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- Title
Interface Band Offset Optimization to Improve the Efficiency of CuSbSe<sub>2</sub> Solar Cells.
- Authors
Wang, Ruihu; Sun, Leiyi; Wang, Hui; Peng, Zhuo; Yuan, Yujie; Xing, Yupeng; Yao, Liyong; Bi, Jinlian; Li, Wei
- Abstract
Copper antimony selenium (CuSbSe2) is considered a promising candidate for manufacturing flexible thin film solar cells. However, inappropriate band offset deteriorates the properties of CuSbSe2 solar cell devices. In this work, the effects of Cd1−xZnxS and ZnOyS1−y buffer layers on the performance of CuSbSe2 solar cells were studied with SCAPS simulation. The preliminary structure was designed, and the influence of Zn/(Zn + Cd) ratio, O/(O + S) ratio, thickness, and donor density of Cd1−xZnxS and ZnOyS1−y buffer layers on the performance of the solar cell was then investigated. The conduction band offset (CBO) of the interface between buffer layer and absorber layer was optimized. Efficiency values of 7.81% and 10.26% were obtained for the CuSbSe2 devices with Zn/(Zn + Cd) = 0.5 and O/(O + S) = 0.6, and the thickness of Cd1−xZnxS and ZnOyS1−y buffer layers was 20 nm and 30 nm, respectively.
- Subjects
SOLAR cell efficiency; BUFFER layers; SOLAR cells; PHOTOVOLTAIC power systems; CONDUCTION bands; THIN films
- Publication
Journal of Electronic Materials, 2023, Vol 52, Issue 11, p7708
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-023-10581-w