Cross-linkable fullerene interfacial contacts for enhancing humidity stability of inverted perovskite solar cells  

作　　者：Ming-Wei An Zhou Xing Bao-Shan Wu Fang-Fang Xie Shan-Yu Zheng Lin-Long Deng Xu Wang Bin-Wen Chen Da-Qin Yun Su-Yuan Xie Rong-Bin Huang Lan-Sun Zheng 

机构地区：[1]State Key Laboratory for Physical Chemistry of Solid Surfaces,iChEM(Collaborative Innovation Center of Chemistry for Energy Materials),Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [2]Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361005,China [3]College of Energy,Xiamen University,Xiamen 361005,China

出　　处：《Rare Metals》2021年第7期1691-1697,共7页稀有金属（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21721001,51572231 and 51502252);the Natural Science Foundation of Fujian Province of China(No.2016J01264);。

摘　　要：In situ cross-linking encapsulation has been demonstrated to be an efficient strategy for enhancing the humidity stability of perovskite solar cells(PSCs).In this study,a novel cross-linkable fullerene derivative,namely1-(p-benzoate-(p-methylvinylbenzene)-indolino[2,3][60]fullerene(FPPS),was readily synthesized from commercially available building blocks in two steps.This FPPS was employed as an interfacial modifier on perovskite surfaces in inverted planar p-i-n PSCs.Owing to the fast interfacial charge extraction and efficient trap passivation,PSCs based on the cross-linked FPPS(C-FPPS)exhibited excellent performance.The PSCs had a top-performing power conversion efficiency(PCE)of 17.82%with negligible hysteresis,compared to the control devices without C-PFFS(16.99%).Moreover,the strong water resistance of the C-FPPS interfacial layer distinctly enhances the ambient stability of PSC devices,exhibiting a t80(the time required to reach 80%of the initial PCE)of 300 h under high-humidity conditions.This significantly surpasses the control devices,whose t80 was only 130 h.These results demonstrate that cross-linkable fullerene derivatives can be promising interfacial materials for designing high-efficiency,hysteresis-free,air-stable PSCs.

关 键 词：Perovskite solar cells Cross-linkable fullerene Fullerene interlayer Power conversion efficiency Humidity stability 

分 类 号：TQ317[化学工程—高聚物工业] TM914.4[电气工程—电力电子与电力传动]