively inexpensive option for solar energy conversion provided its efficiency increases beyond the current level (6-7%) along with significant improvements in operational lifetime. The critical aspect of such solar cells is the complex morphology of distributed bulk heterojunctions, which plays the central role in the conversion of photo-generated excitons to electron-hole pairs. However, the fabrication conditions that can produce the optimal morphology are still unknown due to the lack of quantitative understanding of the effects of process variables on the cell morphology. In this article, we develop a unique process-device co-simulation framework based on phase-field model for phase separation coupled with self-consistent drift-diffusion transport to quantitatively explore the effects of the process conditions (e.g., annealing temperature, mixing ratio, anneal duration) on the organic solar cell performance. Our results explain experimentally observed trends of open circuit voltage and short circuit current that would otherwise be deemed anomalous from the perspective of conventional solar cells. In addition to providing an optimization framework for OPV technology, our morphology-aware modeling approach is ideally suited for a wide class of problems involving porous materials, block co-polymers, polymer colloids, OLED devices etc.

Biswajit Ray; Pradeep R. Nair; Muhammad A. Alam

2010-11-03T23:59:59.000Z

328

Modelling and fabrication of high-efficiency silicon solar cells  

DOE Green Energy (OSTI)

This report covers the research conducted on modelling and development of high-efficiency silicon solar cells during the period May 1989 to August 1990. First, considerable effort was devoted toward developing a ray-tracing program for the photovoltaic community to quantify and optimize surface texturing for solar cells. Second, attempts were made to develop a hydrodynamic model for device simulation. Such a model is somewhat slower than drift-diffusion type models like PC-1D, but it can account for more physical phenomena in the device, such as hot carrier effects, temperature gradients, thermal diffusion, and lattice heat flow. In addition, Fermi-Dirac statistics have been incorporated into the model to deal with heavy doping effects more accurately. Third and final component of the research includes development of silicon cell fabrication capabilities and fabrication of high-efficiency silicon cells. 84 refs., 46 figs., 10 tabs.

Rohatgi, A.; Smith, A.W.; Salami, J. [Georgia Inst. of Tech., Atlanta, GA (United States). School of Electrical Engineering] [Georgia Inst. of Tech., Atlanta, GA (United States). School of Electrical Engineering

1991-10-01T23:59:59.000Z

329

Segmented dish concentrator design project. [For solar cells  

SciTech Connect

The module uses a non-imaging thermoformed reflector consisting of tiers of conical reflecting surfaces sealed to a curved window which seals the mirror surfaces and the solar cells from the environment. A reflective coating is applied after the module is formed to the inside of the curved surfaces. Coatings of aluminum, silver, and copper were used. The receiver is a hexagonal prism machined on the surface of a metal pipe with the hexagonal shape around the circumference. The receiver holds 18, 2x2 cm. 40X solar cells. Three cells are mounted on each face of the six faces and can be wired in series or series-parallel. The cells are individually soldered to molybdenum with a tab for the back electrical connection. The molybdenum-solar cell combination is mounted to the heat sink with silicon rubber impregnated with powdered silicon. This provides an electrically insulating medium with reasonable thermally conductive properties. The hexagonal heat sink is inserted into the module from the rear, extending far enough into the module to intercept the light reflected from the conical tiers. Each tier illuminates the entire cell surface with the 5 tiers adding together to yield 40X concentration. Water flows inside the heat sink to dissipate the heat generated by the module. Electrical leads, water lines, and thermocouple wires are fed through the back and sealed to prevent environmental interference with the inner surfaces of the module. The module was tested at The University of Arizona. For the silver coated module, an overall efficiency of 7.6% was obtained with an input of 346 watts. Solar cell surface temperature was 50/sup 0/C. The cells were wired in series-parallel and a V/sub oc/ = 4 volts and an I/sub sc/ = 9.2 A was obtained. Four modules were delivered to Sandia in March 1979.

Call, R.L.

1979-07-01T23:59:59.000Z

330

Optical system for determining physical characteristics of a solar cell  

DOE Patents (OSTI)

The invention provides an improved optical system for determining the physical characteristics of a solar cell. The system comprises a lamp means for projecting light in a wide solid-angle onto the surface of the cell; a chamber for receiving the light through an entrance port, the chamber having an interior light absorbing spherical surface, an exit port for receiving a beam of light reflected substantially normal to the cell, a cell support, and an lower aperture for releasing light into a light absorbing baffle; a means for dispersing the reflection into monochromatic components; a means for detecting an intensity of the components; and a means for reporting the determination.

Sopori, Bhushan L. (Denver, CO)

2001-01-01T23:59:59.000Z

331

ePOWER Seminar AC solar cells: A new breed of PV power generation  

E-Print Network (OSTI)

ePOWER Seminar AC solar cells: A new breed of PV power generation Professor Faisal Khan Assistant will provide a guideline for solar cell designers to fabricate various discrete components in a power converter-junction solar cells. Prof. Khan is the founder of the Power Engineering and Automation Research Lab (PEARL

Ellis, Randy

332

Solar cells conversion efficiency maximisation based on sol-gel method and front surface texturisation  

Science Conference Proceedings (OSTI)

This paper presents experiments and evaluations on a new silicon solar cell structure obtained by texturisation of the front surface using silicon micromachining technologies. The textured surface of the solar cell is made in order to reduce frontal ... Keywords: light trapping, micromachining, silicon, sol-gel method, solar cells, texturisation

Lucian Milea; Orest Oltu; Claudius Teodorescu; Verona Muntean; Marius Stoian

2008-07-01T23:59:59.000Z

333

Enhanced Photovoltaic Performance of Nanostructured Hybrid Solar Cell Using Highly Oriented TiO2 Nanotubes  

E-Print Network (OSTI)

Enhanced Photovoltaic Performance of Nanostructured Hybrid Solar Cell Using Highly Oriented TiO2 nanotubes can be effectively controlled for the suitable use for a hybrid solar cell by varying the diameter nanotubes to form hybrid solar cells. The open circuit voltage, short circuit current density, fill factor

Cao, Guozhong

334

IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 2, APRIL 2012 123 Gallium Arsenide Solar Cell Absorption  

E-Print Network (OSTI)

IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 2, APRIL 2012 123 Gallium Arsenide Solar Cell Absorption flat gallium arsenide solar cell, we show that it is possible to modify the flow of light and enhance above the solar cell. The incoupling element is lossless and, thus, has the advantage that no energy

Grandidier, Jonathan

335

Multiscale Models of Quantum Dot Based Nanomaterials and Nanodevices for Solar Cells  

Science Conference Proceedings (OSTI)

NASA future exploration missions and space electronic equipment require improvements in solar cell efficiency and radiation hardness. Novel nano-engineered materials and quantum-dot (QD) based photovoltaic devices promise to deliver more efficient, lightweight, ... Keywords: Nanostructured solar cell, computer-aided design, drift-diffusion, hydrodynamics, intermediate band solar cells, multiscale, nanostructures, photovoltaic, quantum dot

Alexander I. Fedoseyev; Marek Turowski; Ashok Raman; Qinghui Shao; Alexander A. Balandin

2008-06-01T23:59:59.000Z

336

SOLAR CELL BASED PYRANOMETERS: EVALUATION OF THE DIFFUSE RESPONSE Frank Vignola  

E-Print Network (OSTI)

260 SOLAR CELL BASED PYRANOMETERS: EVALUATION OF THE DIFFUSE RESPONSE Frank Vignola Department The responsivity to diffuse radiation of a solar cell based pyranometer is studied. Diffuse measurements are made of the LiCor pyranometer is presented. Implication of the spectral dependence of the solar cell based

Oregon, University of

337

High Excitation Transfer Efficiency from Energy Relay Dyes in Dye-Sensitized Solar Cells  

E-Print Network (OSTI)

High Excitation Transfer Efficiency from Energy Relay Dyes in Dye-Sensitized Solar Cells Brian E soluble energy relay dyes with high molar extinction coefficients. KEYWORDS Solar cell, energy transfer-sensitized solar cells, the excited ERDs must be able to efficiently transfer energy to the sensitizing dyes

McGehee, Michael

338

Tandem Polymer Solar Cells Featuring a Spectrally Matched Low-Bandgap Polymer  

SciTech Connect

Tandem solar cells provide an effective way to harvest a broader spectrum of solar radiation by combining two or more solar cells with different absorption bands. However, for polymer solar cells, the performance of tandem devices lags behind single-layer solar cells mainly due to the lack of a suitable low-bandgap polymer. Here, we demonstrate highly efficient single and tandem polymer solar cells featuring a low-bandgap conjugated polymer (PBDTT-DPP: bandgap, {approx}1.44 eV). A single-layer device based on the polymer provides a power conversion efficiency of {approx}6%. When the polymer is applied to tandem solar cells, a power conversion efficiency of 8.62% is achieved, which is, to the best of our knowledge, the highest certified efficiency for a polymer solar cell to date.

Dou, L.; You, J.; Yang, J.; Chen, C. C.; He, Y.; Murase, S.; Moriarty, T.; Emery, K.; Li, G.; Yang, Y.

2012-03-01T23:59:59.000Z

339

Development Efforts on Silicon Solar Cells  

Science Conference Proceedings (OSTI)

A stable, high-efficiency photovoltaic cell technology was developed for use in advanced systems that generate electricity from highly concentrated sunlight.

1992-02-01T23:59:59.000Z

340

Cost-Effective Replacement for Iodide in Dye-Sensitized Solar Cells  

Dye-sensitized solar cells (DSSCs) are used to create electrical energy from sunlight. The cell has three components: the cathode, the photoanode, and ...

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Integration of High Efficiency Solar Cells on Carriers for Concentrating System Applications .  

E-Print Network (OSTI)

??High efficiency multi-junction (MJ) solar cells were packaged onto receiver systems. The efficiency change of concentrator cells under continuous high intensity illumination was done. Also, (more)

Chow, Simon Ka Ming

2011-01-01T23:59:59.000Z

342

Improved Electrodes and Electrolytes for Dye-Based Solar Cells  

SciTech Connect

The most important factor in limiting the stability of dye-sensitized solar cells is the use of volatile liquid solvents in the electrolytes, which causes leakage during extended operation especially at elevated temperatures. This, together with the necessary complex sealing of the cells, seriously hampers the industrial-scale manufacturing and commercialization feasibilities of DSSCs. The objective of this program was to bring about a significant improvement in the performance and longevity of dye-based solar cells leading to commercialization. This had been studied in two ways first through development of low volatility solid, gel or liquid electrolytes, second through design and fabrication of TiO2 sculptured thin film electrodes.

Harry R. Allcock; Thomas E. Mallouk; Mark W. Horn

2011-10-26T23:59:59.000Z

343

Polycrystalline Thin-Film Multijunction Solar Cells  

DOE Green Energy (OSTI)

We present a digest of our research on the thin-film material components that comprise the top and bottom cells of three different material systems and the tandem devices constructed from them.

Noufi, R.; Wu, X.; Abu-Shama, J.; Ramanathan, K; Dhere, R.; Zhou, J.; Coutts, T.; Contreras, M.; Gessert, T.; Ward, J. S.

2005-11-01T23:59:59.000Z

344

Transparent Conductors and Barrier Layers for Thin Film Solar Cells:  

DOE Green Energy (OSTI)

This report describes the research undertaken to increase the efficiency of thin-film solar cells based on amorphous silicon in the so-called''superstrate structure'' (glass front surface/transparent electrically conductive oxide (TCO)/pin amorphous silicon/metal back electrode). The TCO layer must meet many requirements: high optical transparency in the wavelength region from about 350 to 900 nm, low electrical sheet resistance, stability during handling and deposition of the subsequent layers and during use, a textured (rough) surface to enhance optical absorption of red and near-infrared light, and low-resistance electrical contact to the amorphous silicon p-layer. Fluorine-doped tin oxide has been the TCO used in most commercial superstrate amorphous silicon cells. Fluorine-doped zinc oxide (ZnO:F) was later shown to be even more transparent than fluorine-doped tin oxide, as well as being more resistant to the strongly reducing conditions encountered during the deposition of amorphous silicon. Solar cells based on ZnO:F showed the expected higher currents, but the fill factors were lower than standard cells grown on tin oxide, resulting in no consistent improvement in efficiency. This problem was recently mitigated by using a new proprietary p/buffer layer combination developed at BP Solar.

Gordon, R. G.; Broomhall-Dillard, R.; Liu, X.; Pang, D.; Barton, J.

2001-12-01T23:59:59.000Z

345

The effects of concentrated ultraviolet light on high-efficiency silicon solar cells  

DOE Green Energy (OSTI)

The importance of stability in the performance of solar cells is clearly recognized as fundamental. Some of the highest efficiency silicon solar cells demonstrated to date, such as the Point Contact solar cell and the Passivated Emitter solar cell, rely upon the passivation of cell surfaces in order to minimize recombination, which reduces cell power output. Recently, it has been shown that exposure to ultraviolet (UV) light of wavelengths present in the terrestrial solar spectrum can damage a passivating silicon-oxide interface and increase recombination. In this study, we compared the performance of Point Contact and Passivated Emitter solar cells after exposure to UV light. We also examined the effect of UV exposure on oxide-passivated silicon wafers. We found that current Passivated Emitter designs are stable at both one-sun and under concentrated sunlight. The evolution of Point Contact concentrator cell performance shows a clear trend towards more stable cells. 15 refs., 18 figs.

Ruby, D.S.; Schubert, W.K.

1991-01-01T23:59:59.000Z

346

Thermodynamics, Entropy, Information and the Efficiency of Solar Cells  

E-Print Network (OSTI)

Steinborn, Exergy of solar radiation: information approach.detailed in Chapter II. Solar radiation is split into athe spectrum of the solar radiation. The first is the data-

Abrams, Zeev R.

2012-01-01T23:59:59.000Z

347

Engineering the Electronic Band Structure for Multiband Solar Cells  

E-Print Network (OSTI)

crucial part of the solar spectrum. The performance of thebetter utilization of the full solar spectrum could be alsostructures obtained under solar spectrum illumination with

Lopez, N.

