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

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

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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 undercoordi-nated Pb2+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.

Alcohol-dispersed conducting polymer complexInterface passivationGrain boundariesDevice stabilityPerovskite solar cells

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

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Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology,Wuhan 430205,Hubei,China

Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China

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

Science FoundationOpen Foundation of Hubei Key Laboratory of Optical Information and Pattern RecognitionOpen Foundation of Hubei Key Laboratory of Optical Information and Pattern RecognitionGraduate Education Innovation Fund of Wuhan Institute of TechnologyGraduate Education Innovation Fund of Wuhan Institute of TechnologyGraduate Education Innovation Fund of Wuhan Institute of Technology

K201827202103202206CX2023279CX2023277CX2023272

2024

10.1016/j.jechem.2024.01.075

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
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