Effects of sodium and potassium on the photovoltaic performance of CIGS solar cells

doi:10.1109/JPHOTOV.2016.2621343

Title: Effects of sodium and potassium on the photovoltaic performance of CIGS solar cells

Abstract

Here, the deliberate introduction of K and Na into Cu(In, Ga)Se₂ (CIGS) absorbers was investigated by varying a combination of an SiO₂ diffusion barrier, coevaporation of KF with the CIGS absorber, and a KF postdeposition treatment (PDT). Devices made with no diffusion barrier and KF coevaporation treatment exhibited the highest photovoltaic conversion efficiency with the smallest overall distribution in key current density-voltage (J-V) performance metrics. Out-diffusion of Na and K from the substrate, KF coevaporation, and KF PDT all increased carrier concentration, open-circuit voltage, fill factor, and power conversion efficiency. Quantum-efficiency analysis of devices highlighted the greatest loss in the short-circuit current density due to incomplete absorption and collection. Secondary ion mass spectrometry illustrated the efficacy of the SiO₂ film as a sodium and potassium diffusion barrier, as well as their relative concentration in the absorber. Introduction of KF appeared to enhance diffusion of Na from the substrate, in agreement with previous studies.

Authors:

Raguse, John M. ^[1]; Muzzillo, Christopher P. ^[2]; Sites, James R. ^[1]; Mansfield, Lorelle ^[3]

Colorado State Univ., Fort Collins, CO (United States)
Univ. of Florida, Gainesville, FL (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)

Publication Date:: 2016-11-17

Research Org.:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; SunShot Initiative

OSTI Identifier:: 1358338

Report Number(s):: NREL/JA-5K00-68549
Journal ID: ISSN 2156-3381

Grant/Contract Number:: AC36-08GO28308

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Journal of Photovoltaics

Additional Journal Information:: Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2156-3381

Publisher:: IEEE

Country of Publication:: United States

Language:: English

Subject:: 14 SOLAR ENERGY; CIGS; passivation; photovoltaic (PV) cells; thin films

Citation Formats


                    Raguse, John M., Muzzillo, Christopher P., Sites, James R., and Mansfield, Lorelle. Effects of sodium and potassium on the photovoltaic performance of CIGS solar cells.  United States: N. p., 2016. 
        Web.  doi:10.1109/JPHOTOV.2016.2621343.

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                    Raguse, John M., Muzzillo, Christopher P., Sites, James R., & Mansfield, Lorelle. Effects of sodium and potassium on the photovoltaic performance of CIGS solar cells.  United States.  doi:10.1109/JPHOTOV.2016.2621343.

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                    Raguse, John M., Muzzillo, Christopher P., Sites, James R., and Mansfield, Lorelle. Thu .  
        "Effects of sodium and potassium on the photovoltaic performance of CIGS solar cells".  United States.  doi:10.1109/JPHOTOV.2016.2621343.  https://www.osti.gov/servlets/purl/1358338.

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@article{osti_1358338,

  title        = {Effects of sodium and potassium on the photovoltaic performance of CIGS solar cells},

  author       = {Raguse, John M. and Muzzillo, Christopher P. and Sites, James R. and Mansfield, Lorelle},

  abstractNote = {Here, the deliberate introduction of K and Na into Cu(In, Ga)Se2 (CIGS) absorbers was investigated by varying a combination of an SiO2 diffusion barrier, coevaporation of KF with the CIGS absorber, and a KF postdeposition treatment (PDT). Devices made with no diffusion barrier and KF coevaporation treatment exhibited the highest photovoltaic conversion efficiency with the smallest overall distribution in key current density-voltage (J-V) performance metrics. Out-diffusion of Na and K from the substrate, KF coevaporation, and KF PDT all increased carrier concentration, open-circuit voltage, fill factor, and power conversion efficiency. Quantum-efficiency analysis of devices highlighted the greatest loss in the short-circuit current density due to incomplete absorption and collection. Secondary ion mass spectrometry illustrated the efficacy of the SiO2 film as a sodium and potassium diffusion barrier, as well as their relative concentration in the absorber. Introduction of KF appeared to enhance diffusion of Na from the substrate, in agreement with previous studies.},

  doi          = {10.1109/JPHOTOV.2016.2621343},

  journal      = {IEEE Journal of Photovoltaics},

  number       = 1,

  volume       = 7,

  place        = {United States},

  year         = {2016},

  month        = {11}

}

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DOI: 10.1109/JPHOTOV.2016.2621343

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Works referencing / citing this record:

Impact of heat-light soaking on potassium fluoride treated CIGS solar cells with CdS buffer layer
journal, November 2017

Khatri, Ishwor; Shudo, Kosuke; Matsuura, Junpei
Progress in Photovoltaics: Research and Applications, Vol. 26, Issue 3
DOI: 10.1002/pip.2962

Revealing the beneficial role of K in grain interiors, grain boundaries, and at the buffer interface for highly efficient CuInSe ₂ solar cells
journal, June 2018

Muzzillo, Christopher P.; Poplawsky, Jonathan D.; Tong, Ho Ming
Progress in Photovoltaics: Research and Applications, Vol. 26, Issue 10
DOI: 10.1002/pip.3022

Effect of heat-bias soaking on cesium fluoride-treated CIGS thin film solar cells
journal, July 2018

Khatri, Ishwor; Matsuura, Junpei; Sugiyama, Mutsumi
Progress in Photovoltaics: Research and Applications, Vol. 27, Issue 1
DOI: 10.1002/pip.3067

Effect of Combined Alkali (KF + CsF) Post-Deposition Treatment on Cu(InGa)Se ₂ Solar Cells
journal, August 2018

Kim, Shinho; Tampo, Hitoshi; Shibata, Hajime
physica status solidi (RRL) - Rapid Research Letters, Vol. 12, Issue 10
DOI: 10.1002/pssr.201800372

Surfactant modified Bi2(S0.3Se0.7)3 nanoflakes for photo electrochemical cell application
journal, March 2018

Sahare, Sanjay; Salunkhe, Manauti; Ghoderao, Prachi
Journal of Materials Science: Materials in Electronics, Vol. 29, Issue 11
DOI: 10.1007/s10854-018-8942-2

Structural Characterization, Optical Absorption and Electrical Conduction in Ordered Defect Compound Cu3In5Se9 of the Ternary Cu-In-Se Semiconductor System
journal, November 2019

Marín, G.; Singh, D. P.; Rincón, C.
Journal of Electronic Materials, Vol. 49, Issue 1
DOI: 10.1007/s11664-019-07816-0

Formation of unique nanocrystalline Cu-In-Se bulk pn homojunctions for opto-electronic devices
journal, July 2018

Menezes, Shalini; Samantilleke, Anura
Scientific Reports, Vol. 8, Issue 1
DOI: 10.1038/s41598-018-29457-9

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Title: Effects of sodium and potassium on the photovoltaic performance of CIGS solar cells

Abstract

Citation Formats

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