2011-01-01T23:59:59.000Z

348

Assembly and characterization of colloid-based antireflective coatings on multicrystalline silicon solar cells  

E-Print Network (OSTI)

the centerpoint of the solar cell samples. At that distance, the intensity of the light source was mapped, the light source employed for this study was less energetic than solar energy fluxes, which are in the rangeN-coated and uncoated solar cells. We also thank Greg Parsons for the use of a light meter, Dale Bachelor for assistance

Velev, Orlin D.

349

Exact solution for excess electrons in quantum mechanically operating solar cells, under cumulative Auger effects  

Science Conference Proceedings (OSTI)

We derive excess carrier populations in quantum wells, embedded in the intrinsic region of p-i-n solar cells. In the process of the analysis, we (a) solve for photo-generated carriers in quantum wells and (b) determine explicit dependence on incident ... Keywords: Auger recombination, material growth, quantum photovoltaics, quantum wells, solar cells, solar spectrum

Argyrios Varonides; Robert Spalletta; Andrew Berger

2007-07-01T23:59:59.000Z

350

Demo: Organic Solar Cell-equipped Energy Harvesting Active Networked Tag (EnHANT) Prototypes  

E-Print Network (OSTI)

Demo: Organic Solar Cell-equipped Energy Harvesting Active Networked Tag (EnHANT) Prototypes Gerald their communications and networking parameters to the available environmental energy harvested by the organic solar harvesting, organic solar cells, ultra-low-power com- munications, ultra-wideband impulse radio, energy

Carloni, Luca

351

Alan J. Heeger, Conductive Polymers, and Plastic Solar Cells  

Office of Scientific and Technical Information (OSTI)

Alan J. Heeger, Conductive Polymers, and Plastic Solar Cells Alan J. Heeger, Conductive Polymers, and Plastic Solar Cells Resources with Additional Information · Patents · Videos After receiving 'his physics Ph.D. at the University of California at Berkeley in 1961, [Alan J.] Heeger would spend the next 20 years teaching the subject at the University of Pennsylvania - while also designing and then launching one of the nation's premiere scientific think tanks: the Laboratory for Research on the Structure of Matter. Alan J. Heeger Courtesy of Randy Lamb, UCSB It was there in the Penn experimental lab, during the fall and early winter of 1976, that Heeger and two colleagues would first begin to explore the possibility of manipulating "long chains of polymers" with an eye to "altering their properties" so that they could be coaxed into conducting electricity.'1

352

Methods for improving solar cell open circuit voltage  

DOE Patents (OSTI)

A method for producing a solar cell having an increased open circuit voltage. A layer of cadmium sulfide (CdS) produced by a chemical spray technique and having residual chlorides is exposed to a flow of hydrogen sulfide (H.sub.2 S) heated to a temperature of 400.degree.-600.degree. C. The residual chlorides are reduced and any remaining CdCl.sub.2 is converted to CdS. A heterojunction is formed over the CdS and electrodes are formed. Application of chromium as the positive electrode results in a further increase in the open circuit voltage available from the H.sub.2 S-treated solar cell.

Jordan, John F. (El Paso, TX); Singh, Vijay P. (El Paso, TX)

1979-01-01T23:59:59.000Z

353

Design for the fabrication of high efficiency solar cells  

DOE Patents (OSTI)

A method and apparatus for a photo-active region for generation of free carriers when a first surface is exposed to optical radiation. The photo-active region includes a conducting transparent matrix and clusters of semiconductor materials embedded within the conducting transparent matrix. The clusters are arranged in the matrix material so as to define at least a first distribution of cluster sizes ranging from those with the highest bandgap energy near a light incident surface of the photo-active region to those with the smallest bandgap energy near an opposite second surface of the photo-active region. Also disclosed is a method and apparatus for a solar cell. The solar cell includes a photo-active region containing a plurality of semiconductor clusters of varying sizes as described.

Simmons, Joseph H. (Gainesville, FL)

1998-01-01T23:59:59.000Z

354

Semiconductor Quantum Dots and Quantum Dot Arrays and Applications of Multiple Exciton Generation to Third-Generation Photovoltaic Solar Cells  

E-Print Network (OSTI)

to Third-Generation Photovoltaic Solar Cells A. J. Nozik,*,, M. C. Beard, J. M. Luther, M. Law,§ R. J. Applications: Quantum Dot Solar Cells 6884 6.1. Quantum Dot Solar Cell Configurations 6885 6.1.1. Photoelectrodes Composed of Quantum Dot Arrays 6885 6.1.2. Quantum Dot-Sensitized Nanocrystalline TiO2 Solar Cells

George, Steven C.

355

Lithographic antennas for enhancement of solar cell efficiency  

DOE Green Energy (OSTI)

This report documents proof-of-concept demonstration of the use of lithographic antennas for enhancement of solar-cell efficiency. A micro-sized lithographic antenna array was theoretically modeled, designed and fabricated. Experimental research was performed to validate the ability of the antenna array to concentrate infrared and visible energy onto photovoltaic (PV) materials. The research will serve as the basis for the design of a miniature power source for remote sensors.

Kotter, D.K. [Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States); Boreman, G. [Univ. of Central Florida, Orlando, FL (United States). Center for Research and Education in Optics and Lasers

1998-04-01T23:59:59.000Z

356

Junction Transport in Epitaxial Film Silicon Heterojunction Solar Cells: Preprint  

Science Conference Proceedings (OSTI)

We report our progress toward low-temperature HWCVD epitaxial film silicon solar cells on inexpensive seed layers, with a focus on the junction transport physics exhibited by our devices. Heterojunctions of i/p hydrogenated amorphous Si (a-Si) on our n-type epitaxial crystal Si on n++ Si wafers show space-charge-region recombination, tunneling or diffusive transport depending on both epitaxial Si quality and the applied forward voltage.

Young, D. L.; Li, J. V.; Teplin, C. W.; Stradins, P.; Branz, H. M.

2011-07-01T23:59:59.000Z

357

Gas fixation solar cell using gas diffusion semiconductor electrode  

SciTech Connect

A gas diffusion semiconductor electrode and solar cell and a process for gaseous fixation, such as nitrogen photoreduction, CO/sub 2/ photoreduction and fuel gas photo-oxidation are described. The gas diffusion photosensitive electrode has a central electrolyte porous matrix with an activated semiconductor material on one side adapted to be in contact with an electrolyte and a hydrophobic gas diffusion region on the opposite side adapted to be in contact with a supply of molecular gas.

Ang, P.G.; Sammells, A.F.

1980-12-23T23:59:59.000Z

358

On Quantum Coherence Effects in Photo and Solar Cells  

E-Print Network (OSTI)

We show that quantum coherence can increase the quantum efficiency of various thermodynamic systems. For example, we can enhance the quantum efficiency for a quantum dot photocell, a laser based solar cell and the photo-Carnot quantum heat engine. Our results are fully consistent with the laws of thermodynamics contrary to comments found in the paper of A.P. Kirk, Phys. Rev. Lett. 106, 048703 (2011).

Kimberly Chapin; Konstantin Dorfman; Anatoly Svidzinsky; Marlan Scully

2010-12-23T23:59:59.000Z

359

Encapsulant Material For Solar Cell Module And Laminated Glass Applications  

SciTech Connect

An encapsulant material includes a layer of metallocene polyethylene disposed between two layers of an acid copolymer of polyethylene. More specifically, the layer of metallocene polyethylene is disposed adjacent a rear surface of the first layer of the acid copolymer of polyethylene, and a second layer of the acid copolymer of polyethlene is disposed adjacent a rear surface of the layer of metallocene polyethylene. The encapsulant material can be used in solar cell module and laminated glass applications.

Hanoka, Jack I. (Brookline, MA); Klemchuk, Peter P. (Watertown, CT)

2001-02-13T23:59:59.000Z

360

RECOVERY ACT: MULTIMODAL IMAGING FOR SOLAR CELL MICROCRACK DETECTION  

DOE Green Energy (OSTI)

Undetected microcracks in solar cells are a principal cause of failure in service due to subsequent weather exposure, mechanical flexing or diurnal temperature cycles. Existing methods have not been able to detect cracks early enough in the production cycle to prevent inadvertent shipment to customers. This program, sponsored under the DOE Photovoltaic Supply Chain and Cross-Cutting Technologies program, studied the feasibility of quantifying surface micro-discontinuities by use of a novel technique, thermoreflectance imaging, to detect surface temperature gradients with very high spatial resolution, in combination with a suite of conventional imaging methods such as electroluminescence. The project carried out laboratory tests together with computational image analyses using sample solar cells with known defects supplied by industry sources or DOE National Labs. Quantitative comparisons between the effectiveness of the new technique and conventional methods were determined in terms of the smallest detectable crack. Also the robustness of the new technique for reliable microcrack detection was determined at various stages of processing such as before and after antireflectance treatments. An overall assessment is that the new technique compares favorably with existing methods such as lock-in thermography or ultrasonics. The project was 100% completed in Sept, 2010. A detailed report of key findings from this program was published as: Q.Zhou, X.Hu, K.Al-Hemyari, K.McCarthy, L.Domash and J.Hudgings, High spatial resolution characterization of silicon solar cells using thermoreflectance imaging, J. Appl. Phys, 110, 053108 (2011).

Janice Hudgings; Lawrence Domash

2012-02-08T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Amorphous silicon cell array powered solar tracking apparatus  

DOE Patents (OSTI)

An array of an even number of amorphous silicon solar cells are serially connected between first and second terminals of opposite polarity. The terminals are connected to one input terminal of a DC motor whose other input terminal is connected to the mid-cell of the serial array. Vane elements are adjacent the end cells to selectively shadow one or the other of the end cells when the array is oriented from a desired attitude relative to the sun. The shadowing of one cell of a group of cells on one side of the mid-cell reduces the power of that group substantially so that full power from the group of cells on the other side of the mid-cell drives the motor to reorient the array to the desired attitude. The cell groups each have a full power output at the power rating of the motor. When the array is at the desired attitude the power output of the two groups of cells balances due to their opposite polarity so that the motor remains unpowered.

Hanak, Joseph J. (Lawrenceville, NJ)

1985-01-01T23:59:59.000Z

362

Low-cost selective deposition of wax onto textured solar cells  

E-Print Network (OSTI)

The active regions of a solar cell must be inoculated with wax, while leaving the metal fingers and bus bars bare, in preparation for the electroplating step of a new solar panel manufacturing process. Different methods ...

Pez, Daan

2008-01-01T23:59:59.000Z

363

Direct coupling of solar cell arrays to electric power networks  

SciTech Connect

Results of an investigation of the performance of solar cells when directly coupled to a conventional three-phase power network are presented. This approach dissociates the electricity production problem from the electric energy storage problem. Extensive studies of the required power inverter are performed. Preliminary simulation results indicate that a.c. power outputs of better than 90 percent of the optimum cell power output can be easily achieved by means of a suitably controlled inverter. It is also shown that the controlling policy for the inverter must depend on the operating conditions of the system.

Alvarado, F.L.; Eltimsahy, A.H.

1976-01-01T23:59:59.000Z

364

NREL Produces Highly Efficient, Wide-Bandgap, Thin-Film Solar Cells (Fact Sheet)  

Science Conference Proceedings (OSTI)

Researchers at the National Renewable Energy Laboratory (NREL) are finding new ways to manufacture thin-film solar cells made from copper, indium, gallium, and selenium - called CIGS cells - that are different than conventional CIGS solar cells. Their use of high-temperature glass, designed by SCHOTT AG, allows higher fabrication temperatures, opening the door to new CIGS solar cells employing light-absorbing materials with wide 'bandgaps.'

Not Available

2012-09-01T23:59:59.000Z

365

NREL: News Feature - Solar Cells Light Up Prison Cells on 'The Rock'  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Cells Light Up Prison Cells on 'The Rock' Solar Cells Light Up Prison Cells on 'The Rock' July 23, 2012 This photo shows an island in the middle of blue sea water, with industrial buildings taking up a good deal of the island. The 1,300 solar panels on the Cellhouse building are a dark blue. Enlarge image Alcatraz Island in San Francisco Bay is referred to as "The Rock" and was home to a notorious prison for 75 years. NREL recently helped the National Park Service and the DOE Federal Energy Management Program transform the island's electricity source from diesel fuel to photovoltaic panels on the rooftop of the Cellhouse building. Courtesy of the National Park Service "Machine Gun Kelly," Al Capone, the "Birdman" - Alcatraz prison has had some infamous residents on the craggy island known as "The Rock" in the

366

High Rate Laser Pitting Technique for Solar Cell Texturing  

SciTech Connect

High rate laser pitting technique for solar cell texturing Efficiency of crystalline silicon solar cells can be improved by creating a texture on the surface to increase optical absorption. Different techniques have been developed for texturing, with the current state-of-the-art (SOA) being wet chemical etching. The process has poor optical performance, produces surfaces that are difficult to passivate or contact and is relatively expensive due to the use of hazardous chemicals. This project shall develop an alternative process for texturing mc-Si using laser micromachining. It will have the following features compared to the current SOA texturing process: -Superior optical surfaces for reduced front-surface reflection and enhanced optical absorption in thin mc-Si substrates -Improved surface passivation -More easily integrated into advanced back-contact cell concepts -Reduced use of hazardous chemicals and waste treatment -Similar or lower cost The process is based on laser pitting. The objective is to develop and demonstrate a high rate laser pitting process which will exceed the rate of former laser texturing processes by a factor of ten. The laser and scanning technologies will be demonstrated on a laboratory scale, but will use inherently technologies that can easily be scaled to production rates. The drastic increase in process velocity is required for the process to be implemented as an in-line process in PV manufacturing. The project includes laser process development, development of advanced optical systems for beam manipulation and cell reflectivity and efficiency testing. An improvement of over 0.5% absolute in efficiency is anticipated after laser-based texturing. The surface textures will be characterized optically, and solar cells will be fabricated with the new laser texturing to ensure that the new process is compatible with high-efficiency cell processing. The result will be demonstration of a prototype process that is suitable for scale-up to a production tool and process. The developed technique will have an reducing impact on product pricing. As efficiency has a substantial impact on the economics of solar cell production due to the high material cost content; in essence, improved efficiency through cost-effective texturing reduces the material cost component since the product is priced in terms of $/W. The project is a collaboration between Fraunhofer USA, Inc. and a c-Si PV manufacturer.

