Alcohol-dispersed polymer complex as an effective and durable interface modifier for n-i-p perovskite solar cells  

作　　者：Chang Shi Jiangling Li Shuping Xiao Ziyi Wang Wuchen Xiang Rui Wu Yang Liu Yinhua Zhou Weijun Ke Guojia Fang Pingli Qin 

机构地区：[1]Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology,Wuhan 430205,Hubei,China [2]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China [3]School of Physics and Technology,Key Laboratory of Artificial Micro-and Nano-structures of the Ministry of Education and School of Physics and Technology,Wuhan University,Wuhan 430072,Hubei,China

出　　处：《Journal of Energy Chemistry》2024年第6期243-252,I0007,共11页能源化学（英文版）

基　　金：supported by the Science Foundation(K201827);the Open Foundation of Hubei Key Laboratory of Optical Information and Pattern Recognition(202103,202206);the Graduate Education Innovation Fund of Wuhan Institute of Technology(CX2023279,CX2023277,CX2023272)。

摘　　要：Abundant interfacial defects remain a significant challenge that hampers both the efficiency and stability of perovskite solar cells(PSCs).Herein,an alcohol-dispersed conducting polymer complex,denoted as PEDOT:F(Poly(3,4-ethylene dioxythiophene):Perfluorinated sulfonic acid ionomers),is introduced into the interface between perovskite and hole transporting layer in regular-structured PSCs.PEDOT:F serves as a multi-functional interface layer(filling grain boundaries and covering perovskite's grain-surface)to achieve a robust interaction with organic groups within perovskites,which could induce a structural transformation of PEDOT to increase its conductivity for the efficient hole-transport.Furthermore,the strong interaction between PEDOT and perovskites could promote an effective coupling of undercoordinated Pb~(2+)ions with the lone electron pairs near O&S atoms in PEDOT molecules,thereby enhancing defect passivation.Additionally,PEDOT:F with inherent hydrophobic properties prevents effectively moisture invasion into perovskites for the improved long-term stability of the PSCs.Consequently,the PEDOT:F-based PSCs achieved a champion efficiency of 24.81%,and maintained ca.92%of their initial efficiency after 7680 h of storage in a dry air environment,accompanied by the enhanced photothermal stability.

关 键 词：Alcohol-dispersed conducting polymer complex Interface passivation Grain boundaries Device stability Perovskite solar cells 

分 类 号：TB332[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]