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Optimization of the ZnS Buffer Layer by Chemical Bath Deposition for Cu(In,Ga)Se-2 Solar Cells

Title
Optimization of the ZnS Buffer Layer by Chemical Bath Deposition for Cu(In,Ga)Se-2 Solar Cells
Authors
Jeon, DH[Jeon, Dong-Hwan]Hwang, DK[Hwang, Dae-Kue]Kim, DH[Kim, Dae-Hwan]Kang, JK[Kang, Jin-Kyu]Lee, CS[Lee, Chang-Seop]
DGIST Authors
Jeon, DH[Jeon, Dong-Hwan]; Hwang, DK[Hwang, Dae-Kue]; Kim, DH[Kim, Dae-Hwan]; Kang, JK[Kang, Jin-Kyu]
Issue Date
2016-05
Citation
Journal of Nanoscience and Nanotechnology, 16(5), 5398-5402
Type
Article
Article Type
Article
Keywords
AmmoniaAmmonia ConcentrationsBuffer LayersCadmium SulfideCd-FreeChemical-Bath DepositionCIGSComplexing AgentsDepositionDeposition ConditionsDeposition RatesGalliumOptical WaveguidesOptimized Deposition ConditionsPost Heat-TreatmentSemiconducting Selenium CompoundsSolar CellsZincZinc SulfideZnS
ISSN
1533-4880
Abstract
We evaluated a ZnS buffer layer prepared using a chemical bath deposition (CBD) process for application in cadmium-free Cu(In,Ga)Se2 (CIGS) solar cells. The ZnS buffer layer showed good transmittance (above 90%) in the spectral range from 300 to 800 nm and was non-toxic compared with the CdS buffer layers normally used in CIGS solar cells. The CBD process was affected by several deposition conditions. The deposition rate was dependent on the ammonia concentration (complexing agent). When the ammonia concentration was either too high or low, a decrease in the deposition rate was observed. In addition, post heat treatments at high temperatures had detrimental influences on the ZnS buffer layers because portions of the ZnS thin films were transformed into ZnO. With optimized deposition conditions, a CIGS solar cell with a ZnS buffer layer showed an efficiency of 14.18% with a 0.23 cm2 active area under 100 mW/cm2 illumination. Copyright © 2016 American Scientific Publishers All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2690
DOI
10.1166/jnn.2016.12217
Publisher
American Scientific Publishers
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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