Volume 136, Issue 48 e202412042
Forschungsartikel

Molecular Design of Hole Transport Materials to Immobilize Ion Motion for Photostable Perovskite Solar Cells

Zheng Zhang

Zheng Zhang

School of Environment and Energy, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510000 China

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Chenghao Duan

Chenghao Duan

School of Environment and Energy, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510000 China

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Sijing Wang

Sijing Wang

School of Environment and Energy, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510000 China

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Tianyou Xie

Tianyou Xie

Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan, 030024 China

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Feilin Zou

Feilin Zou

School of Environment and Energy, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510000 China

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Yang Luo

Yang Luo

Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan, 030024 China

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Ruijia Tang

Ruijia Tang

College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Prof. Kunpeng Guo

Corresponding Author

Prof. Kunpeng Guo

Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan, 030024 China

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Ligang Yuan

Ligang Yuan

School of Environment and Energy, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510000 China

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Kaicheng Zhang

Kaicheng Zhang

Institute of Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-University Erlangen-Nuremberg, Martensstraße 7, Erlangen, 91058 Germany

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Yao Wang

Corresponding Author

Yao Wang

Center of Future Photovoltaics Research, Global Institute of Future Technology (GIFT), Shanghai Jiao Tong University, Shanghai, 200240 China

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Prof. Jianhang Qiu

Corresponding Author

Prof. Jianhang Qiu

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 China

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Prof. Keyou Yan

Corresponding Author

Prof. Keyou Yan

School of Environment and Energy, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510000 China

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First published: 16 August 2024
Citations: 1

Abstract

Poor operational stability is a crucial factor limiting the further application of perovskite solar cells (PSCs). Organic semiconductor layers can be a powerful means for reinforcing interfaces and inhibiting ion migration. Herein, two hole-transporting molecules, pDPA-SFX and mDPA-SFX, are synthesized with tuned substituent connection sites. The meta-substituted mDPA-SFX results in a larger dipole moment, more ordered packing, and better charge mobility than pDPA-SFX, accompanying with strong interface bonding on perovskite surfaces and suppressed ion motion as well. Importantly, mDPA-SFX-based PSCs exhibit an efficiency that has significantly increased from 22.5 % to 24.8 % and a module-based efficiency of 19.26 % with an active area of 12.95 cm2. The corresponding cell retain 94.8 % of its initial efficiency at maximum power point tracking (MPPT) after 1,000 h (T95=1,000 h). The MPPT T80 lifetime is as long as 2,238 h. This work illustrates that a small degree of structural variation in organic compounds leaves considerable room for developing new HTMs for light stable PSCs.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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