Hans J. Herfurth; Henrikki Pantsar

2013-01-10T23:59:59.000Z

367

III-V/Silicon Lattice-Matched Tandem Solar Cells  

DOE Green Energy (OSTI)

A two-junction device consisting of a 1.7-eV GaNPAs junction on a 1.1-eV silicon junction has the theoretical potential to achieve nearly optimal efficiency for a two-junction tandem cell. We have demonstrated a monolithic III-V-on-silicon tandem solar cell in which most of the III-V layers are nearly lattice-matched to the silicon substrate. The cell includes a GaNPAs top cell, a GaP-based tunnel junction (TJ), and a diffused silicon junction formed during the epitaxial growth of GaNP on the silicon substrate. To accomplish this, we have developed techniques for the growth of high crystalline quality lattice-matched GaNPAs on silicon by metal-organic vapor-phase epitaxy.

Geisz, J.; Olson, J.; Friedman, D.; Kurtz, S.; McMahon, W.; Romero, M.; Reedy, R.; Jones, K.; Norman, A.; Duda, A.; Kibbler, A.; Kramer, C.; Young, M.

2005-01-01T23:59:59.000Z

368

Studies of basic mechanisms influencing solar-cell efficiency for terrestrial applications  

DOE Green Energy (OSTI)

The research activities include determination of the basic mechanisms that control and limit solar-cell efficiency, engineering design of solar cells, and the improvement of cell design to increase the power conversion efficiency and to define the maximum efficiency expected from a given material technology. Experimental methods for determining the basic mechanisms in the highly-doped emitter region and for determining diffusion length and lifetime in the base region of p-n junction solar cells are discussed. The evolution of three different silicon solar cell structures proposed to yield efficiencies greater than 20% for illumination levels in the 25 to 100 sun range is discussed.

None

1978-01-01T23:59:59.000Z

369

Center punched solar cell module development effort. Final report  

SciTech Connect

The results of an advanced module development program with the objective of providing a low cost solar cell mechanical interconnect design are presented. The design approach, which avoids soldering or welding operations, lends itself to automated assembly techniques thus supporting the Low-Cost Silicon Solar Array Project goals. During the course of the program, a total of twelve modules were delivered to JPL for qualification testing. The first group of six modules contained aluminum contact cells and the second group of six modules contained silver-titanium-palladium contact cells. Extensive component and environmental testing by Xerox Electro-Optical Systems at the module level has shown that reliable cell mechanical interconnection can be achieved when utilizing the proper electrical contact materials and pressures. Environmental testing of XEOS modules at JPL, in accordance with the same JPL specification used by XEOS, will be performed and the results will be separately published. The module design, manufacturing procedure, test program, significant problem areas and solutions, and conclusions and recommendations as formulated and conducted by XEOS are discussed.

Ross, R.E.; Mortensen, W.E.

1978-06-01T23:59:59.000Z

370

Solar  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy (DOE) leads a large network of researchers and other partners to deliver innovative solar photovoltaic and concentrating solar power technologies that will make solar...

371

Front contact solar cell with formed electrically conducting layers on the front side and backside  

SciTech Connect

A bipolar solar cell includes a backside junction formed by a silicon substrate and a first doped layer of a first dopant type on the backside of the solar cell. A second doped layer of a second dopant type makes an electrical connection to the substrate from the front side of the solar cell. A first metal contact of a first electrical polarity electrically connects to the first doped layer on the backside of the solar cell, and a second metal contact of a second electrical polarity electrically connects to the second doped layer on the front side of the solar cell. An external electrical circuit may be electrically connected to the first and second metal contacts to be powered by the solar cell.

Cousins, Peter John

2012-06-26T23:59:59.000Z

372

Development and fabrication of advanced cover glass for a GaAs solar cell  

DOE Green Energy (OSTI)

This report summarizes work on improving solar cell conversion efficiencies by modifying the cell cover glass. Two approaches were investigated during the course of this work: grooved cover glasses to reduce the effect of top contact obscuration and secondary concentrators to improve concentrator solar cell performances in tracking modules. The grooved cover glass work used an array of metallized V shaped grooves in a thin cover glass (plastic) window to deflect incident light rays away from solar cell front surface regions covered by the solar cell electrical contact metallization onto unobstructed, optically active regions of the solar cell. Secondary concentrators are being considered for use on concentrator solar cells to improve overall system conversion efficiency and reduce receiver module cost. Secondary concentrators designed and fabricated during this project consist of small glass cones to attach directly to the top of the receiver solar cell. When appropriately designed, these secondary concentrator glass cones increase sunlight concentration on the solar cell, improve solar flux uniformity on the cell, improve system tolerance to tracking error, and allow for concentration ratios greater than can be ordinarily achieved with acrylic Fresnel lenses.

Borden, P.G.; Kaminar, N.R.; Grounner, M.

1984-01-01T23:59:59.000Z

373

HIGH EFFICIENCY BIFACIAL BACK SURFACE FIELD SOLAR CELLS  

E-Print Network (OSTI)

The first high efficiency p-n-n + bifacial solar cells are presented. Efficiencies of 15.7 % and 13.6 % were measured under front and back air mass one illumination respectively at 28 C. At 7 air mass one illumination and 28 C the front efficiency increases to 16.5%. A pilot production of 200 cells was made following a fabrication process as simple as that for conventional back surface field cells. Mean efficiencies of 13.4 % and 10.7 % were obtained under front and back illumination respectively. The production yield is higher than 80%. The advantages that bifacial cells present in some applications, compared with conventional cells, have been pointed out for static [1] and quasi-static [2] concentrating systems, for luminescent concentrators [3] and also for flat panels. A transistor-like structure (n+-p-n +) has already been developed as a bifacial cell [4]. We have also suggested [5] and theoretically analysed [6] the use of a back surface field (BSF) structure (n+-p-p or p+-n-n +) as a bifacial cell. The purpose here is to demonstrate the feasibility of high efficiency bifacial BSF solar cells. p+-n-n bifacial cells with a 5 cm 2 area were made on float-zone silicon wafers. The resistivity of the n-type base region was 10 ~2 cm and the thickness was 260 pm. The p and n + regions were formed by open-tube diffusions using BBr3 and POC13 sources, the resulting sheet resistance being 45- 60 ~2/[:] for the p layer and 20- 30 ~2/[:] for the n layer. A TiOx antireflection (AR) coating was spun onto both sides of the cell; Ti-Pd-Ag grids were sputtered and lift-off defined also on both faces. The metallization pattern was designed for the cells to operate inside static compound parabolic mirrors with a concentration factor of 5 and a non-uniform distribution of light intensity on the cell surface. The optimum grid has ten fingers per centimetre (each finger is 50- 70 pm wide) and produces a coverage factor in the illuminated area of about 5.5%.

A. Cuevas; A. Luque; J. Eguren; J. Del Alamo

1980-01-01T23:59:59.000Z

374

High Efficiency and High Rate Deposited Amorphous Silicon-Based Solar Cells  

E-Print Network (OSTI)

of a triple cell showing 10.7% stable efficiency. Figure 4-1 Schematic diagram of the Hot Wire CVD deposition. Task 7: High-rate deposition of a-Si based solar cells We have conducted extensive research using a hot1 High Efficiency and High Rate Deposited Amorphous Silicon-Based Solar Cells PHASE I Annual

Deng, Xunming

375

Fabrication and Characterization of Dye-Sensitized Solar Cell Using Blackberry Dye and Titanium Dioxide Nanocrystals  

Science Conference Proceedings (OSTI)

In this work, a prototype of dye-sensitized solar cell using organic dye from blackberry and semiconductor TiO2 nanocrystals was studied. The cell was fabricated using materials locally obtained in Indonesia (except the transparent conducting oxide glass), ... Keywords: dye-sensitized solar cell, blackberry dye, TiO2 nanocrystal

Stephen lourens Tanihaha; Henri P. Uranus; Jessie Darma

2010-12-01T23:59:59.000Z

376

High-Efficiency Solar Cells for Large-Scale Electricity Generation  

DOE Green Energy (OSTI)

One strategy for helping the solar industry to grow faster is to use very high efficiency cells under concentrating optics. By using lenses or mirrors to concentrate the light, very small solar cells can be used, reducing the amount of semiconductor material and allowing use of higher efficiency cells, which are now >40% efficient.

Kurtz, S.; Olson, J.; Geisz, J.; Friedman, D.; McMahon, W.; Ptak, A.; Wanlass, M.; Kibbler, A.; Kramer, C.; Bertness, K.; Ward, S.; Duda, A.; Young, M.; Carapella, J.; Steiner, M.

2008-09-26T23:59:59.000Z

377

Solar Cells Beyond Silicon Keld West, The Danish Polymer Centre, Ris National Laboratory, DK-4000  

E-Print Network (OSTI)

1 Solar Cells Beyond Silicon Keld West, The Danish Polymer Centre, Risø National Laboratory, DK of utilising solar energy, but this direct energy transfer does not involve the elements of focusing solar energy in a way that is economically competitive, also in regions where other energy sources

378

Materials Selection and Processing Techniques for Small Spacecraft Solar Cell Arrays.  

E-Print Network (OSTI)

??Body mounted germanium substrate solar cell arrays form the faces of many small satellite designs to provide the primary power source on orbit. High efficiency (more)

Torabi, Naseem M.

2013-01-01T23:59:59.000Z

379

Distribution of Oxygen in mc-Silicon Ingots for Solar Cell Applications  

Science Conference Proceedings (OSTI)

May 1, 2007 ... Distribution of Oxygen in mc-Silicon Ingots for Solar Cell Applications by Marisa Di Sabatino, Eivind J. vrelid, Espen Olsen, Thorvald A. Engh...

380

Evaluation of Four Imaging Techniques for the Electrical Characterization of Solar Cells (Presentation)  

DOE Green Energy (OSTI)

The imaging techniques enable the possibility of higher-level quality control and defect analysis of solar cell materials in in-line production processes.

Johnston. S.; Berman, G.; Call, N.; Ahrenkiel, R.

2008-12-03T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Characterization and Analysis of CIGS and CdTE Solar Cells: December 2004 - July 2008  

DOE Green Energy (OSTI)

The work reported here embodies a device-physics approach based on careful measurement and interpretation of data from CIGS and CdTe solar cells.

Sites, J. R.

2009-01-01T23:59:59.000Z

382

Investigation of the Role of Trap States in Solar Cell Reliability using Photothermal Deflection Spectroscopy  

E-Print Network (OSTI)

Second, solar power can be easily mounted on the rooftop ofsolar cells can be rolled out onto roofs or other surfaces, or used for rooftop

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

383

Nano-texturization for Light Trapping in Crystalline Silicon Solar Cells  

Science Conference Proceedings (OSTI)

Abstract Scope, To address the question whether random or periodic nanostructures lead to better light trapping in solar cells, we design and fabricate three...

384

Ampulse Raises $8 Million to Develop Low-Cost Solar Cells I  

Low-Cost Solar Cells In November 2009 Ampulse ... For consumers the benefits of using this appliance will vary depending on family size and hot

385

The Characterization of Micro-Channel Structure Poly Silicon Solar Cell Shaped by Laser Carving Technology  

E-Print Network (OSTI)

AbstractOn the increasing efficiency of solar cell manufacturing is a continuous challenge to the photovoltaic industry. This paper discusses using laser carving to shape circular micro channels on the surface of polycrystalline silicon solar cells in order to enhance their efficiency. According to the research findings, when the radius of circular-micro channels structure for 15?m, the efficiency of the solar cell is raised from 14.28 % to 15.78%. Detail features of efficiency and IV curve are also discussed. Index Termspoly silicon, solar cell, micro channel, laser carving I.

Liann B. Chang; Hsin C. Chen; Chao S. Lai; Chung W. Liao

2009-01-01T23:59:59.000Z

386

Advanced laser processing and photoluminescence characterisation of high efficiency silicon solar cells.  

E-Print Network (OSTI)

??Many current technologies used in solar cell fabrication have been successfully adapted from the integrated circuits industry. The success of laser processing applications in this (more)

Abbott, Malcolm David

2006-01-01T23:59:59.000Z

387

TiO2 Nanowire Solar Cells with Enhanced Energy Harvesting  

Science Conference Proceedings (OSTI)

Presentation Title, TiO2 Nanowire Solar Cells with Enhanced Energy Harvesting. Author(s), Anming Hu, John Wen, Y. Zhou. On-Site Speaker (Planned), Anming...

388

Better Internal Optics Can Improve III-V Solar Cell Performance...  

NLE Websites -- All DOE Office Websites (Extended Search)

that calculates external luminescent efficiency has potential to enhance performance of solar cells dominated by radiative recombination. Researchers at the National Renewable...

389

Scientists Confirm Robustness of Key Component in Ultra-High-Efficiency Solar Cell (Fact Sheet)  

DOE Green Energy (OSTI)

Scientists developed and tested a new, stable 1-eV metamorphic junction for a high efficiency multijunction III-V solar cell for CPV application.

Not Available

2011-05-01T23:59:59.000Z

390

Rare-earth doped up-converting phosphors for an enhanced silicon solar cell response.  

E-Print Network (OSTI)

??Photovoltaic solar cells can generate electricity directly from sunlight without emitting harmful greenhouse gases. This makes them ideal candidates as large scale future energy producers (more)

Shalav, Avi

2006-01-01T23:59:59.000Z

391

NREL Partnering with GreenVolts to Commercialize IMM Solar Cell  

NREL Partnering with GreenVolts to Commercialize IMM Solar Cell March 31, 2009. NREL is partnering with GreenVolts to commercialize the Inverted ...

392

Methods For Improving Polymeric Materials For Use In Solar Cell Applications  

DOE Patents (OSTI)

A method of manufacturing a solar cell module includes the use of low cost polymeric materials with improved mechanical properties. A transparent encapsulant layer is placed adjacent a rear surface of a front support layer. Interconnected solar cells are positioned adjacent a rear surface of the transparent encapsulant layer to form a solar cell assembly. A backskin layer is placed adjacent a rear surface of the solar cell assembly. At least one of the transparent encapsulant layer and the backskin layer are predisposed to electron beam radiation.

