基于反萃空转的高效无机钙钛矿太阳电池  

High-efficiency inorganic perovskite solar cell based on a stripping and idling assisted growing technique

作　　者：闫慧博 周定坚 黄金成 刘均 王明[1] 罗忠明 罗溪 田梦瑶 郑婷 李贵君 徐平[1] YAN Huibo;ZHOU Dingjian;HUANG Jincheng;LIU Jun;WANG Ming;LUO Zhongming;LUO Xi;TIAN Mengyao;ZHENG Ting;LI Guijun;XU Ping(College of Physics and Optoelectronic Engineering,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China)

机构地区：[1]深圳大学物理与光电工程学院,光电子器件与系统教育部/广东省重点实验室,广东深圳518060

出　　处：《深圳大学学报（理工版）》2022年第4期377-382,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：广东省自然科学基金资助项目(2020A151501079);深港创新圈项目A资助项目(SGDX20190918105001787)。

摘　　要：铯铅碘二溴(CsPbI_(2)Br)钙钛矿具备合适的容忍因子与良好的热稳定性,是无机钙钛矿太阳电池的理想材料,而其转化效率低、工艺重复性差的缺陷,阻碍了CsPbI_(2)Br太阳电池性能的进一步提高.研究CsPbI_(2)Br无机钙钛矿太阳电池的制备工艺发现,成膜环境对CsPbI_(2)Br薄膜的均匀性、光学性质及器件性能重复性具有较大影响.提出采用反萃空转辅助生长工艺提升CsPbI_(2)Br薄膜的晶粒尺寸,提高结晶度,降低缺陷态密度,并获得14.1%的CsPbI_(2)Br太阳电池光电转换效率.反萃空转辅助生长工艺降低了周围环境氛围对薄膜质量的影响,提高了器件制备的可重复性.Cesium lead iodide dibromide(CsPbI_(2)Br)perovskite is an ideal material for inorganic perovskite solar cells due to its suitable tolerance factor and good thermal stability.However,the defects of low power conversion efficiency and poor device reproducibility hinder the further improvement of the performance of inorganic CsPbI_(2)Br solar cells.By studying the preparation process of CsPbI_(2)Br inorganic perovskite solar cells,we find that the film-forming environment has a great influence on the uniformity,optical properties and device performance repeatability of CsPbI_(2)Br films.In this paper,a stripping and idling assisted growing process strategy is proposed to obtain CsPbI_(2)Br films with large grain size,high crystallinity,and low trap-defects density.The power conversion efficiency of CsPbI_(2)Br perovskite solar cells reaches 14.1%.More importantly,this method greatly reduces the influence of ambient conditions on the film quality and improves the reproducibility of the device.

关 键 词：光电子技术 无机钙钛矿 太阳电池 CsPbI_(2)Br 反萃空转辅助生长 功率转化效率 

分 类 号：TN364.2[电子电信—物理电子学]