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High efficiency bifacial Cu2ZnSnSe4 thin-film solar cells on transparent conducting oxide glass substrates

Title
High efficiency bifacial Cu2ZnSnSe4 thin-film solar cells on transparent conducting oxide glass substrates
Authors
Kim, Jung-SikKang, Jin-KyuHwang, Dae-Kue
DGIST Authors
Kang, Jin-KyuHwang, Dae-Kue
Issue Date
2016-09
Citation
APL Materials, 4(9)
Type
Article
Article Type
Article
Keywords
Bifacial IlluminationCopperDoped Tin OxidesEfficiencyHigh-EfficiencyIndiumIndium Tin OxideMolybdenum OxidePower EfficiencySemiconducting Selenium CompoundsSolar CellsSubstratesThin-Film Solar CellsThin-FilmsTinTin OxidesTransparent Conducting OxideTransparent Conducting Oxide GlassVacuum Process
ISSN
2166-532X
Abstract
In this work, transparent conducting oxides (TCOs) have been employed as a back contact instead of Mo on Cu2ZnSnSe4 (CZTSe) thin-film solar cells in order to examine the feasibility of bifacial Cu2ZnSn(S,Se)4 (CZTSSe) solar cells based on a vacuum process. It is found that the interfacial reaction between flourine doped tin oxide (FTO) or indium tin oxide (ITO) and the CZTSe precursor is at odds with the conventional CZTSe/Mo reaction. While there is no interfacial reaction on CZTSe/FTO, indium in CZTSe/ITO was significantly diffused into the CZTSe layers; consequently, a SnO2 layer was formed on the ITO substrate. Under bifacial illumination, we achieved a power efficiency of 6.05% and 4.31% for CZTSe/FTO and CZTSe/ITO, respectively. © 2016 Author(s).
URI
http://hdl.handle.net/20.500.11750/5083
DOI
10.1063/1.4962145
Publisher
American Physical Society
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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