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Title: Oriented Growth of Al2O3:ZnO Nanolaminates for Use as Electron-Selective Electrodes in Inverted Polymer Solar Cells

Journal Article · · Advanced Functional Materials

Atomic layer deposition is used to synthesize Al{sub 2}O{sub 3}:ZnO(1:x) nanolaminates with the number of deposition cycles, x, ranging from 5 to 30 for evaluation as optically transparent, electron-selective electrodes in polymer-based inverted solar cells. Al{sub 2}O{sub 3}:ZnO(1:20) nanolaminates are found to exhibit the highest values of electrical conductivity (1.2 x 10{sup 3} S cm{sup 01}; more than six times higher than for neat ZnO films), while retaining a high optical transmittance ({>=}80% in the visible region) and a low work function (4.0 eV). Such attractive performance is attributed to the structure (ZnO crystal size and crystal alignment) and doping level of this intermediate Al{sub 2}O{sub 3}:ZnO film composition. Polymer-based inverted solar cells using poly(3-hexylthiophene) (P3HT):phenyl-C{sub 61}-butyric acid methyl ester (PCBM) mixtures in the active layer and Al{sub 2}O{sub 3}:ZnO(1:20) nanolaminates as transparent electron-selective electrodes exhibit a power conversion efficiency of 3% under simulated AM 1.5 G, 100 mW cm{sup -2} illumination.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1047349
Report Number(s):
NREL/JA-5200-55326; TRN: US201216%%209
Journal Information:
Advanced Functional Materials, Vol. 22, Issue 7; ISSN 1616-301X
Country of Publication:
United States
Language:
English

References (38)

Highly efficient inverted organic photovoltaics using solution based titanium oxide as electron selective contact journal December 2006
Inverted bulk-heterojunction organic photovoltaic device using a solution-derived ZnO underlayer journal October 2006
Efficient inverted polymer solar cells journal June 2006
Air-stable inverted flexible polymer solar cells using zinc oxide nanoparticles as an electron selective layer journal June 2008
Inverted polymer solar cells with amorphous indium zinc oxide as the electron-collecting electrode journal January 2010
Electrical and Optical Properties of ZnO Processed by Atomic Layer Deposition in Inverted Polymer Solar Cells journal October 2010
The role of buffer layers in polymer solar cells journal January 2011
S-shaped current-voltage characteristics of organic solar devices journal September 2010
Characterization of Inverted-Type Organic Solar Cells with a ZnO Layer as the Electron Collection Electrode by ac Impedance Spectroscopy journal September 2009
Doped ZnO thin films as anode materials for organic light-emitting diodes journal December 2002
Organic solar cells on indium tin oxide and aluminum doped zinc oxide anodes journal August 2007
Indium-free transparent organic light emitting diodes with Al doped ZnO electrodes grown by atomic layer and pulsed laser deposition journal August 2008
Organic photovoltaic devices with Ga-doped ZnO electrode journal January 2007
High-performance pentacene field-effect transistors using Al2O3 gate dielectrics prepared by atomic layer deposition (ALD) journal December 2007
Encapsulation of pentacene/C60 organic solar cells with Al2O3 deposited by atomic layer deposition journal June 2007
High-Speed Spatial Atomic-Layer Deposition of Aluminum Oxide Layers for Solar Cell Passivation journal July 2010
Growth of ZnO/Al2O3 Alloy Films Using Atomic Layer Deposition Techniques journal February 2003
Characteristics of Organic Light Emitting Diodes with Al-Doped ZnO Anode Deposited by Atomic Layer Deposition journal January 2005
Transparent ZnO-TFT Arrays Fabricated by Atomic Layer Deposition journal January 2008
Properties of ZnO/Al[sub 2]O[sub 3] Alloy Films Grown Using Atomic Layer Deposition Techniques journal January 2003
In Situ Analysis of Dopant Incorporation, Activation, and Film Growth during Thin Film ZnO and ZnO:Al Atomic Layer Deposition journal November 2009
Structural and Electrical Properties of Atomic Layer Deposited Al-Doped ZnO Films journal November 2010
A comprehensive review of ZnO materials and devices journal August 2005
Deposition of ZnO thin films on SiO2/Si substrate with Al2O3 buffer layer by radio frequency magnetron sputtering for high frequency surface acoustic wave devices journal April 2009
Specific contact resistance at metal/carbon nanotube interfaces journal January 2009
Recent advances in processing of ZnO
  • Pearton, S. J.; Norton, D. P.; Ip, K.
  • Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 22, Issue 3 https://doi.org/10.1116/1.1714985
journal January 2004
On the optical band gap of zinc oxide journal May 1998
Anomalous Optical Absorption Limit in InSb journal February 1954
The Interpretation of the Properties of Indium Antimonide journal October 1954
Transparent and conductive ZnO:Al thin films prepared by sol-gel dip-coating journal January 2004
Pollmann-Büttner variational method for excitonic polarons journal December 1978
Energetics of metal–organic interfaces: New experiments and assessment of the field journal March 2009
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Projector augmented-wave method journal December 1994
Generalized Gradient Approximation Made Simple journal October 1996
Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study journal January 1998
Ab-initio valence band spectra of Al, In doped ZnO journal February 2009