Hanoka, Jack I. (Brookline, MA)

2003-07-01T23:59:59.000Z

393

Methods For Improving Polymeric Materials For Use In Solar Cell Applications  

DOE Patents (OSTI)

A method of manufacturing a solar cell module includes the use of low cost polymeric materials with improved mechanical properties. A transparent encapsulant layer is placed adjacent a rear surface of a front support layer. Interconnected solar cells are positioned adjacent a rear surface of the transparent encapsulant layer to form a solar cell assembly. A backskin layer is placed adjacent a rear surface of the solar cell assembly. At least one of the transparent encapsulant layer and the backskin layer are predisposed to electron beam radiation.

Hanoka, Jack I. (Brookline, MA)

2001-11-20T23:59:59.000Z

394

Antireflection Coating Design for Series Interconnected Multi-Junction Solar Cells  

DOE Green Energy (OSTI)

AR coating design for multi-junction solar cells can be more challenging than in the single junction case. Reasons for this are discussed. Analytical expressions used to optimize AR coatings for single junction solar cells are extended for use in monolithic, series interconnected multi-junction solar cell AR coating design. The result is an analytical expression which relates the solar cell performance (through J{sub SC}) directly to the AR coating design through the device reflectance. It is also illustrated how AR coating design can be used to provide an additional degree of freedom for current matching multi-junction devices.

AIKEN,DANIEL J.

1999-11-29T23:59:59.000Z

395

Nanoscale photon management in silicon solar cells Sangmoo Jeong, Shuang Wang, and Yi Cui  

E-Print Network (OSTI)

-efficiency and highly stable a-Si:H solar cells deposited at high rate (8 ?/s) with disilane grading process J. Vac. Sci

Cui, Yi

396

Effect of DC to DC converters on organic solar cell arrays for powering DC loads .  

E-Print Network (OSTI)

??The objective of this research is to determine if it is possible to reduce the number of organic solar cells required to power a load (more)

Trotter, Matthew S.

2009-01-01T23:59:59.000Z

397

NREL: News Feature - New Solar Cell Is More Efficient, Less Costly  

NLE Websites -- All DOE Office Websites (Extended Search)

it comes to squeezing more efficiency and lower costs out of silicon, the workhorse of solar photovoltaic (PV) cells and modules worldwide. A recent breakthrough - the product...

398

Cost-Effective Replacement for Iodide in Dye-Sensitized Solar Cells  

Cost-Effective Replacement for Iodide in Dye-Sensitized Solar Cells Contact Information: Jeremy Nelson Phone: 970.491.7100 Email: jeremy.nelson@colostate.edu

399

Technique Reveals Critical Physics in Deep Regions of Solar Cells (Fact Sheet)  

SciTech Connect

NREL's improved time-resolved photoluminescence method measures minority-carrier lifetime deep within photovoltaic samples to help develop more efficient solar cells.

Not Available

2014-01-01T23:59:59.000Z

400

NREL Designs Promising New Oxides for Solar Cells (Fact Sheet)  

DOE Green Energy (OSTI)

High-efficiency, thin-film solar cells require electrical contacts with high electrical conductivity, and the top contact must also have high optical transparency. This need is currently met by transparent conducting oxides (TCOs), which conduct electricity but are 90% transparent to visible light. Scientists at the National Renewable Energy Laboratory (NREL) have derived three key design principles for selecting promising materials for TCO contacts. NREL's application of these design principles has resulted in a 10,000-fold improvement in conductivity for one TCO material.

Not Available

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Silicon-film{trademark} on ceramic solar cells. Final report  

DOE Green Energy (OSTI)

The Silicon-Film{trademark} design achieves high performance through the use of a thin silicon layer. Optimally designed thin crystalline solar cells (<50 microns thick) have performance advantages over conventional thick devices. The enhancement in performance requires the incorporation of back-surface passivation and light trapping. The high-performance Silicon-Film{trademark} design employs a metallurgical barrier between the low-cost substrate and the thin silicon layer. The properties of the metallurgical barrier must be engineered to implement specific device requirements, such as high back-surface reflectivity. Recent advances in process development are described here.

Hall, R.B.; Bacon, C.; DiReda, V.; Ford, D.H.; Ingram, A.E.; Lampo, S.M.; Rand, J.A.; Ruffins, T.R.; Barnett, A.M. [AstroPower, Inc., Newark, DE (United States)

1993-02-01T23:59:59.000Z

402

Ink Jet Printing Approaches to Solar Cell Contacts  

DOE Green Energy (OSTI)

We are developing inkjet printing as a low cost, high through-put approach to the deposition of front contacts for Si solar cells. High deposition rates of 1m per printing pass were achieved with a new metalorganic ink composed of silver (trifluoroacetate) in ethylene glycol. The printing conditions were optimized to achieve a relatively high line resolution of 120 m. The optimal parameters for the piezoelectric inkjet were a pulse frequency of 50 Hz and pulse amplitude of 25 V. The best resolution and the line quality were achieved at a substrate temperature of 180 C and drop separation of 40 m.

Kaydanova, T.; Miedaner, A.; Curtis, C.; Perkins, J.; Alleman, J.; Ginley, D.

2003-05-01T23:59:59.000Z

403

Solar cell structure incorporating a novel single crystal silicon material  

DOE Patents (OSTI)

A novel hydrogen rich single crystal silicon material having a band gap energy greater than 1.1 eV can be fabricated by forming an amorphous region of graded crystallinity in a body of single crystalline silicon and thereafter contacting the region with atomic hydrogen followed by pulsed laser annealing at a sufficient power and for a sufficient duration to recrystallize the region into single crystal silicon without out-gassing the hydrogen. The new material can be used to fabricate semiconductor devices such as single crystal silicon solar cells with surface window regions having a greater band gap energy than that of single crystal silicon without hydrogen.

Pankove, Jacques I. (Princeton, NJ); Wu, Chung P. (Trenton, NJ)

1983-01-01T23:59:59.000Z

404

New World Record Achieved in Solar Cell Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

World Record Achieved in Solar Cell Technology World Record Achieved in Solar Cell Technology New World Record Achieved in Solar Cell Technology December 5, 2006 - 9:34am Addthis New Solar Cell Breaks the "40 Percent Efficient" Sunlight-to-Electricity Barrier WASHINGTON, DC - U.S. Department of Energy (DOE) Assistant Secretary for Energy Efficiency and Renewable Energy Alexander Karsner today announced that with DOE funding, a concentrator solar cell produced by Boeing-Spectrolab has recently achieved a world-record conversion efficiency of 40.7 percent, establishing a new milestone in sunlight-to-electricity performance. This breakthrough may lead to systems with an installation cost of only $3 per watt, producing electricity at a cost of 8-10 cents per kilowatt/hour, making solar electricity a more cost-competitive and integral part of our nation's

405

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network (OSTI)

better matched to the solar spectrum has been used to solvea different part of the solar spectrum. The subcell with thetransparency to the solar spectrum. The latter is the

Shao, Qinghui

2009-01-01T23:59:59.000Z

406

Semitransparent ultrathin CdTe solar cells Semitransparent ultrathin CdTe solar cells and durabilityand durability  

E-Print Network (OSTI)

for Small Solar Photovoltaic (PV) Systems June 2012 First Edition #12;California Solar Permitting Guidebook2 California Solar Permitting Guidebook Improving Permit Review and Approval for Small Solar Photovoltaic (PV variety of permitting requirements for small solar photovoltaic (PV) installations throughout the state

Rollins, Andrew M.

407

NREL: News Feature - Super-Efficient Cells Key to Low-Cost Solar Power  

NLE Websites -- All DOE Office Websites (Extended Search)

Super-Efficient Cells Key to Low-Cost Solar Power Super-Efficient Cells Key to Low-Cost Solar Power February 16, 2011 This photo shows eight Amonix 7700 solar power generators, those in front tilted horizontally, those in the rear tilted near vertically. Each is a huge rectangle divided into hundreds of squares holding cells and lenses. Enlarge image The Amonix 7700 Concentrated Photovoltaic (CPV) Solar Power Generators are showcasing reliability and undergoing validation-of-performance measurements at the SolarTAC facility in Aurora, Colo. Credit: Dennis Schroeder In this photo, a man in an orange safety vest and hardhat is using a laptop, with large concentrated photovoltaic generators in the background. Enlarge image A technician at SolarTAC in Aurora, CO, enters some numbers into a laptop as he monitors validation of the Amonix 7700 Solar Power Generators.

408

Processing Iron Pyrite Nanocrystals for Use in Solar Cells ...  

Technology Marketing Summary For solar energy to become an economically viable energy source, alternative semiconductor materials to be used in solar ...

409

Highly Mismatched Alloys for Intermediate Band Solar Cells  

E-Print Network (OSTI)

edges span much of the solar spectrum, demonstrating thatthat fall within the solar energy spectrum, Zn 1-x Mn x O y

2005-01-01T23:59:59.000Z

410

Processes for producing low cost, high efficiency silicon solar cells  

SciTech Connect

Processes which utilize rapid thermal processing (RTP) are provided for inexpensively producing high efficiency silicon solar cells. The RTP processes preserve minority carrier bulk lifetime .tau. and permit selective adjustment of the depth of the diffused regions, including emitter and back surface field (bsf), within the silicon substrate. Silicon solar cell efficiencies of 16.9% have been achieved. In a first RTP process, an RTP step is utilized to simultaneously diffuse phosphorus and aluminum into the front and back surfaces, respectively, of a silicon substrate. Moreover, an in situ controlled cooling procedure preserves the carrier bulk lifetime .tau. and permits selective adjustment of the depth of the diffused regions. In a second RTP process, both simultaneous diffusion of the phosphorus and aluminum as well as annealing of the front and back contacts are accomplished during the RTP step. In a third RTP process, the RTP step accomplishes simultaneous diffusion of the phosphorus and aluminum, annealing of the contacts, and annealing of a double-layer antireflection/passivation coating SiN/SiO.sub.x.

Rohatgi, Ajeet (Marietta, GA); Chen, Zhizhang (Duluth, GA); Doshi, Parag (Atlanta, GA)

1996-01-01T23:59:59.000Z

411

Analysis of Solar Cell Quality Using Voltage Metrics: Preprint  

DOE Green Energy (OSTI)

The highest efficiency solar cells provide both excellent voltage and current. Of these, the open-circuit voltage (Voc) is more frequently viewed as an indicator of the material quality. However, since the Voc also depends on the band gap of the material, the difference between the band gap and the Voc is a better metric for comparing material quality of unlike materials. To take this one step further, since Voc also depends on the shape of the absorption edge, we propose to use the ultimate metric: the difference between the measured Voc and the Voc calculated from the external quantum efficiency using a detailed balance approach. This metric is less sensitive to changes in cell design and definition of band gap. The paper defines how to implement this metric and demonstrates how it can be useful in tracking improvements in Voc, especially as Voc approaches its theoretical maximum.

Toberer, E. S.; Tamboli, A. C.; Steiner, M.; Kurtz, S.

2012-06-01T23:59:59.000Z

412

Solar Energy Materials & Solar Cells 92 (2008) 821829 Modeling the optical properties of WO3 and WO3SiO2 thin films  

E-Print Network (OSTI)

Solar Energy Materials & Solar Cells 92 (2008) 821­829 Modeling the optical properties of WO3 the optical response of the films in the near-UV and visible region: two interband transitions for energies E

Thirumalai, Devarajan

413

Degradation of ITO/silicon solar cells. Final report  

DOE Green Energy (OSTI)

The research under this contract investigated the degradation mechanisms and projected lifetime of indium tin oxide (ITO/P-silicon) solar cells. Both single and polycrystalline silicon cells were investigated. Thermal degradation of the cells was shown to proceed by the growth of an interfacial SiO/sub 2/ which resulted from oxygen diffusion through the ITO. The growth of the interfacial SiO/sub 2/ causes reduction in fill factor but not V/sub oc/ or I/sub sc/ until the degradation is severe. While thermal degradation occurs, it proceeds very slowly at 50/sup 0/C and the cell efficiency is projected to remain above 50% of its original value for 10/sup 5/ years at this temperature. Cells subjected to illuminated load testing at room temperature for 840 hours showed no reduction in output. However, some changes were noted in the dark characteristics. The mechanism causing the change is not known. Preliminary noise spectral density reliability tests were conducted but the results were inconclusive.

Wilmsen, C.W. (ed.)

1978-01-01T23:59:59.000Z

414

Non-Linear Luminescent Coupling in Series-Connected Multijunction Solar Cells  

Science Conference Proceedings (OSTI)

The assumption of superposition or linearity of photocurrent with solar flux is widespread for calculations and measurements of solar cells. The well-known effect of luminescent coupling in multijunction solar cells has also been assumed to be linear with excess current. Here we show significant non-linearities in luminescent coupling in III-V multijunction solar cells and propose a simple model based on competition between radiative and nonradiative processes in the luminescent junction to explain these non-linearities. We demonstrate a technique for accurately measuring the junction photocurrents under a specified reference spectrum, that accounts for and quantifies luminescent coupling effects.

Steiner, M. A.; Geisz, J. F.

2012-06-18T23:59:59.000Z

415

p-Doping limit and donor compensation in CdTe polycrystalline thin film solar cells  

E-Print Network (OSTI)

everything accelerates. ARCO solar produces more than 1 MW PV cells in `80, being the first in the world, the Million Solar Roofs in the US, and many more. Besides these programs, the efficiency of CdTe thin film PV energy source is the photovoltaic (PV) cell, which converts sunlight to electrical current, without any

Bieber, Michael

416

Chance discovery and scenario analysis for trend exploration on solar cell technology  

Science Conference Proceedings (OSTI)

It is essential for managers and stakeholders to well understand the trends of a certain technology so that managers can enhance the performance of a company and stakeholders can make appropriate decisions for investment. Solar cell, one of renewable ... Keywords: chance discovery, knowledge extraction, knowledge retrieval, patent data, patents, scenario analysis, solar cells, technology trends, trend exploration

Tzu-Fu Chiu

2011-12-01T23:59:59.000Z

417

Glass diffusion source for constraining BSF region of a solar cell  

DOE Patents (OSTI)

The present invention is directed to a method of fabricating a solar cell comprising simultaneous diffusion of the p and n dopant materials into the solar cell substrate. The simultaneous diffusion process is preceded by deposition of a capping layer impervious to doping by thermal diffusion processes.

Lesk, I.A.; Pryor, R.A.; Coleman, M.G.

