Cite this article:
Xue Min, Jiangjian Shi, Linbao Guo, Qing Yu, Pengpeng Zhang, Qingwen Tian, Dongmei Li, Yanhong Luo, Huijue Wu, Qingbo Meng, Sixin Wu. Regulation of Zn/Sn ratio in kesterite absorbers to boost 10% efficiency of Cu2ZnSn(S, Se)4 solar cellsJ. Chin. Phys. B, 2018, 27(1): 016402.
Xue Min, Jiangjian Shi, Linbao Guo, Qing Yu, Pengpeng Zhang, Qingwen Tian, Dongmei Li, Yanhong Luo, Huijue Wu, Qingbo Meng, Sixin Wu. Regulation of Zn/Sn ratio in kesterite absorbers to boost 10% efficiency of Cu2ZnSn(S, Se)4 solar cellsJ. Chin. Phys. B, 2018, 27(1): 016402.
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Regulation of Zn/Sn ratio in kesterite absorbers to boost 10% efficiency of Cu2ZnSn(S, Se)4 solar cells
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Abstract
The Zn/Sn ratio in Cu2ZnSn(S, Se)4 (CZTSSe) films has been regulated to control the composition-related phase, defect, and photoelectric properties for high performance kesterite solar cells. It is found that the increase in the Zn/Sn ratio can slightly narrow the energy band gap to extend the light absorption range and improve the photocurrent. Optimal Zn/Sn ratio of 1.39 in CZTSSe film is obtained with the least secondary phase, the lowest defect density, and the longest charge recombination lifetime. Up to 10.1% photoelectric conversion efficiency has been achieved by this composition regulation. -
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