Device deficiency and degradation diagnosis model of Perovskite solar cells through hysteresis analysis

Zi Shuai Wang, Yidan An, Xingang Ren, Hong Zhang, Zhanfeng Huang, Hin-Lap Yip, Zhixiang Huang and Wallace C. H. Choy ()
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Zi Shuai Wang: The University of Hong Kong
Yidan An: City University of Hong Kong
Xingang Ren: Anhui University
Hong Zhang: Fudan University
Zhanfeng Huang: The University of Hong Kong
Hin-Lap Yip: City University of Hong Kong
Zhixiang Huang: Anhui University
Wallace C. H. Choy: The University of Hong Kong

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract While operational stability has evolved to be the primary issue for the practical applications of perovskite solar cells (PSCs), the understanding of the origins of device degradation is still limited. Hysteresis is known as a unique and significant feature of PSCs. The hysteresis behavior of the current density-voltage (J–V) curves, governed by the interaction between the evolving ion-induced electric field and the carrier transport/recombination, offers rich and important information about the physical properties of the device. Herein, we propose to establish hysteresis as a diagnostic key to unveil and remedy degradation issues with device physics. With a custom-made ion-incorporated drift-diffusion simulator, we comprehensively investigate the relations between characteristic J–V hysteresis features and critical device issues such as bulk and surface defects, and low mobility of each layer in the PSCs. Ultimately, we derive a fundamental understanding and unveil the origins of the device degradation during the continuous operation of PSCs. This work therefore offers a new way to address and optimize PSC operational stability.

Date: 2024
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DOI: 10.1038/s41467-024-53162-z

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