Spatial configuration engineering of perylenediimide-based non-fullerene electron transport materials for efficient inverted perovskite solar cells  

作　　者：Mengmeng Zheng Yawei Miao Ali Asgher Syed Cheng Chen Xichuan Yang Liming Ding Huaming Li Ming Cheng 

机构地区：[1]Institute for Energy Research,School of Materials Science&Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China [2]State Key Laboratory of Fine Chemicals,Institute of Artificial Photosynthesis,DUT−KTH Joint Education and Research Center on Molecular Devices,Dalian University of Technology(DUT),Dalian 116024,Liaoning,China [3]Center for Excellence in Nanoscience(CAS),Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS),National Center for Nanoscience and Technology,Beijing 100190,China

出　　处：《Journal of Energy Chemistry》2021年第5期374-382,共9页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grants 21805114,21905119);Key Research and Development program of Jiangsu Province(BE2019009-2);Natural Science Foundation of Jiangsu province(BK20180869,BK20180867);China Postdoctoral Science Foundation(2019M651741),Top talents in Jiangsu province(XNY066);the Jiangsu University Foundation(17JDG032,17JDG031);Hightech Research Key laboratory of Zhenjiang(SS2018002);the State Key Laboratory of Fine Chemicals(KF1902)。

摘　　要：Due to their excellent photoelectron chemical properties and suitable energy level alignment with perovskite,perylene diimide(PDI)derivatives are competitive non-fullerene electron transport material(ETM)candidates for perovskite solar cells(PSCs).However,the conjugated rigid plane structure of PDI units result in PDI-based ETMs tending to form large aggregates,limiting their application and photovoltaic performance.In this study,to restrict aggregation and further enhance the photovoltaic performance of PDI-type ETMs,two PDI-based ETMs,termed PDO-PDI2(dimer)and PDO-PDI3(trimer),were constructed by introducing a phenothiazine 5,5-dioxide(PDO)core building block.The research manifests that the optoelectronic properties and film formation property of PDO-PDI2 and PDO-PDI3 were deeply affected by the molecular spatial configuration.Applied in PSCs,PDO-PDI3 with threedimensional spiral molecular structure,exhibits superior electron extraction and transport properties,further achieving the best PCE of 18.72%and maintaining 93%of its initial efficiency after a 720-h aging test under ambient conditions.

关 键 词：Non-fullerene Electron transport material Perovskite solar cell Inverted structure 

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]