1982-08-27T23:59:59.000Z

418

Ligand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells  

E-Print Network (OSTI)

transient photovoltaic behavior in inverted organic solar cells Jong Bok Kim,1,a) Seokhoon Ahn,2,b) Seok JuLigand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells Jong Bok Kim, Seokhoon Ahn, Seok Ju Kang, Colin Nuckolls, and Yueh-Lin Loo Citation: Appl

419

Applying KeyGraph and Data Crystallization to technology monitoring on solar cell  

Science Conference Proceedings (OSTI)

Technology monitoring is helpful for companies, employees, and stakeholders to understand the technological situation of their supplying products nowadays. Solar cell, one of the green energy, is growing rapidly with its nonpolluted and unexhausted characteristics. ... Keywords: Technology monitoring, data crystallization, keygraph, patent data, solar cell

Tzu-Fu Chiu

2010-08-01T23:59:59.000Z

420

Better Solar Cells and Manufacturing Processes Using NREL's Ultrafast Quantum Efficiency Method (Fact Sheet)  

DOE Green Energy (OSTI)

Fact sheet on the FlashQE system, a 2011 R&D 100 Award winner. A solid-state optical system by NREL and Tau Science measures solar cell quantum efficiency in less than a second, enabling a suite of new capabilities for solar cell manufacturers.

Not Available

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Applying Chance Discovery with Dummy Event in Technology Monitoring of Solar Cell  

Science Conference Proceedings (OSTI)

One of the green energy, solar cell, is growing rapidly; the monitoring of its technological situation becomes critical for the stakeholders nowadays. Meanwhile, the patent data contains plentiful technological information from which is worthwhile for ... Keywords: Technology monitoring, chance discovery, patent data, solar cell

Tzu-Fu Chiu; Chao-Fu Hong; Ming-Yeu Wang; Chia-Ling Hsu; Yu-Ting Chiu

2009-06-01T23:59:59.000Z

422

An Identification of Technology Opportunity on Dye-Sensitized Solar Cell  

Science Conference Proceedings (OSTI)

Solar cell, one of green energies, is growing at a fast pace with its clean and renewable characters in recent 20 years. Patent data contains plentiful technological information from which it is worthwhile to extract further knowledge. Thus, a research ... Keywords: grounded theory, association analysis, technology opportunity, thin-film solar cell, patent data

Tzu-Fu Chiu; Chao-Fu Hong; Chun-An Pai; Shih-Wei Yang

2012-09-01T23:59:59.000Z

423

Chance discovery with data crystallization for scenario formation in solar cell technology  

Science Conference Proceedings (OSTI)

As the solar cell, one of renewable energies, is growing at a fast pace, the recognition of its technological situation becomes necessary for a company and stakeholders nowadays. Meanwhile, the patent data contains plentiful technological information ... Keywords: chance discovery, data crystallization, patent data, scenario formation, solar cell

Tzu-Fu Chiu; Chao-Fu Hong; Ming-Yeu Wang; Yu-Ting Chiu

2009-10-01T23:59:59.000Z

424

Technological collaboration patterns in solar cell industry based on patent inventors and assignees analysis  

Science Conference Proceedings (OSTI)

This study examines technological collaboration in the solar cell industry using the information of patent assignees and inventors as defined by the United States Patent and Trademark Office. Three different collaborative types, namely local (same city), ... Keywords: Assignee, Collaboration, Inventor, PV system, Patent analysis, Solar cell

Xiao-Ping Lei; Zhi-Yun Zhao; Xu Zhang; Dar-Zen Chen; Mu-Hsuan Huang; Jia Zheng; Run-Sheng Liu; Jing Zhang; Yun-Hua Zhao

2013-08-01T23:59:59.000Z

425

Amorphous silicon solar cells. Quarterly report No. 1, 1 October 1980-31 December 1980  

DOE Green Energy (OSTI)

Progress is reported on the following: theoretical modeling, deposition and doping studies, experimental methods for the characterization of a-Si:H, formation of solar-cell structures, theoretical and experimental evaluation of solar-cell parameters, and stability studies. (MHR)

Carlson, D.E.; Balberg, I.; Crandall, R.S.; Dresner, J.; Goldstein, B.; Hanak, J.J.; Schade, H.E.; Staebler, D.L.; Weakliem, H.A.

1981-02-01T23:59:59.000Z

426

Identification, Characterization, and Implications of Shadow Degradation in Thin Film Solar Cells  

E-Print Network (OSTI)

that the SD is a generic reliability concern for all thin film PV technologies, however, in this paper we, USA Abstract-- We describe a comprehensive study of intrinsic reliability issue arising from partial reliability concern for thin film solar cell. Keywords ­ Thin film solar cells, voltage stress, performance

Alam, Muhammad A.

427

Producing Solar Cells By Surface Preparation For Accelerated Nucleation Of Microcrystalline Silicon On Heterogeneous Substrates.  

DOE Patents (OSTI)

Attractive multi-junction solar cells and single junction solar cells with excellent conversion efficiency can be produced with a microcrystalline tunnel junction, microcrystalline recombination junction or one or more microcrystalline doped layers by special plasma deposition processes which includes plasma etching with only hydrogen or other specified etchants to enhance microcrystalline growth followed by microcrystalline. nucleation with a doped hydrogen-diluted feedstock.

Yang, Liyou (Plainsboro, NJ); Chen, Liangfan (Langhorne, PA)

1998-03-24T23:59:59.000Z

428

Silicon Ink for High-Efficiency Solar Cells Captures a Share of the Market (Fact Sheet)  

DOE Green Energy (OSTI)

Fact sheet on 2011 R&D 100 Award winner Silicon Ink. Liquid silicon has arrived, and with it comes a power boost for solar cells and dramatic cost savings for cell manufacturers.

Not Available

2011-08-01T23:59:59.000Z

429

Output-increasing, protective cover for a solar cell  

DOE Patents (OSTI)

A flexible cover (14) for a flexible solar cell (12) protects the cell from the ambient and increases the cell's efficiency. The cell(12)includes silicon spheres (16) held in a flexible aluminum sheet matrix (20,22). The cover (14) is a flexible, protective layer (60) of light-transparent material having a relatively flat upper, free surface (64) and an irregular opposed surface (66). The irregular surface (66) includes first portions (68) which conform to the polar regions (31R) of the spheres (16) and second convex (72) or concave (90) portions (72 or 90) which define spaces (78) in conjunction with the reflective surface (20T) of one aluminum sheet (20). Without the cover (14) light (50) falling on the surface (20T) between the spheres (16) is wasted, that is, it does not fall on a sphere (16). The surfaces of the second portions are non-parallel to the direction of the otherwise wasted light (50), which fact, together with a selected relationship between the refractive indices of the cover and the spaces, result in sufficient diffraction of the otherwise wasted light (50) so that about 25% of it is reflected from the surface (20T) onto a sphere (16).

Hammerbacher, Milfred D. (Dallas, TX)

1995-11-21T23:59:59.000Z

430

Low Cost Solar Water Heater  

SciTech Connect

This project was directed by NREL to pursue development of an all polymer solar thermal collector. The proposed design utilized a dual sheet thermoform process to coincidentally form the absorber as well as the containment structure to support the glazing. It utilized ventilation to overcome stagnation degradation of the polymer materials.

William Bostic

2005-12-16T23:59:59.000Z

431

Back surface cell structures for reducing recombination in CZ silicon solar cells  

DOE Green Energy (OSTI)

Mass-produced terrestrial CZ silicon solar cells are currently entering the domain in which bulk diffusion length is comparable to the cell thickness, so that recombination at the back surface can have a significant effect on device performance. Three manufacturable processes that address the problem of back recombination are examined here: boron diffusion from a deposited doped SiO{sub 2}, layer; Al-alloyed layers using screen-printed paste; and use of a collecting n* layer on the back interdigitated with the positive electrode. 104-cm{sup 2} cells fabricated at Siemens Solar Industries using these back surface structures are characterized by current-voltage, spectral response, photoconductivity decay, and SIMS measurements.

King, R.R.; Mitchell, K.W. [Siemens Solar Industries, Camarillo, CA (United States); Gee, J.M. [Sandia National Labs., Albuquerque, NM (United States)

1994-12-31T23:59:59.000Z

432

Photonic Design: From Fundamental Solar Cell Physics to Computational Inverse Design  

E-Print Network (OSTI)

Photonic innovation is becoming ever more important in the modern world. Optical systems are dominating shorter and shorter communications distances, LED's are rapidly emerging for a variety of applications, and solar cells show potential to be a mainstream technology in the energy space. The need for novel, energy-efficient photonic and optoelectronic devices will only increase. This work unites fundamental physics and a novel computational inverse design approach towards such innovation. The first half of the dissertation is devoted to the physics of high-efficiency solar cells. As solar cells approach fundamental efficiency limits, their internal physics transforms. Photonic considerations, instead of electronic ones, are the key to reaching the highest voltages and efficiencies. Proper photon management led to Alta Device's recent dramatic increase of the solar cell efficiency record to 28.3%. Moreover, approaching the Shockley-Queisser limit for any solar cell technology will require light extraction to ...

Miller, Owen D

2013-01-01T23:59:59.000Z

433

Solar powered desalination system  

E-Print Network (OSTI)

Desalination Systems Developers MIT BARC IMB Power Solar PVcells Solar PV cells 10 MW solar farm Solar pond FranciscoSolar Energy: PEC vs. PV Solar energy is just as important

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

434

Solar cell modules with improved backskin and methods for forming same  

SciTech Connect

A laminated solar cell module with a backskin layer that reduces the materials and labor required during the manufacturing process. The solar cell module includes a rigid front support layer formed of light transmitting material having first and second surfaces. A transparent encapsulant layer has a first surface disposed adjacent the second surface of the front support layer. A plurality of interconnected solar cells have a first surface disposed adjacent a second surface of the transparent encapsulant layer. The backskin layer is formed of a thermoplastic olefin, which includes first ionomer, a second ionomer, glass fiber, and carbon black. A first surface of the backskin layer is disposed adjacent a second surface of the interconnected solar cells. The transparent encapsulant layer and the backskin layer, in combination, encapsulate the interconnected solar cells. An end portion of the backskin layer can be wrapped around the edge of the module for contacting the first surface of the front support layer to form an edge seal. A laminated solar cell module with a backskin layer that reduces the materials and labor required during the manufacturing process. The solar cell module includes a rigid front support layer formed of light transmitting material having first and second surfaces. A transparent encapsulant layer has a first surface disposed adjacent the second surface of the front support layer. A plurality of interconnected solar cells have a first surface disposed adjacent a second surface of the transparent encapsulant layer. The backskin layer is formed of a thermoplastic olefin, which includes first ionomer, a second ionomer, glass fiber, and carbon black. A first surface of the backskin layer is disposed adjacent a second surface of the interconnected solar cells. The transparent encapsulant layer and the backskin layer, in combination, encapsulate the interconnected solar cells. An end portion of the backskin layer can be wrapped around the edge of the module for contacting the first surface of the front support layer to form an edge seal.

Hanoka, Jack I. (Brookline, MA)

1998-04-21T23:59:59.000Z

435

Green Solar In 2009 researchers at Berkeley helped shift research into new solar cell materials by  

E-Print Network (OSTI)

.: Solar Thermal Collector and PV Module Certification UCF-8.003 SUMMARY OF REGULATION AMENDMENT REGULATION AMENDMENT: Philip Fairey, Deputy Director, Florida Solar Energy Center COMMENTS CONCERNING-mail: regulations@mail.ucf.edu FULL TEXT OF THE PROPOSED REGULATION AMENDMENT: UCF6C7-8.003 Solar Thermal Collector

Iglesia, Enrique

436

Metal catalyst technique for texturing silicon solar cells  

SciTech Connect

Textured silicon solar cells and techniques for their manufacture utilizing metal sources to catalyze formation of randomly distributed surface features such as nanoscale pyramidal and columnar structures. These structures include dimensions smaller than the wavelength of incident light, thereby resulting in a highly effective anti-reflective surface. According to the invention, metal sources present in a reactive ion etching chamber permit impurities (e.g. metal particles) to be introduced into a reactive ion etch plasma resulting in deposition of micro-masks on the surface of a substrate to be etched. Separate embodiments are disclosed including one in which the metal source includes one or more metal-coated substrates strategically positioned relative to the surface to be textured, and another in which the walls of the reaction chamber are pre-conditioned with a thin coating of metal catalyst material.

Ruby, Douglas S. (Albuquerque, NM); Zaidi, Saleem H. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

437

Preparation Of Copper Indium Gallium Diselenide Films For Solar Cells  

DOE Patents (OSTI)

High quality thin films of copper-indium-gallium-diselenide useful in the production of solar cells are prepared by electrodepositing at least one of the constituent metals onto a glass/Mo substrate, followed by physical vapor deposition of copper and selenium or indium and selenium to adjust the final stoichiometry of the thin film to approximately Cu(In,Ga)Se.sub.2. Using an AC voltage of 1-100 KHz in combination with a DC voltage for electrodeposition improves the morphology and growth rate of the deposited thin film. An electrodeposition solution comprising at least in part an organic solvent may be used in conjunction with an increased cathodic potential to increase the gallium content of the electrodeposited thin film.

Bhattacharya, Raghu N. (Littleton, CO); Contreras, Miguel A. (Golden, CO); Keane, James (Lakewood, CO); Tennant, Andrew L. (Denver, CO), Tuttle, John R. (Denver, CO); Ramanathan, Kannan (Lakewood, CO); Noufi, Rommel (Golden, CO)

1998-08-08T23:59:59.000Z

438

Polycrystalline thin-film solar cells and modules  

DOE Green Energy (OSTI)

This paper describes the recent technological advances in polycrystalline thin-film solar cells and modules. Three thin film materials, namely, cadmium telluride (CdTe), copper indium diselenide (CuInSe{sub 2}, CIS) and silicon films (Si-films) have made substantial technical progress, both in device and module performance. Early stability results for modules tested outdoors by various groups worldwide are also encouraging. The major global players actively involved in the development of the these technologies are discussed. Technical issues related to these materials are elucidated. Three 20-kW polycrystalline thin-film demonstration photovoltaic (PV) systems are expected to be installed in Davis, CA in 1992 as part of the Photovoltaics for Utility-Scale Applications (PVUSA) project. This is a joint project between the US Department of Energy (DOE), Pacific Gas and Electric (PG&E), Electric Power Research Institute (EPRI), California Energy Commission (CEC), and a utility consortium.

