共溶剂去除钙钛矿太阳能电池残留PbI_(2)的研究  

Study on the removal for residue PbI_(2) in perovskite solar cells using co-solvent

作　　者：毛清华 王磊[1] 徐勇俊 程露 盛钰清 MAO Qinghua;WANG Lei;XU Yongjun;CHENG Lu;SHENG Yuqing(School of Microelectronics and Data Science,Anhui University of Technology,Maanshan 243032,China)

机构地区：[1]安徽工业大学微电子与数据科学学院,安徽马鞍山243032

出　　处：《有色金属材料与工程》2024年第6期10-15,52,共7页Nonferrous Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(62241501);安徽省高校自然科学研究重点项目(2023AH051087)。

摘　　要：钙钛矿材料凭借其优异的性能可作为太阳能器件吸收层而备受关注。针对溶液法制备的钙钛矿吸收层薄膜残留PbI_(2)问题,提出了去除—钝化—退火3步法策略。首先采用正丁醇与环己烷(体积比为1∶4)的共溶剂对钙钛矿薄膜进行清洗,随后使用含有4-三氟甲氧基苯乙基碘化胺(phenethylammonium iodide with trifluoromethoxy groups,CF_(3)O-PEAI)的叔戊醇与环己烷(体积比为1∶4)的混合溶液钝化表面,最后进行退火处理。通过该策略不但能有效去除钙钛矿薄膜表面残留PbI_(2),且能使晶粒致密性更好、晶粒面积增大,整体优化了表面结晶形貌。制备的器件光电转换效率从17.93%提升至20.59%,相对提高了14.80%。研究结果表明,采用该策略在有效去除残留PbI_(2)的同时,还能较好地修复清洗后的表面.,最终使器件性能得到了提升。Perovskite materials have attracted significant attentions as the absorbing layers in solar devices due to their outstanding performances.This study addresses the issue of residual PbI_(2) in perovskite absorber layers prepared via solution methods.A three-step strategy is presented involving cleaning-passivation-annealing.Firstly,the perovskite films were cleaned with a co-solvent with the volume ratio of n-butanol to cyclohexane of 1∶4.Subsequently,the surface was passivated with a volume ratio of tert-amyl alcohol to cyclohexane solution containing phenethylammonium iodide with trifluoromethoxy groups(CF_(3)O-PEAI)of 1∶4.Finally,annealing was performed.The strategy not only effectively removes residual lead iodide from the perovskite film surface but also improves grain density and increases the grain area,thereby optimizes the overall surface crystal morphology.The power conversion efficiency of the devices increases from 17.93%to 20.59%with a relative increase of 14.80%.The results show that this strategy effectively remove the residual PbI_(2) and repair the cleaned surface,and finally improve the performance of the device.

关 键 词：钙钛矿太阳能电池 PbI_(2) 共溶剂 

分 类 号：TN366[电子电信—物理电子学] TM914[电气工程—电力电子与电力传动]