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Fabrication of all-inorganic CsPbBr3 perovskite solar cells with SnCl2 interface modification
Author NameAffiliationE-mail
YIN Xiaoyao Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China  
ZHU Wenhao Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China  
SHI Puyao Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China  
LI Zongsheng Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China  
WANG Yichao Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China  
ZHU Nengmin Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China  
WANG Yang Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China  
SUN Weihai Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China sunweihai@hqu.edu.cn 
Abstract: To address the issue of charge carrier non radiative recombination in CsPbBr3 perovskite solar cells, which limits the improvement of their photoelectric conversion efficiency, we propose a method of spin-coating a 1.5 mg·mL-1 SnCl2 solution onto the TiO2 surface to effectively enhance the crystallinity and surface morphology of the perovskite film, thereby reducing non radiative recombination of photogenerated carriers and improving carrier extraction and transport capabilities. Experimental results showed that modifying the TiO2 surface with SnCl2 increased the device's maximum open-circuit voltage (VOC) to 1.59 V, short-circuit current density (JSC) to 7.62 mA· cm-2, and fill factor (FF) of 81.35%. At the same time, the photoelectric conversion efficiency (PCE) improved from 8.01% to 9.92%.
Keywords: all-inorganic CsPbBr3 perovskite solar cell  charge carrier  TiO2  non-radiative recombination  SnCl2
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YIN Xiaoyao,ZHU Wenhao,SHI Puyao,LI Zongsheng,WANG Yichao,ZHU Nengmin,WANG Yang,SUN Weihai.Fabrication of all-inorganic CsPbBr3 perovskite solar cells with SnCl2 interface modification[J].Chinese Journal of Inorganic Chemistry,2025,41(3):469-479.
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Chinese Journal of Inorganic Chemistry