Ullal, H.S.; Stone, J.L.; Zweibel, K.; Surek, T.; Mitchell, R.L.

1991-12-01T23:59:59.000Z

439

Polycrystalline thin-film solar cells and modules  

DOE Green Energy (OSTI)

This paper describes the recent technological advances in polycrystalline thin-film solar cells and modules. Three thin film materials, namely, cadmium telluride (CdTe), copper indium diselenide (CuInSe{sub 2}, CIS) and silicon films (Si-films) have made substantial technical progress, both in device and module performance. Early stability results for modules tested outdoors by various groups worldwide are also encouraging. The major global players actively involved in the development of the these technologies are discussed. Technical issues related to these materials are elucidated. Three 20-kW polycrystalline thin-film demonstration photovoltaic (PV) systems are expected to be installed in Davis, CA in 1992 as part of the Photovoltaics for Utility-Scale Applications (PVUSA) project. This is a joint project between the US Department of Energy (DOE), Pacific Gas and Electric (PG E), Electric Power Research Institute (EPRI), California Energy Commission (CEC), and a utility consortium.

Ullal, H.S.; Stone, J.L.; Zweibel, K.; Surek, T.; Mitchell, R.L.

1991-12-01T23:59:59.000Z

440

Amorphous-silicon thin-film heterojunction solar cells  

DOE Green Energy (OSTI)

The investigation of amorphous silicon materials at MTSEC has had two major thrusts: (1) to improve the amorphous material, i.e., obtain a low state density in the gap, improve the carrier collection depth and diminish non-radiative recombinations; and (2) to attempt to understand and improve on the limitations of the junction devices while evaluating the amorphous silicon materials. In the first of these efforts, the investigation has continued to examine the modifications to the a-Si(H) network by alloying silicon with other group IVA elements, either in binary or ternary compositions, and/or by replacing the hydrogenation for defect compensation with a combination of hydrogenation and alkylation or hydrogenation and halogenation. The doped junction layers are being examined in an attempt to determine the limiting characteristics of the junctions in solar cell devices of these amorphous materials. Amorphous alloys of Si-Ge, Si-C, Si-Sn were prepared as well as ternary compositions of Si-Ge-C and Si-Sn-C. In addition, Na vapor was added to the gas feed to deposit a-Si(Na, H) films, and to prepare Si-Sn, fluoride was added along with the tin by vapor additions of SnF/sub 4/ to the gas feed. The optical properties of these materials were measured, and structural and compositional information was obtained from the IR vibrational spectra using the scanning electron microscope and from analyses using scanning Auger microscopy. Electrical measurements have included the dark conductivity and the photo conductivity under room fluorescent light and at AM1 conditions. With alloys that displayed promising photoconductive properties n-i-p devices were prepared to assess the solar cell properties. Details are presented. (WHK)

Cretella, M. C.; Gregory, J. A.; Sandstrom, D. B.; Paul, W.

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Development of high efficiency cascade solar cells. Quarterly technical progress report No. 2  

DOE Green Energy (OSTI)

Research has continued in the development of selected ternary and quaternary III-V materials that are potential candidates for cascade solar cell applications. In addition, various simple and multi-junction cascade solar cell components have been fabricated and evaluated in a continuing study of several different solar cell designs (materials combinations). During the present reporting period, work has concentrated on the following major areas: GaAlAs/GaAs cell development; AlGaAsSb/GaAsSb materials development; GaInP materials development via VPE; inverted structure development; and MO/CVD growth system work at NCSU. Progress in each of these areas is summarized.

Not Available

1979-12-31T23:59:59.000Z

442

Hydrogenation of Dislocation-Limited Heteroepitaxial Silicon Solar Cells: Preprint  

DOE Green Energy (OSTI)

Post-deposition hydrogenation by remote plasma significantly improves performance of heteroepitaxial silicon solar cells. Heteroepitaxial deposition of thin crystal silicon on sapphire for photovoltaics (PV) is an excellent model system for the study and improvement of deposition on inexpensive Al2O3-coated (100) biaxially-textured metal foils. Without hydrogenation, PV conversion efficiencies are less than 1% on our model system. Performance is limited by carrier recombination at electrically active dislocations that result from lattice mismatch, and other defects. We find that low-temperature hydrogenation at 350 degrees C is more effective than hydrogenation at 610 degrees C. In this work, we use measurements such as spectral quantum efficiency, secondary ion mass spectrometry (SIMS), and vibrational Si-H spectroscopies to understand the effects of hydrogenation on the materials and devices. Quantum efficiency increases most at red and green wavelengths, indicating hydrogenation is affecting the bulk more than the surface of the cells. SIMS shows there are 100X more hydrogen atoms in our cells than dangling bonds along dislocations. Yet, Raman spectroscopy indicates that only low temperature hydrogenation creates Si-H bonds; trapped hydrogen does not stably passivate dangling-bond recombination sites at high temperatures.

Bolen, M. L.; Grover, S.; Teplin, C. W.; Bobela, D.; Branz, H. M.; Stradins, P.

2012-06-01T23:59:59.000Z

443

Fabricating amorphous silicon solar cells by varying the temperature _of the substrate during deposition of the amorphous silicon layer  

DOE Patents (OSTI)

An improved process for fabricating amorphous silicon solar cells in which the temperature of the substrate is varied during the deposition of the amorphous silicon layer is described. Solar cells manufactured in accordance with this process are shown to have increased efficiencies and fill factors when compared to solar cells manufactured with a constant substrate temperature during deposition of the amorphous silicon layer.

Carlson, David E. (Yardley, PA)

1982-01-01T23:59:59.000Z

444

EEE 565 Solar Cells Course Objective: To introduce the basic concepts of the operation of photovoltaic devices, the  

E-Print Network (OSTI)

solar cell technologies, and how they are integrated into solar cell systems. Topics: 1) PhotovoltaicEEE 565 Solar Cells Fall 2012 Course Objective: To introduce the basic concepts of the operation of photovoltaic devices, the major technologies, and the impact of materials and device structure

Zhang, Junshan

445

CIBS Solar Cell Development Final Scientific/Technical Report  

SciTech Connect

Efforts to fabricate and study a new photovoltaic material, copper indium boron diselenide (CuInxB1-xSe2 or CIBS), were undertaken. Attempts to prepare CIBS using sputtering deposition techniques resulted in segregation of boron from the rest of elements in the material. CIBS nanocrystals were prepared from the reaction of elemental Se with CuCl, InCl3, and boric acid in solution, but the product material quickly decomposed upon heating that was required in attempts to convert the nanocrystals into a thin film. The investigation of the reasons for the lack of CIBS material stability led to new structure-property studies of closely-related photovoltaic systems as well as studies of new solar cell materials and processing methods that could enhance the development of next-generation solar technologies. A detailed compositional study of CuIn1-xAlxSe2 (CIAS, a system closely related to CIBS) revealed a non-linear correlation between crystal lattice size and the Al/(In+Al) ratios with dual-phase formation being observed. A new nanocrystal-to-thin-film processing method was developed for the preparation of CuIn1-xGaxSe2 (CIGS) thin films in which colloidal Se particles are sprayed in contact with CuIn1-xGaxS2 nanoparticles and heated in an argon atmosphere with no other Se source in the system. The process is non-vacuum and does not require toxic gases such as Se vapor or H2Se. Expertise gained from these studies was applied to new research in the preparation of thin-film pyrite FeS2, an attractive earth-abundant candidate material for next-generation photovoltaics. Three methods successfully produced pure pyrite FeS2 films: sulfurization of sputtered Fe films, chemical bath deposition, and sulfurization of Fe2O3 sol-gel precursors. The last method produced pinhole-free films that may be viable for device development. Nickel, platinum, and possibly carbon would appear to serve as good ohmic contact materials. While CdS has a reasonable conduction band energy match to serve as an n-type buffer material in a pyrite FeS2-based solar cell, the less toxic SnS2 is being explored for this purpose.

Exstrom, Christopher L.; Soukup, Rodney J.; Ianno, Natale J.

2011-09-28T23:59:59.000Z

446

ORNL researchers make strides toward a copper oxide solar cell...  

NLE Websites -- All DOE Office Websites (Extended Search)

his team of research scientists are using copper oxide to redesign the face of solar power. The once-dismissed solar semiconductor, one of the first discovered, is the basis of...

447

Light Trapping for High Efficiency Heterojunction Crystalline Si Solar Cells: Preprint  

DOE Green Energy (OSTI)

Light trapping plays an important role to achieve high short circuit current density (Jsc) and high efficiency for amorphous/crystalline Si heterojunction solar cells. Si heterojunction uses hydrogenated amorphous Si for emitter and back contact. This structure of solar cell posses highest open circuit voltage of 0.747 V at one sun for c-Si based solar cells. It also suggests that over 25% record-high efficiency is possible with further improvement of Jsc. Light trapping has two important tasks. The first one is to reduce the surface reflectance of light to zero for the solar spectrum that Si has a response. The second one is to increase the effective absorption length to capture all the photon. For Si heterojunction solar cell, surface texturing, anti-reflectance indium tin oxides (ITO) layer at the front and back are the key area to improve the light trapping.

Wang, Q.; Xu, Y.; Iwaniczko, E.; Page, M.

2011-04-01T23:59:59.000Z

448

Microbially facilitated kesterite formation for solar cell devices  

centuries due to rising oil price and demanding the reduction of green house gases. The global solar electricity

449

Reflectance Spectroscopy: Rapid Quantitative Measurements in Commercial Production of Si Solar Cells  

DOE Green Energy (OSTI)

The reflectance spectrum of a wafer/solar cell is used to measure physical parameters of the wafer and its structural components and interfaces. New applications of the reflectometer have been developed, which enable determination of the average parameters over the entire wafer/cell, as well as their spatial mapping. Measurements can be made in less than 100 ms. This method is well suited for commercial monitoring of solar cell processing.

Sopori, B.

2005-01-01T23:59:59.000Z

450

Influence of parasitic resistances on the mismatch relative power loss of solar cell modules  

E-Print Network (OSTI)

available from a photovoltaic module is reduced by the cell-to-cell variations in the photogenerated current of the integrated bypass diode in the unit cell structure. Previous studies on the performance of photovoltaic solar. [ 11 ] have pro- posed a sorting method of the photovoltaic cells and modules in a array into four bins

Paris-Sud XI, Université de

451

Processes for producing low cost, high efficiency silicon solar cells  

DOE Patents (OSTI)

Processes which utilize rapid thermal processing (RTP) are provided for inexpensively producing high efficiency silicon solar cells. The RTP processes preserve minority carrier bulk lifetime .tau. and permit selective adjustment of the depth of the diffused regions, including emitter and back surface field (bsf), within the silicon substrate. In a first RTP process, an RTP step is utilized to simultaneously diffuse phosphorus and aluminum into the front and back surfaces, respectively, of a silicon substrate. Moreover, an in situ controlled cooling procedure preserves the carrier bulk lifetime .tau. and permits selective adjustment of the depth of the diffused regions. In a second RTP process, both simultaneous diffusion of the phosphorus and aluminum as well as annealing of the front and back contacts are accomplished during the RTP step. In a third RTP process, the RTP step accomplishes simultaneous diffusion of the phosphorus and aluminum, annealing of the contacts, and annealing of a double-layer antireflection/passivation coating SiN/SiO.sub.x. In a fourth RTP process, the process of applying front and back contacts is broken up into two separate respective steps, which enhances the efficiency of the cells, at a slight time expense. In a fifth RTP process, a second RTP step is utilized to fire and adhere the screen printed or evaporated contacts to the structure.

Rohatgi, Ajeet (Marietta, GA); Doshi, Parag (Altanta, GA); Tate, John Keith (Lawrenceville, GA); Mejia, Jose (Atlanta, GA); Chen, Zhizhang (Duluth, GA)

1998-06-16T23:59:59.000Z

452

Processes for producing low cost, high efficiency silicon solar cells  

DOE Patents (OSTI)

Processes which utilize rapid thermal processing (RTP) are provided for inexpensively producing high efficiency silicon solar cells. The RTP processes preserve minority carrier bulk lifetime {tau} and permit selective adjustment of the depth of the diffused regions, including emitter and back surface field (bsf), within the silicon substrate. In a first RTP process, an RTP step is utilized to simultaneously diffuse phosphorus and aluminum into the front and back surfaces, respectively, of a silicon substrate. Moreover, an in situ controlled cooling procedure preserves the carrier bulk lifetime {tau} and permits selective adjustment of the depth of the diffused regions. In a second RTP process, both simultaneous diffusion of the phosphorus and aluminum as well as annealing of the front and back contacts are accomplished during the RTP step. In a third RTP process, the RTP step accomplishes simultaneous diffusion of the phosphorus and aluminum, annealing of the contacts, and annealing of a double-layer antireflection/passivation coating SiN/SiO{sub x}. In a fourth RTP process, the process of applying front and back contacts is broken up into two separate respective steps, which enhances the efficiency of the cells, at a slight time expense. In a fifth RTP process, a second RTP step is utilized to fire and adhere the screen printed or evaporated contacts to the structure. 28 figs.

Rohatgi, A.; Doshi, P.; Tate, J.K.; Mejia, J.; Chen, Z.

1998-06-16T23:59:59.000Z

453

Applications of Metal Oxide Materials in Dye Sensitized Photoelectrosynthesis Cells for Making Solar Fuels: Let the Molecules do the Work  

Science Conference Proceedings (OSTI)

Solar fuels hold great promise as a permanent, environmentally friendly, long-term renewable energy source, that would be readily available across the globe. In this account, an approach to solar fuels is described based on Dye Sensitized Photoelectrosynthesis Cells (DSPEC) that mimic the configuration used in Dye Sensitized Solar Cells (DSSC), but with the goal of producing oxygen and a high energy solar fuel in the separate compartments of a photoelectrochemical cell rather than a photopotential and photocurrent.

Alibabaei, Leila; Luo, Hanlin; House, Ralph L.; Hoertz, Paul G.; Lopez, Rene; Meyer, Thomas J.

2013-01-01T23:59:59.000Z

454

EH AND S ANALYSIS OF DYE-SENSITIZED PHOTOVOLTAIC SOLAR CELL PRODUCTION.  

