Selective coordination of polyazin sapanisertib with halide vacancy for printable mesoscopicperovskite solar cells  

作　　者：Dun Ma Xiujun He Jingshan He Huanxin Guo Yongzhen Wu Wenjun Wu Weihong Zhu 

机构地区：[1]Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center,Shanghai Key Laboratory of Functional Materials Chemistry,East ChinaUniversityof Scienceand Technology,Shanghai 200237,China [2]Yaopu(Shanghai)Pharmaceutical Technology Co.,Ltd.,Shanghai 201108,China

出　　处：《Chinese Chemical Letters》2023年第12期486-490,共5页中国化学快报（英文版）

基　　金：supported financially by the National Natural Science Foundation of China(Nos.21421004 and 22075083);the Programme of Introducing Talents of Discipline to Universities(No.B16017).

摘　　要：The mitigation of under-coordinated Pb^(2+)(halide vacancy)defect remains an imperative challenge in the perovskite solar cells,especially printable mesoscopic perovskite solar cells(FP-PsCs).Here we re port a commercial-available polyazin anticancer drug Sapanisertib as coordination passivator of halide vacancies in FP-PSCs,thereby achieving the photoelectric conversion efficiency(PCE)to 18.46%,along with a record certified PCE of 18.27%.In polazin Sapanisertib(Sap),there exists two kinds of nitrogen atoms:in-aromatic ring(in purine and oxazole rings,IAR-Ns)and out-aromatic ring(substituted amino groups,OAR-Ns).Through multiple characterizations,and DFT calculations show that substituted amino groups OAR-Ns hardly get interaction with the halide vacancy due to the distribution of charge density in Sapanisertib.Our work suggests that the selective coordination is of great significance for the design of high-performance passivators for printable mesoscopic perovskite solar cells.

关 键 词：Sapanisertib Lead vacancies COORDINATION PASSIVATOR PEROVSKITE 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB34[一般工业技术—材料科学与工程]