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High photo-conversion efficiency Cu2ZnSn(S,Se)4 thin-film solar cells prepared by compound-precursors and metal-precursors

Title
High photo-conversion efficiency Cu2ZnSn(S,Se)4 thin-film solar cells prepared by compound-precursors and metal-precursors
Authors
Kim, JuranKim, Gee YeongSon, Dae HoYang, Kee JeongKim, Dae-HwanKang, Jin KyuJo, William
DGIST Authors
Kim, Juran; Kim, Gee Yeong; Son, Dae Ho; Yang, Kee JeongKim, Dae-HwanKang, Jin Kyu; Jo, William
Issue Date
2018-08
Citation
Solar Energy Materials and Solar Cells, 183, 129-136
Type
Article
Article Type
Article
Author Keywords
Surface potentialKelvin probe force microscopyMetal precursorsCompound precursorsCarrier behavior
Keywords
GRAIN-BOUNDARIESCU2ZNSNS4CZTSROUTES
ISSN
0927-0248
Abstract
Cu2ZnSn(S,Se)4 (CZTSSe) thin-film solar cells have been fabricated by various methods. Sputtering is one of the vacuum processes that can be used for the growth of the precursors. In this study, CZTSSe thin-films that were fabricated using metal-precursors and with a high efficiency of 12.3% were examined in a comparison with CZTSSe thin-films that were fabricated using compound-precursors, whose efficiency is 9.1%. Especially, the Kelvin probe force microscopy (KPFM) analysis and local current measurement by conductive atomic force microscopy (c-AFM) show that their local electrical properties indicate completely opposite results. The grain boundaries (GBs) has a downward surface potential bending, and this repelled the minority carriers into the intragrains (IGs) in the sample from the metal-precursors. Therefore, we originally verified the differences between the carrier behaviors and the current flows on the surface. © 2018 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/6282
DOI
10.1016/j.solmat.2018.03.050
Publisher
Elsevier BV
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Energy Technology1. Journal Articles


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