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Effect of ZnO Layer Thickness on Efficiency of Cu(In,Ga)Se-2 Thin-film Solar Cells

Title
Effect of ZnO Layer Thickness on Efficiency of Cu(In,Ga)Se-2 Thin-film Solar Cells
Authors
Kim, C[Kim, Chan]Jo, HJ[Jo, Hyun-Jun]Kim, DH[Kim, Dae-Hwan]Son, DH[Son, Dae-Ho]Lee, DH[Lee, Dong-Ha]Rhee, I[Rhee, Ilsu]
DGIST Authors
Kim, C[Kim, Chan]; Jo, HJ[Jo, Hyun-Jun]; Kim, DH[Kim, Dae-Hwan]; Son, DH[Son, Dae-Ho]; Lee, DH[Lee, Dong-Ha]
Issue Date
2012
Citation
Molecular Crystals and Liquid Crystals, 565, 52-58
Type
Article
Article Type
Article
Keywords
Cadmium CompoundsCadmium SulfideChemical-Bath DepositionCIGS Thin FilmsCo-EvaporationCo-EvaporationsCu(In, Ga)SeCu(In, Ga)Se2EfficiencyElectrical CharacteristicEvaporationFilm ThicknessGalliumI-ZnOLayer ThicknessMolybdenumPhase TransitionsRF-Magnetron SputteringSemiconducting Selenium CompoundsSoda Lime GlassSolar CellSolar CellsThin-Film Solar CellsThin-FilmsVapor DepositionZinc OxideZnOZnO Layers
ISSN
1542-1406
Abstract
The effect of intrinsic ZnO(i-ZnO) layer thickness on the efficiency of Cu(In,Ga)Se 2 (CIGS) thin film solar cells was investigated using ITO/ZnO/CdS/CIGS/Mo structures. CIGS thin films were deposited on Mo-coated soda-lime glass using co-evaporation. CdS buffer layers of about 50nm thickness were then grown by chemical bath deposition on the top of CIGS layer. Finally, the ZnO and ITO layers were deposited using rf-magnetron sputtering, resulting in solar cells with ITO/ZnO/CdS/CIGS/Mo structure. From the optical and electrical characteristics of the solar cells, we found a close relationship between the transmittance of the ZnO layer and the efficiency of the solar cells. Several characteristics improved for solar cells with a 50 nm thick ZnO layer relative to those with both 90 nm thick and no ZnO layer. Therefore, we conclude that the optimum ZnO thickness for CIGS-based solar cells is around 50 nm. © 2012 Kyungil University.
URI
http://hdl.handle.net/20.500.11750/3416
DOI
10.1080/15421406.2012.692227
Publisher
Taylor and Francis Ltd.
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles
Convergence Research Center for Wellness1. Journal Articles
Convergence Research Center for Solar Energy1. Journal Articles


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