Optimization of Antimony Selenide Thin Film Solar Cells Performance Based on Cesium Chloride Back Contact Treatment

Abstract

Abstract: Antimony selenide (Sb₂Se₃) thin film solar cells were prepared by vapor transport deposition, and cesium chloride (CsCl) solution was used to treat the upper interface of the device. Meanwhile, a series of characterizations of the thin film and the device were also performed. The study shows that the back contact treatment of CsCl solution can not only improve the carrier collection and reduce upper interface recombination of the device, but also optimize the crystallinity, surface roughness and optoelectronic performance of thin film. Based on the device structure of FTO/CdS/Sb₂Se₃/CsCl/Au, a high-efficiency Sb₂Se₃ thin film solar cell with efficiency of 6.32% are obtained, which is 12% higher than that of the basic device. The research may provide some guidance to further development of Sb₂Se₃ thin film solar cells and other similar types of semiconductor photovoltaic devices.

Key words: Sb₂Se₃, CsCl, back contact treatment, thin film solar cell, vapor transport deposition, thin film photoelectric performance

CLC Number:

TM914.4

ZHAO Cong, GUO Huafei, QIU Jianhua, DING Jianning, YUAN Ningyi. Optimization of Antimony Selenide Thin Film Solar Cells Performance Based on Cesium Chloride Back Contact Treatment[J]. Journal of Synthetic Crystals, 2023, 52(4): 636-644.

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