Volume 63, Issue 14 e202319100
Research Article

Amine-releasable Mediator In situ Repair Perovskites for Efficient and Stable Perovskite Solar Cells

Ruonan Zhao

Ruonan Zhao

Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang⋅, 330022 China

Contribution: Data curation (lead), Formal analysis (lead), Funding acquisition (supporting), ​Investigation (lead), Methodology (equal), Visualization (lead), Writing - original draft (lead)

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Prof. Licheng Tan

Prof. Licheng Tan

Institute of Polymers and Energy Chemistry (IPEC)/ Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

Peking University Yangtze Delta Institute of Optoelectronics, 60 Chongzhou Avenue, Nantong, 226010 China

Contribution: Conceptualization (supporting), Formal analysis (equal), Funding acquisition (equal), Methodology (supporting), Project administration (lead), Resources (equal), Supervision (lead), Validation (equal), Visualization (supporting), Writing - review & editing (equal)

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Xiao Luo

Xiao Luo

Institute of Polymers and Energy Chemistry (IPEC)/ Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

Contribution: Data curation (equal), ​Investigation (equal), Methodology (supporting)

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Jiacheng He

Jiacheng He

Institute of Polymers and Energy Chemistry (IPEC)/ Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

Contribution: Data curation (supporting), Formal analysis (equal), ​Investigation (equal), Methodology (supporting), Writing - original draft (supporting)

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Runying Dai

Runying Dai

Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang⋅, 330022 China

Contribution: Formal analysis (supporting), Funding acquisition (supporting), Methodology (supporting), Resources (supporting), Software (supporting)

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Chuizheng Feng

Chuizheng Feng

Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang⋅, 330022 China

Contribution: ​Investigation (supporting), Methodology (supporting), Visualization (supporting)

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Qingguo Zhang

Qingguo Zhang

Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang⋅, 330022 China

Contribution: ​Investigation (supporting), Methodology (supporting)

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Jia Yang

Corresponding Author

Jia Yang

Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang⋅, 330022 China

Contribution: Conceptualization (lead), Data curation (supporting), Formal analysis (equal), ​Investigation (equal), Methodology (lead), Project administration (supporting), Supervision (lead), Validation (equal), Visualization (equal), Writing - original draft (equal), Writing - review & editing (lead)

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Prof. Yiwang Chen

Corresponding Author

Prof. Yiwang Chen

Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang⋅, 330022 China

Institute of Polymers and Energy Chemistry (IPEC)/ Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

Peking University Yangtze Delta Institute of Optoelectronics, 60 Chongzhou Avenue, Nantong, 226010 China

Contribution: Data curation (supporting), Formal analysis (supporting), Funding acquisition (lead), Methodology (equal), Project administration (lead), Resources (equal), Supervision (lead), Validation (equal), Visualization (supporting), Writing - original draft (supporting), Writing - review & editing (supporting)

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First published: 09 February 2024
Citations: 14

Graphical Abstract

Amine-releasable mediator methylammonium pyridine-2-carboxylic (MAPyA) is demonstrated to in situ repair the imperfections in perovskite film. The specific mechanism is that MAPyA-released methylamine gifts a crystal reconstruction environment by inducing liquid intermediate phase, thus reconvert the microcrystals and residual PbI2 to perfect perovskites in situ. The optimized device exhibits efficiency of 24.06 % and excellent photostability.

Abstract

Residual lead iodide (PbI2) is deemed to a double-edged sword in perovskite film as small amounts of PbI2 are beneficial to the photovoltaic performance, but excessive will cause degradation of photovoltaic performance and stability. Herein, an in situ repair strategy has been developed by introducing amine-releasable mediator (methylammonium pyridine-2-carboxylic, MAPyA) to eliminate over-residual PbI2 and regulate the crystal quality of perovskite film. Notably, MAPyA can be partially decomposed into methylamine (MA) gas and pyridine-2-carboxylic (PyA) during high temperature annealing. The released MA can locally form liquid intermediate phase, facilitating the reconstruction of perovskite microcrystals and residual PbI2. Moreover, the leftover PyA is confirmed to effectively passivate the uncoordinated lead ions in final perovskite film. Based upon this, superior perovskite film with optimized crystal structure and holistic negligible PbI2 is acquired. The assembled device realizes outstanding efficiency of 24.06 %, and exhibits a remarkable operational stability that maintaining 87 % of its origin efficiency after continuous illumination for 1480 h. And the unencapsulated MAPyA-treated devices present significant uplift in humidity stability (maintaining ~93 % of the initial efficiency over 1500 h, 50–60 % relative humidity). Furthermore, the further optimization of this strategy with nanoimprint technology proves its superiority in the amplificative preparation for perovskite films.

Conflict of interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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