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Effect of solid-H2S gas reactions on CZTSSe thin film growth and photovoltaic properties of a 12.62% efficiency device

Title
Effect of solid-H2S gas reactions on CZTSSe thin film growth and photovoltaic properties of a 12.62% efficiency device
Authors
Son, Dae-HoKim, Seung-HyunKim, Se-YunKim, Young-IllSim, Jun-HyungPark, Si-NaeJeon, Dong-HwanHwang, Dae-KueSung, Shi-JoonKang, Jin-KyuYang, Kee-JeongKim, Dae-Hwan
DGIST Authors
Son, Dae-Ho; Kim, Seung-Hyun; Kim, Se-Yun; Kim, Young-Ill; Sim, Jun-Hyung; Park, Si-Nae; Jeon, Dong-Hwan; Hwang, Dae-KueSung, Shi-JoonKang, Jin-KyuYang, Kee-JeongKim, Dae-Hwan
Issue Date
2019-11
Citation
Journal of Materials Chemistry A, 7(44), 25279-25289
Type
Article
Article Type
Article
Keywords
SOLAR-CELLSCU2ZNSNS4SELENIZATIONPRECURSORSDEFECTS
ISSN
2050-7488
Abstract
We fabricated CZTSSe thin films using optimized SLG-Mo/Zn/Cu/Sn (MZCT) as a stacked structure and described the phenomenon of Zn elemental volatilization using the MZCT stacked structure. We introduced H2S gas to effectively control the S/(S + Se) ratio of the film in the sulfo-selenization process and to suppress Zn volatilization. Unlike during the selenization process, a stable ZnSSe thin film was formed on the precursor surface during the sulfo-selenization process. The formation of the ZnSSe thin film inhibited Znvolatilization, which facilitated control of the thin film stoichiometry and played an important role in crystal growth. In addition, the sulfo-selenization process using H2S forms a grading of the S/(S + Se) ratio in the depth direction in the ZnSSe layer. The ZnSSe layer with this property causes the band gap grading in the CZTSSe absorption layer. Finally, through our optimized annealing process, we realized a world record CZTSSe solar cell with a certified power conversion efficiency of 12.62% and a centimetre-scale (1.1761 cm2) efficiency of 11.28%. © 2019 The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/10917
DOI
10.1039/c9ta08310c
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Sung, Shi-Joon  
  • Research Interests Compound Semiconductor Materials & Processes
Files:
There are no files associated with this item.
Collection:
Division of Energy Technology1. Journal Articles


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