DOE Green Energy (OSTI)

Photovoltaic solar cells based on a dye-sensitized nanocrystalline titanium dioxide photoelectrode have been researched and reported since the early 1990's. Commercial production of dye-sensitized photovoltaic solar cells has recently been reported in Australia. In this report, current manufacturing methods are described, and estimates are made of annual chemical use and emissions during production. Environmental, health and safety considerations for handling these materials are discussed. This preliminary EH and S evaluation of dye-sensitized titanium dioxide solar cells indicates that some precautions will be necessary to mitigate hazards that could result in worker exposure. Additional information required for a more complete assessment is identified.

BOWERMAN,B.; FTHENAKIS,V.

2001-10-01T23:59:59.000Z

455

Award-Winning Etching Process Cuts Solar Cell Costs (Fact Sheet)  

SciTech Connect

NREL scientists have invented the 'black silicon' nanocatalytic wet-chemical etch, an inexpensive, one-step process that literally turns the solar cells black, allowing them to absorb more than 98% of incident sunlight. The process costs just a few cents per watt of solar-cell power-producing capacity. Increases in manufactured cell efficiencies of up to 0.8% are possible because of the reduced reflectance of black silicon. This would reduce silicon solar module costs by $5-$10 per module.

Not Available

2013-08-01T23:59:59.000Z

456

Overview of thick-film technology as applied to solar cells  

DOE Green Energy (OSTI)

Thick-film technology was developed by the electronics industry as a means of fabricating components and miniature circuitry. Today, the solar cell industry is looking at screen printing as an alternate to more expensive, high-vacuum techniques in several of the production steps during the manufacture of silicon solar cells. Screen printing is already fairly well established as a means of providing electrical contact to a cell and for the formation of a back surface field. Now under investigation are the possibilities of non-noble metal contacts and protective and antireflective coatings applied to solar cells by the use of screen printing. Most exciting is the work being done in the non-silicon area on the fabrication of the active layers of a solar cell, using thick-film inks made up of II-VI semiconductors.

Firor, K.; Hogan, S.

1980-01-01T23:59:59.000Z

457

Hybrid Solar Cells with Prescribed Nanoscale Morphologies Based onHyperbranched Semiconductor Nanocrystals  

SciTech Connect

In recent years, the search to develop large-area solar cells at low cost has led to research on photovoltaic (PV) systems based on nanocomposites containing conjugated polymers. These composite films can be synthesized and processed at lower costs and with greater versatility than the solid state inorganic semiconductors that comprise today's solar cells. However, the best nanocomposite solar cells are based on a complex architecture, consisting of a fine blend of interpenetrating and percolating donor and acceptor materials. Cell performance is strongly dependent on blend morphology, and solution-based fabrication techniques often result in uncontrolled and irreproducible blends, whose composite morphologies are difficult to characterize accurately. Here we incorporate 3-dimensional hyper-branched colloidal semiconductor nanocrystals in solution-processed hybrid organic-inorganic solar cells, yielding reproducible and controlled nanoscale morphology.

Gur, Ilan; Fromer, Neil A.; Chen, Chih-Ping; Kanaras, AntoniosG.; Alivisatos, A. Paul

2006-09-09T23:59:59.000Z

458

Multi-phase back contacts for CIS solar cells  

DOE Patents (OSTI)

Multi-phase, single layer, non-interdiffusing M-Mo back contact metallized films, where M is selected from Cu, Ga, or mixtures thereof, for CIS cells are deposited by a sputtering process on suitable substrates, preferably glass or alumina, to prevent delamination of the CIS from the back contact layer. Typical CIS compositions include CuXSe{sub 2} where X is In or/and Ga. The multi-phase mixture is deposited on the substrate in a manner to provide a columnar microstructure, with micro-vein Cu or/and Ga regions which partially or fully vertically penetrate the entire back contact layer. The CIS semiconductor layer is then deposited by hybrid sputtering and evaporation process. The Cu/Ga-Mo deposition is controlled to produce the single layer two-phase columnar morphology with controllable Cu or Ga vein size less than about 0.01 microns in width. During the subsequent deposition of the CIS layer, the columnar Cu/Ga regions within the molybdenum of the Cu/Ga-Mo back layer tend to partially leach out, and are replaced by columns of CIS. Narrower Cu and/or Ga regions, and those with fewer inner connections between regions, leach out more slowly during the subsequent CIS deposition. This gives a good mechanical and electrical interlock of the CIS layer into the Cu/Ga-Mo back layer. Solar cells employing In-rich CIS semiconductors bonded to the multi-phase columnar microstructure back layer of this invention exhibit vastly improved photo-electrical conversion on the order of 17% greater than Mo alone, improved uniformity of output across the face of the cell, and greater Fill Factor. 15 figs.

Rockett, A.A.; Yang, L.C.

1995-12-19T23:59:59.000Z

459

Gallium arsenide-based ternary compounds and multi-band-gap solar cell research  

DOE Green Energy (OSTI)

Aim of this contract is the achievement of a high-efficiency, low-cost solar cell. The basic approach to the problem is centered upon the heteroepitaxial growth of a III-V compound material onto a single-crystal silicon wafer. The growth technique employed is metalorganic chemical vapor deposition. The silicon wafer may serve as a mechanical substrate and ohmic contact for a single-junction device, or may contain a p-n junction of its own and form the bottom cell of a two junction tandem solar cell structure. The III-V material for the single-junction case is GaAs and for the two-junction case is either GaAlAs or GaAsP, either material having the proper composition to yield a band gap of approximately 1.7 eV. Results achieved in this contract include the following: (1) a 17.6% efficient GaAs-on-Si solar cell; (2) an 18.5% efficient GaAs-on-Si concentrator solar cell at 400 suns; (3) a 24.8% efficient GaAs-on-GaAs solar cell; (4) a 28.7% efficient GaAs-on-GaAs concentrator solar cell at 200 suns; (5) measurement of the effects of dislocation density and emitter doping on GaAs cells; and (6) improvements in the growth process to achieve reproducible thin AlGaAs window layers with low recombination velocities and environmental stability.

Vernon, S. (Spire Corp., Bedford, MA (United States))

1993-02-01T23:59:59.000Z

460

NREL Explores Earth-Abundant Materials for Future Solar Cells (Fact Sheet)  

DOE Green Energy (OSTI)

Researchers at the National Renewable Energy Laboratory (NREL) are using a theory-driven technique - sequential cation mutation - to understand the nature and limitations of promising solar cell materials that can replace today's technologies. Finding new materials that use Earth-abundant elements and are easily manufactured is important for large-scale solar electricity deployment.

Not Available

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Photoconductive Decay Lifetime and Suns-Voc Diagnostics of Efficient Heterojunction Solar Cells: Preprint  

DOE Green Energy (OSTI)

We report results of minority carrier lifetime measurements for double-sided p-type Si heterojunction devices and compare Suns-Voc results to Light I-V measurements on 1 cm2 solar cell devices measured on an AM1.5 calibrated XT-10 solar simulator.

Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal L.; Bauer, R.; Yan, H.-C.; Wang, Q.; Meier, D. L.

2008-05-01T23:59:59.000Z

462

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network (OSTI)

for Improvement of Photovoltaic Solar Energy Converters,drastic improvement in photovoltaic (PV) energy conversionwith photovoltaic devices to improve the energy conversion

Shao, Qinghui

2009-01-01T23:59:59.000Z

463

Slag-based Refining of Silicon and Solar Cell Advances  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... There has been a strong commercial push recently towards thinner and thinner silicon in the solar photovoltaic (PV) technologies due to the...

464

Thermodynamics, Entropy, Information and the Efficiency of Solar Cells  

E-Print Network (OSTI)

and P.T. Landsberg, Thermodynamics and reciprocity of solar59. E. Yablonovitch, Thermodynamics of the fluorescentC. 139. E. Yablonovitch, Thermodynamics of the fluorescent

Abrams, Zeev R.

2012-01-01T23:59:59.000Z

465

Diffraction: Enhanced Light Absorption of Solar Cells and ...  

The solar and photovoltaic industry has grown steadily over the last several years. In order to maintain these growth rates, the processes and methods ...

466

Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating: Preprint  

DOE Green Energy (OSTI)

We apply a thin luminescent downshifting (LDS) coating to a hydrogenated amorphous Si (a-Si:H) solar cell and study the mechanism of possible current enhancement. The conversion material used in this study converts wavelengths below 400 nm to a narrow line around 615 nm. This material is coated on the front of the glass of the a-Si:H solar cell with a glass/TCO/p/i/n/Ag superstrate configuration. The initial efficiency of the solar cell without the LDS coating is above 9.0 % with open circuit voltage of 0.84 V. Typically, the spectral response below 400 nm of an a-Si:H solar cell is weaker than that at 615 nm. By converting ultraviolet (UV) light to red light, the solar cell will receive more red photons; therefore, solar cell performance is expected to improve. We observe evidence of downshifting in reflectance spectra. The cell Jsc decreases by 0.13 mA/cm2, and loss mechanisms are identified.

Nemeth, B.; Xu, Y.; Wang, H.; Sun, T.; Lee, B. G.; Duda, A.; Wang, Q.

2011-05-01T23:59:59.000Z

467

Integrated photonic structures for light trapping in thin-film Si solar cells  

E-Print Network (OSTI)

We explore the mechanisms for an efficient light trapping structure for thin-film silicon solar cells. The design combines a distributed Bragg reflector (DBR) and periodic gratings. Using photonic band theories and numerical ...

Sheng, Xing

468

Semiconducting Monolayer Materials as a Tunable Platform for Excitonic Solar Cells  

E-Print Network (OSTI)

The recent advent of two-dimensional monolayer materials with tunable optical properties and high carrier mobility offers renewed opportunities for efficient, ultrathin excitonic solar cells alternative to those based on ...

Bernardi, Marco

469

High-Efficiency 6?? Multicrystalline Black Solar Cells Based on Metal-Nanoparticle-Assisted Chemical Etching  

E-Print Network (OSTI)

Multicrystalline silicon (mc-Si) photovoltaic (PV) solar cells with nanoscale surface texturing by metal-nanoparticle-assisted etching are proposed to achieve high power efficiency. The investigation of average nanorod ...

Hsu, W. Chuck

2012-01-01T23:59:59.000Z

470

Light incoherence theory revisited by Heisenberg time-energy uncertainty challenges solar cell optimization  

E-Print Network (OSTI)

Optimization of the efficiency of solar cells is a major challenge for renewable energies. Using a rigorous theoretical approach, we show that the photocurrent generated in a solar cell depends strongly on the degree of coherence of the incident light. In accordance with Heisenberg uncertainty time-energy, incoherent light at photons of carrier energy lower than the active material bandgap can be absorbed whereas coherent light at the same carrier energy cannot. We identify cases where incoherence does enhance efficiency. This result has a dramatical impact on the way solar cells must be optimized regarding sunlight. As an illustration, surface-corrugated GaAs and c-Si thin-film solar cells are considered.

Herman, Aline; Deparis, Olivier

2013-01-01T23:59:59.000Z

471

Full-Spectrum Semiconducting Material for Affordable, Highly Efficient Solar Cells  

Wladyslaw Walukiewicz and Kin Man Yu of Berkeley Lab have designed a new semiconducting material that will enable the fabrication of high efficiency solar cells at a fraction of the price of other technologies.

472

Technological assessment of light-trapping technology for thin-film Si solar cell  

E-Print Network (OSTI)

The proposed light trapping technology of Distributed Bragg Reflector (DBR) with Diffraction Grating (DG) and Anti-Reflection Coating (ARC) for thin film Si solar cell was analyzed from the technology, market, and ...

Susantyoko, Rahmat Agung

2009-01-01T23:59:59.000Z

473

NREL's Optical Cavity Furnace Brings Together a Myriad of Advances for Processing Solar Cells (Fact Sheet)  

DOE Green Energy (OSTI)

Fact sheet on 2011 R&D 100 Award winner, the Optical Cavity Furnace. The innovative furnace uses light and unique light-induced effects to make higher-efficiency solar cells at lower cost.

Not Available

2011-08-01T23:59:59.000Z

474

High efficiency thin film silicon solar cells with novel light trapping : principle, design and processing  

E-Print Network (OSTI)

One major efficiency limiting factor in thin film solar cells is weak absorption of long wavelength photons due to the limited optical path length imposed by the thin film thickness. This is especially severe in Si because ...

Zeng, Lirong, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

475

Optimization of Quality of Service in Wireless Sensor Networks Powered by Solar Cells  

Science Conference Proceedings (OSTI)

Sensors equipped with solar cells and rechargeable batteries are useful in many outdoor, long-lasting applications. In these sensors the cycles of energy harvesting and battery recharge need to be managed appropriately in order to avoid sensor unavailability ...

Soledad Escolar; Stefano Chessa; Jesus Carretero

2012-07-01T23:59:59.000Z

476

Photoacoustic study of CdS QDs for application in quantum-dot-sensitized solar cells  

Science Conference Proceedings (OSTI)

The optical properties and photovoltaic characterization of CdS quantum dots sensitized solar cells (QDSSCs) were studied. CdS QDs were prepared by the chemical solution deposition (CD) technique. Photoacoustic spectroscopy (PA) was employed to study ...

S. Abdallah, N. Al-Hosiny, Ali Badawi

2012-01-01T23:59:59.000Z

477

for ITO-free, PEDOT:PSS-free bulk-heterojunction organic solar cells  

Science Conference Proceedings (OSTI)

The power conversion efficiency of the OSC with the ZAM electrode is lower than ... solar cells on ITO which has 3.3% efficiency, due to lower transmittance after ... Morphology Evolution to Restoration of Plasma-Induced Damage in Porous...

478

Earth abundant materials for high efficiency heterojunction thin film solar cells  

E-Print Network (OSTI)

We investigate earth abundant materials for thin-film solar cells that can meet tens of terawatts level deployment potential. Candidate materials are identified by combinatorial search, large-scale electronic structure ...

