CdBr2对CsPbBr3钙钛矿晶界处缺陷态调控及光电性能影响

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (5): 24-29.

CdBr₂对CsPbBr₃钙钛矿晶界处缺陷态调控及光电性能影响

刘文武^*1,2, 刘玉臣^1,2, 崔重阳^1,2, 牛晟韬^1,2, 冉奋^1,2, 阙郁伦^3,4

1.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
2.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
3.国立清华大学材料科学与工程系, 台湾新竹 30013;
4.国立清华大学基础知识与应用科学前沿研究中心, 台湾新竹 30013

收稿日期:2021-03-17 出版日期:2021-10-28 发布日期:2021-11-18
通讯作者: 刘文武(1987-),男,甘肃兰州人,博士,副研究员.Email:wwliu@lut.edu.cn
基金资助:
甘肃省科技计划资助(21JR7RA256)

Effect of CdBr₂ on defect state regulation and photoelectric properties of CsPbBr₃ perovskite grain boundary

LIU Wen-wu^1,2, LIU Yu-cheng^1,2, CUI Chong-yang^1,2, NIU Sheng-tao^1,2 RAN Fen^1,2, QUE Yu-lun^3,4

1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. College of Materials Science and Engineering, Lanzhou Univ. of Tech.,Lanzhou 730050, China;
3. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, China;
4. Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, China

Received:2021-03-17 Online:2021-10-28 Published:2021-11-18

摘要/Abstract

摘要： 通过CdBr₂对全无机CsPbBr₃钙钛矿薄膜进行钝化处理,研究不同浓度CdBr₂的异丙醇溶液对全无机CsPbBr₃钙钛矿太阳能电池光电性能的影响.结果表明:CdBr₂钝化CsPbBr₃钙钛矿表面后,降低了钙钛矿表面的Br空位缺陷密度,抑制了非辐射复合,促进了光生电子和空穴的抽取和传输,因此降低了界面光电子复合损失,使全无机钙钛矿太阳能电池器件的光电转换效率从6.58%提高到8.19%,开路电压从1.368 V提高到1.531 V.

关键词: 全无机钙钛矿太阳能电池, CsPbBr₃, 缺陷钝化, PbBr₂

Abstract: The effects of different concentrations of isopropanol solution of CdBr₂ on the photoelectric properties of CsPbBr₃perovskite solar cells were studied by passivating CsPbBr₃perovskite films with CdBr₂. The results show that the introduction of CdBr₂ to the surface of CsPbBr₃perovskite, can decreases the density of defects at the surface, suppresses nonradiative recombination and promotes the extraction and diffusion of photogenerated electrons and holes. Therefore, the interface recombination loss is reduced. The photoelectric conversion efficiency of all inorganic CsPbBr₃perovskite solar cell devices were increased from 6.58% to 8.19%, and the V_ocwas increased from 1.368 V to 1.531 V.

Key words: all inorganic perovskite solar cell, CsPbBr₃, defect passivation, PbBr₂

中图分类号:

TB34

刘文武, 刘玉臣, 崔重阳, 牛晟韬, 冉奋, 阙郁伦. CdBr₂对CsPbBr₃钙钛矿晶界处缺陷态调控及光电性能影响[J]. 兰州理工大学学报, 2021, 47(5): 24-29.

LIU Wen-wu, LIU Yu-cheng, CUI Chong-yang, NIU Sheng-tao RAN Fen, QUE Yu-lun. Effect of CdBr₂ on defect state regulation and photoelectric properties of CsPbBr₃ perovskite grain boundary[J]. Journal of Lanzhou University of Technology, 2021, 47(5): 24-29.

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CdBr₂对CsPbBr₃钙钛矿晶界处缺陷态调控及光电性能影响

Effect of CdBr₂ on defect state regulation and photoelectric properties of CsPbBr₃ perovskite grain boundary

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