Volume 136, Issue 1 e202315233
Forschungsartikel

Synchronous Elimination of Excess Photoinstable PbI2 and Interfacial Band Mismatch for Efficient and Stable Perovskite Solar Cells

Jiacheng He

Jiacheng He

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

These authors contributed equally to this work.

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

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Wangping Sheng

Wangping Sheng

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

These authors contributed equally to this work.

Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), ​Investigation (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Jia Yang

Jia Yang

National Engineering Research Center for Carbohydrate Synthesis/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), ​Investigation (supporting), Software (supporting), Supervision (supporting), Visualization (supporting), Writing - original draft (supporting), Writing - review & editing (supporting)

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Yang Zhong

Yang Zhong

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

Contribution: ​Investigation (supporting), Methodology (supporting), Project administration (supporting), Resources (supporting), Software (supporting)

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Qianqian Cai

Qianqian Cai

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

Contribution: Data curation (supporting), Formal analysis (supporting), Project administration (supporting), Validation (supporting), Writing - original draft (supporting)

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Yikun Liu

Yikun Liu

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

Contribution: Conceptualization (supporting), Formal analysis (supporting), ​Investigation (supporting), Validation (supporting)

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Zhao Guo

Zhao Guo

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

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

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Prof. Licheng Tan

Corresponding Author

Prof. Licheng Tan

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

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

Contribution: Conceptualization (supporting), Data curation (supporting), Formal analysis (supporting), Funding acquisition (lead), ​Investigation (supporting), Project administration (lead), Resources (lead), Supervision (lead), Writing - original draft (lead), Writing - review & editing (lead)

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Prof. Yiwang Chen

Corresponding Author

Prof. Yiwang Chen

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031 China

National Engineering Research Center for Carbohydrate Synthesis/Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022 China

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

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

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First published: 22 November 2023
Citations: 7

Abstract

Eliminating the undesired photoinstability of excess lead iodide (PbI2) in the perovskite film and reducing the energy mismatch between the perovskite layer and heterogeneous interfaces are urgent issues to be addressed in the preparation of perovskite solar cells (PVSCs) by two-step sequential deposition method. Here, the 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) is employed to convert superfluous PbI2 to more robust 1D EMIMPbI3 which can withstand lattice strain, while forming an interfacial dipole layer at the SnO2/perovskite interface to reconfigure the interfacial energy band structure and accelerate the charge extraction. Consequently, the unencapsulated PVSCs device attains a champion efficiency of 24.28 % with one of the highest open-circuit voltage (1.19 V). Moreover, the unencapsulated devices showcase significantly improved thermal stability, enhanced environmental stability and remarkable operational stability accompanied by 85 % of primitive efficiency retained over 1500 h at maximum power point tracking under continuous illumination.

Conflict of interest

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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