首页|Interfacial modification using the cross-linkable tannic acid for highly-efficient perovskite solar cells with excellent stability

Interfacial modification using the cross-linkable tannic acid for highly-efficient perovskite solar cells with excellent stability

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Although the performance of perovskite solar cells(PSCs)has been dramatically increased in recent years,stability is still the main obstacle preventing the PSCs from being commercial.PSC device instability can be caused by a variety of reasons,including ions diffusion,surface and grain boundary defects,etc.In this work,the cross-linkable tannic acid(TA)is introduced to modify perovskite film through post-treatment method.The numerous organic functional groups(-OH and C=O)in TA can interact with the uncoordi-nated Pb2+and I- ions in perovskite,thus passivating defects and inhibiting ions diffusion.In addition,the formed TA network can absorb a small amount of the residual moisture inside the device to protect the perovskite layer.Furthermore,TA modification regulates the energy level of perovskite,and reduces interfacial charge recombination.Ultimately,following TA treatment,the device efficiency is increased significantly from 21.31％to 23.11％,with a decreased hysteresis effect.Notably,the treated device shows excellent air,thermal,and operational stability.In light of this,the readily available,inexpensive TA has the potential to operate as a multipurpose interfacial modifier to increase device efficiency while also enhancing device stability.

Tannic acidDefect passivationlons diffusionHydrophilicStabilityPerovskite solar cells

Xing Gao、Lirong Rong、Fei Wu、Yen-Hung Lin、Ye Zeng、Junhong Tan、Rongxing He、Cheng Zhong、Linna Zhu

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Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy,School of Materials & Energy,Southwest University,Chongqing 400715,China

Department of Electronic and Computer Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon 999077,Hong Kong,China

State Key Laboratory of Advanced Displays and Optoelectronics Technologies,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon 999077,Hong Kong,China

Key Laboratory of Luminescence Analysis and Molecular Sensing,Ministry of Education,School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China

Hubei Key Lab on Organic and Polymeric Optoelectronic Materials,Department of Chemistry,Wuhan University,Wuhan 430072,Hubei,China

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General Program of Chongqing Natural Science FoundationGeneral Program of Chongqing Natural Science Foundation中央高校基本科研业务费专项

CSTB2022NSCQ-MSX1227CSTB2022NSCQ-MSX0459SWU-XDJH202314

2024

10.1016/j.jechem.2023.12.030

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)：2024.91(4)
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