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Effects of S and Se contents on the physical and photovoltaic properties of Cu2ZnSn(S-X, Se1-X)(4) thin films: achieving a PCE of 9.47%

Title
Effects of S and Se contents on the physical and photovoltaic properties of Cu2ZnSn(S-X, Se1-X)(4) thin films: achieving a PCE of 9.47%
Authors
Son, Dae-HoKim, Young-IllKim, Seung-HyunNam, DahyunCheong, HyeonsikKang, Jin-KyuYang, Kee-JeongKim, Dae-Hwan
DGIST Authors
Son, Dae-Ho; Kang, Jin-KyuYang, Kee-JeongKim, Dae-Hwan
Issue Date
2019-10
Citation
Journal of Materials Chemistry A, 7(40), 22986-22995
Type
Article
Article Type
Article
Keywords
SOLAR-CELLSSULFO-SELENIZATIONSNSPRECURSORSGROWTH
ISSN
2050-7488
Abstract
CZTSSe absorbers are synthesized by a one-step annealing process from Cu, SnS and ZnS stacks prepared by sputtering deposition. CZTSSe thin films are fabricated by a selenization process using an optimized precursor stack structure. The selenization temperature has a strong influence on the phase and reactions of the elements in the films. CZTSSe formation is initially triggered by the interaction of Cu with Sn(S, Se) to form CuSn(S, Se) compounds, which then react with ZnS. CZTSSe films obtained at 590 °C exhibit a kesterite structure. Sulfo-selenization is performed using an optimized selenization process. Based on the mass ratio of the chalcogen sources, selenium disulfide and selenium, the effect of the S/(S + Se) compositional ratio on the structural and morphological properties of the as-grown films and the optoelectronic parameters of solar cells fabricated using these absorber films are studied. Using this single-step sulfo-selenization method, CZTSSe devices with conversion efficiencies up to 9.47% are obtained. This journal is © The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/10955
DOI
10.1039/c9ta08319g
Publisher
Royal Society of Chemistry
Related Researcher
Files:
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Collection:
Division of Energy Technology1. Journal Articles


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