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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 J.Kim G.Y.Son D.-H.Yang K.-J.Kim D.-H.Kang J.-K.Jo W.
Ewha Authors
조윌렴
SCOPUS Author ID
조윌렴scopus
Issue Date
2018
Journal Title
Solar Energy Materials and Solar Cells
ISSN
0927-0248JCR Link
Citation
Solar Energy Materials and Solar Cells vol. 183, pp. 129 - 136
Keywords
Carrier behaviorCompound precursorsKelvin probe force microscopyMetal precursorsSurface potential
Publisher
Elsevier B.V.
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
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.
DOI
10.1016/j.solmat.2018.03.050
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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