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:
-
- 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:
- 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.
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.
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.
@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}
}
Web of Science
Works referencing / citing this record:
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- Khatri, Ishwor; Shudo, Kosuke; Matsuura, Junpei
- Progress in Photovoltaics: Research and Applications, Vol. 26, Issue 3
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- Muzzillo, Christopher P.; Poplawsky, Jonathan D.; Tong, Ho Ming
- Progress in Photovoltaics: Research and Applications, Vol. 26, Issue 10
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- Progress in Photovoltaics: Research and Applications, Vol. 27, Issue 1
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- Kim, Shinho; Tampo, Hitoshi; Shibata, Hajime
- physica status solidi (RRL) - Rapid Research Letters, Vol. 12, Issue 10
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- Sahare, Sanjay; Salunkhe, Manauti; Ghoderao, Prachi
- Journal of Materials Science: Materials in Electronics, Vol. 29, Issue 11
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- Marín, G.; Singh, D. P.; Rincón, C.
- Journal of Electronic Materials, Vol. 49, Issue 1
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- Menezes, Shalini; Samantilleke, Anura
- Scientific Reports, Vol. 8, Issue 1