Buonassisi, Tonio

479

Property Influence of Polyanilines on Photovoltaic Behaviors of Dye-Sensitized Solar Cells  

E-Print Network (OSTI)

Property Influence of Polyanilines on Photovoltaic Behaviors of Dye-Sensitized Solar Cells Shuxin conductors on the photovoltaic behaviors of dye-sensitized solarcellsisstudied of both the film formation property and the cluster size of polyanilines on the photovoltaic behaviors

480

Investigation of the Role of Trap States in Solar Cell Reliability using Photothermal Deflection Spectroscopy  

E-Print Network (OSTI)

if moderate efficiency (10%) solar panels were used just forsolar cells and panels. A chart of the record efficienciessolar panel technology today is single crystal silicon (c-Si), since it can achieve relatively high device efficiencies,

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "all-polymer solar cells" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Enhanced Efficiency of Light-Trapping Nanoantenna Arrays for Thin Film Solar Cells  

E-Print Network (OSTI)

We suggest a novel concept of efficient light-trapping structures for thin-film solar cells based on arrays of planar nanoantennas operating far from plasmonic resonances. The operation principle of our structures relies on the excitation of chessboard-like collective modes of the nanoantenna arrays with the field localized between the neighboring metal elements. We demonstrated theoretically substantial enhancement of solar-cell short-circuit current by the designed light-trapping structure in the whole spectrum range of the solar-cell operation compared to conventional structures employing anti-reflecting coating. Our approach provides a general background for a design of different types of efficient broadband light-trapping structures for thin-film solar-cell technologically compatible with large-area thin-film fabrication techniques.

Simovski, Constantin R; Voroshilov, Pavel M; Guzhva, Michael E; Belov, Pavel A; Kivshar, Yuri S

2013-01-01T23:59:59.000Z

482

Effects of Accelerated Exposure Testing (AET) Conditions on Performance Degradation of Solar Cells and Encapsulants  

DOE Green Energy (OSTI)

The paper briefly summarizes the results from several accelerated exposure tests (AET) studies. Causes responsible for the photothermal instability of the encapsulated Si solar cells appear to be multiple and complex.

Glick, S. H.; Pern, F. J.

2000-01-01T23:59:59.000Z

483

Impact of defect type on hydrogen passivation effectiveness in multicrystalline silicon solar cells  

E-Print Network (OSTI)

In this work we examine the effectiveness of hydrogen passivation at grain boundaries as a function of defect type and microstructure in multicrystalline silicon. We analyze a specially prepared solar cell with alternating ...

Bertoni, Mariana I.

484

Efficiency Improvement of Crystalline Solar Cells: Final Subcontract Report, 1 January 2002 - 30 September 2006  

DOE Green Energy (OSTI)

UC-Berkeley study of transition metal related defects in PV-grade mc-Si to understand their pathways into solar cells; chemical state/distribution; interaction with structural defects; defect engineering.

Weber, E. R.

2007-11-01T23:59:59.000Z

485

Barrier Coatings for Thin Film Solar Cells: Final Subcontract Report, September 1, 2002 -- January 30, 2008  

DOE Green Energy (OSTI)

This program has involved investigations of the stability of CdTe and copper-indium-gallium-diselenide (CIGS) solar cells under damp heat conditions and effects of barrier coatings.

Olsen, L. C.

2010-03-01T23:59:59.000Z

486

NREL Invention Speeds Solar Cell Quality Testing for Industry (Fact Sheet)  

SciTech Connect

A solid-state optical system, invented by the National Renewable Energy Laboratory (NREL), measures solar cell quantum efficiency (QE) in less than a second, enabling a suite of new capabilities for solar cell manufacturers. QE is a measurement of how cells respond to light across the solar spectrum, but traditional methods for measuring QE had been too slow, limiting its application to small samples pulled from the production line and analyzed in laboratories. NREL's technique, commercialized by Tau Science as the FlashQE(TM) system, uses a solid-state light source, synchronized electronics, and advanced mathematical analysis to parallel-process QE data in a tiny fraction of the time required by the current method, allowing its use on every solar cell passing through a production line.

Not Available

2013-08-01T23:59:59.000Z

487

Aspects of charge recombination and charge transport in organic solar cells and light-emitting devices  

E-Print Network (OSTI)

In this thesis, aspects of charge reconbination and charge transport in organic solar cells and light-emitting devices are presented. These devices show promise relative to traditional inorganic semiconductors. We show ...

Difley, Seth

2010-01-01T23:59:59.000Z

488

NPS-SCAT electrical power system ; Naval Postgraduate School Solar Cell Array Tester .  

E-Print Network (OSTI)

??The Naval Postgraduate School Solar Cell Array Tester (NPS-SCAT) seeks to expand the CubeSat knowledge base and provide learning possibilities at the Naval Postgraduate School. (more)

Dorn, Lawrence Tyrone.

2009-01-01T23:59:59.000Z

489

Solar Cell Design for Manufacturing: Final Report, October 2005 - September 2007  

DOE Green Energy (OSTI)

GE Energy made progress in improving its solar cell process, developing its metal wrap-through process, and completing highly accelerated lifetime testing on elements of its roof-integrated module.

Rand, J. A.

2008-05-01T23:59:59.000Z

490

Studies on Backside Al-Contact Formation in Si Solar Cells: Fundamental Mechanisms; Preprint  

DOE Green Energy (OSTI)

This paper describes our investigations on the formation of back contacts in screen-printed solar cells, and how most requirements of a good back contact can be met by a suitable process.

Sopori, B.; Mehta, V.; Rupnowski, P.; Moutinho, H.; Shaikh, A.; Khadilkar, C.; Bennett, M.; Carlson, D.

2009-02-01T23:59:59.000Z

491

A market analysis for high efficiency multi-junction solar cells grown on SiGe  

E-Print Network (OSTI)

Applications, markets and a cost model are presented for III-V multi-junction solar cells built on compositionally graded SiGe buffer layers currently being developed by professors Steven Ringell of Ohio State University ...

Judkins, Zachara Steele

2007-01-01T23:59:59.000Z

492

Light trapping in thin film solar cells using textured photonic crystal  

DOE Patents (OSTI)

A solar cell includes a photoactive region that receives light. A photonic crystal is coupled to the photoactive region, wherein the photonic crystal comprises a distributed Bragg reflector (DBR) for trapping the light.

Yi, Yasha (Somerville, MA); Kimerling, Lionel C. (Concord, MA); Duan, Xiaoman (Amesbury, MA); Zeng, Lirong (Cambridge, MA)

2009-01-27T23:59:59.000Z

493

Thin Film Solar Cells with Light Trapping Transparent Conducting Oxide Layer  

E-Print Network (OSTI)

Thin film solar cells, if film thickness is thinner than the optical absorption length, typically give lower cell performance. For the thinner structure, electric current loss due to light penetration can offset the electric current gain obtained from higher built-in electric field. Light trapping schemes can increase the effective optical absorption length and thus enhance the electric current for thinner solar cells. Here a new light trapping scheme based on light trapping transparent conducting oxide layer (LT-TCO) is proposed to enhance the performance of thin film solar cells. Three different configurations of integrating the LT-TCO layer in solar cells are proposed and evaluated. This research aims to develop the LT-TCO layer with surface texture and good conductivity by pulsed laser deposition (PLD) technique at low temperature. The LT-TCO layer is fabricated by PLD deposition of Al-doped ZnO to achieve multilayer films by tuning of oxygen pressure. The light trapping effect is examined by optical transmittance measurement and the surface texture is characterized by transmission electron microscopy (TEM) technique. The conductivity of LT-TCO layer is measured by resistivity measurement. Thin film CdTe/CdS solar cells are fabricated by PLD technique to develop baseline solar cells for integration of LT-TCO layer. The as-deposited thin film solar cells show relatively low performance and are further processed with various post-deposition treatments to seek efficiency enhancement. The effects of different processes on cell performance are examined by electrical, optical, and microstructure studies. Air annealing of CdS layer and CdCl2 treatment of CdTe layer combined are found to yield the best cell performance. The fabrication issues that limit the cell performance are discussed and future optimizations in fabrication processes are suggested.

Lu, Tianlin

2011-05-01T23:59:59.000Z

494

Quantum Dot Solar Cells: High Efficiency through Multiple Exciton Generation  

DOE Green Energy (OSTI)

Impact ionization is a process in which absorbed photons in semiconductors that are at least twice the bandgap can produce multiple electron-hole pairs. For single-bandgap photovoltaic devices, this effect produces greatly enhanced theoretical thermodynamic conversion efficiencies that range from 45-85%, depending upon solar concentration, the cell temperature, and the number of electron-hole pairs produced per photon. For quantum dots (QDs), electron-hole pairs exist as excitons. We have observed astoundingly efficient multiple exciton generation (MEG) in QDs of PbSe (bulk Eg = 0.28 eV), ranging in diameter from 3.9 to 5.7nm (Eg = 0.73, 0.82, and 0.91 eV, respectively). The effective masses of electron and holes are about equal in PbSe, and the onset for efficient MEG occurs at about three times the QD HOMO-LUMO transition (its ''bandgap''). The quantum yield rises quickly after the onset and reaches 300% at 4 x Eg (3.64 eV) for the smallest QD; this means that every QD in the sample produces three electron-hole pairs/photon.

Hanna, M. C.; Ellingson, R. J.; Beard, M.; Yu, P.; Micic, O. I.; Nozik, A. J.; c.

2005-01-01T23:59:59.000Z

495

Improved hybrid solar cells via in situ UV-polymerization.  

DOE Green Energy (OSTI)

One approach for making inexpensive inorganic-organic hybrid photovoltaic (PV) cells is to fill highly ordered TiO{sub 2} nanotube (NT) arrays with solid organic hole conductors such as conjugated polymers. Here, a new in situ UV polymerization method for growing polythiophene (UV-PT) inside TiO{sub 2} NTs is presented and compared to the conventional approach of infiltrating NTs with pre-synthesized polymer. A nanotubular TiO{sub 2} substrate is immersed in a 2,5-diiodothiophene (DIT) monomer precursor solution and then irradiated with UV light. The selective UV photodissociation of the C-I bond produces monomer radicals with intact {pi}-ring structure that further produce longer oligothiophene/PT molecules. Complete photoluminescence quenching upon UV irradiation suggests coupling between radicals created from DIT and at the TiO{sub 2} surface via a charge transfer complex. Coupling with the TiO{sub 2} surface improves UV-PT crystallinity and {pi}-{pi} stacking; flat photocurrent values show that charge recombination during hole transport through the polymer is negligible. A non-ideal, backside-illuminated setup under illumination of 620-nm light yields a photocurrent density of {approx} 5 {micro}A cm{sup -2} - surprisingly much stronger than with comparable devices fabricated with polymer synthesized ex situ. Since in this backside architecture setup we illuminate the cell through the Ag top electrode, there is a possibility for Ag plasmon-enhanced solar energy conversion. By using this simple in situ UV polymerization method that couples the conjugated polymer to the TiO{sub 2} surface, the absorption of sunlight can be improved and the charge carrier mobility of the photoactive layer can be enhanced.

Tepavcevic, S.; Darling, S. B.; Dimitrijevic, N. M.; Rajh, T.; Sibener, S. J.; Univ. of Chicago

2009-08-03T23:59:59.000Z

496

Photovoltage Bleaching in Bulk Heterojunction Solar Cells through Occupation of the Charge Transfer State  

E-Print Network (OSTI)

We observe a strong peak in the capacitive photocurrent of a MDMO-PPV / PCBM bulk heterojunction solar cell for excitation below the absorbance threshold energy. Illumination at the peak energy blocks charge capture at other wavelengths, and causes the photovoltage to drop dramatically. These results suggest that the new peak is due to a charge transfer state, which provides a pathway for charge separation and photocurrent generation in the solar cell.

Shah, Hemant; Bansal, Tanesh; Alphenaar, Bruce

2010-01-01T23:59:59.000Z

497

Single-junction solar cells with the optimum band gap for terrestrial concentrator applications  

DOE Patents (OSTI)

A single-junction solar cell having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown that the presence of absorption bands in the direct spectrum has the effect of "pinning" the optimum band gap for a wide range of operating conditions at a value of 1.14.+-.0.02 eV. Efficiencies exceeding 30% may be possible at high concentration ratios for devices with the ideal band gap.

Wanlass, Mark W. (Golden, CO)

1994-01-01T23:59:59.000Z

498

Overcoming the Efficiency-Limiting Mechanisms in Commercial Si Solar Cells  

DOE Green Energy (OSTI)

A brief review of performance-limiting processes in a commercial solar cell fabricated on low-cost substrate is given. Higher efficiencies require effective gettering of precipitated impurities present at the defect clusters, and improved cell and process designs. Overcoming these limitations is expected to lead to 18%-20% cell efficiencies.

Sopori, B.; Chen, W. (National Renewable Energy Laboratory); Tan, T.; Plekhanov, P. (Duke University, Raleigh, NC)

1998-11-19T23:59:59.000Z

499

The performance of bifacial solar cells in prism-coupled compound parabolic concentrators  

SciTech Connect

Fixed compound parabolic concentrators that couple radiation to solar cells through a prism-shaped dielectric medium were matched to bifacial solar cell arrays. Measures of annual-average short-circuit current output relative to the output with conventional panel operation of the arrays gave optical gains of approximately four times with symmetrical but simulated bifacial arrays and approximately three times with the asymmetrical Westinghouse bifacial arrays. When passive thermosyphon cooling was provided, the power gains measured at peak solar intensity were similar to the optical gains.

Edmonds, I.R. (Queensland Univ. of Technology, Brisbane (Australia))

1992-01-01T23:59:59.000Z

500

NREL: News - NREL Reports 31.1% Efficiency for III-V Solar Cell  

NLE Websites -- All DOE Office Websites (Extended Search)

913 913 NREL Reports 31.1% Efficiency for III-V Solar Cell Conversion-efficiency mark is a world record for a two-junction solar cell measured under one-sun illumination June 24, 2013 The Energy Department's National Renewable Energy Lab has announced a world record of 31.1% conversion efficiency for a two-junction solar cell under one sun of illumination. NREL Scientist Myles Steiner announced the new record June 19 at the 39th IEEE Photovoltaic Specialists Conference in Tampa, Fla. The previous record of 30.8% efficiency was held by Alta Devices. The tandem cell was made of a gallium indium phosphide cell atop a gallium arsenide cell, has an area of about 0.25 square centimeters and was measured under the AM1.5 global spectrum at 1,000 W/m2. It was grown inverted, similar to the NREL-developed inverted metamorphic multi-junction