摘要
It is of great significance to design and synthesize highly efficient n-type organic small molecules as electron-transporting layer(ETL) materials to achieve high performance planar perovskite solar cells(PVKSCs) with lowtemperature solution-processing. In this article, acenaphthylene-imide based small molecules AI1, AI2 and AI3 were developed with lower-lying LUMO energy levels and were further applied as non-fullerene ETL materials for solutionprocessed PVKSCs. When TiO2/AIX bilayer was used as ETL,an average power conversion efficiency(PCE) of 15.0% was achieved for TiO2/AI1 based PVKSCs with conventional configuration, while pristine TiO2 based devices presented a PCE of 11.7% only. All the results demonstrate that acenaphthylene-imide derivatives could be promising ETL materials to accomplish low-temperature solution-processed high performance PVKSCs.
设计合成高效n型小分子半导体作为钙钛矿太阳能电池的电子传输层对实现低温、可溶液加工的钙钛矿太阳能电池具有重要意义.本文合成了三个低LUMO能级、基于苊烯酰二亚胺的小分子受体材料AI1, AI2, AI3,系统表征了其光物理性质及电化学、热力学性质,研究了其在钙钛矿太阳能电池器件中的应用.当使用TiO_2/AI1作为电子传输层时,钙钛矿太阳能电池的平均光电转换效率为15%,比单独TiO_2电子传输层11.7%的平均光电转换效率有较大提升,表明基于苊烯酰二亚胺的小分子AI1, AI2, AI3是良好的电子传输层材料,可实现低温、可溶液加工的高效钙钛矿太阳能电池.
作者
Jiawei Shao
Xing Guo
Nannan Shi
Xinglin Zhang
Shuli Liu
Zhenhua Lin
Baomin Zhao
Jingjing Chang
Jinjun Shao
Xiaochen Dong
邵佳伟;郭兴;侍男男;张幸林;刘书利;林珍华;赵保敏;常晶晶;邵进军;董晓臣(Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech);State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Shaanxi Joint Key Laboratory of Graphene, School of Microelectronics, Xidian University;Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications)
基金
supported by the National Natural Science Foundation of China (61604071, 61525402, 61604119, 61704131 and 61775095)
Natural Science Foundation of Jiangsu Province (BK20161012)
Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJZZ16_0139)
SICAM Scholarship (38600001)
