One-stone-for-two-birds strategy to attain beyond 25% perovskite solar cells

Tinghuan Yang, Lili Gao, Jing Lu, Chuang Ma, Yachao Du, Peijun Wang, Zicheng Ding, Shiqiang Wang, Peng Xu, Dongle Liu, Haojin Li, Xiaoming Chang, Junjie Fang, Wenming Tian (), Yingguo Yang, Shengzhong (Frank) Liu () and Kui Zhao ()
Additional contact information
Tinghuan Yang: Shaanxi Normal University
Lili Gao: Shaanxi Normal University
Jing Lu: Shaanxi Normal University
Chuang Ma: Shaanxi Normal University
Yachao Du: Shaanxi Normal University
Peijun Wang: Chinese Academy of Sciences
Zicheng Ding: Shaanxi Normal University
Shiqiang Wang: Shaanxi Normal University
Peng Xu: Chinese Academy of Sciences
Dongle Liu: Shaanxi Normal University
Haojin Li: Shaanxi Normal University
Xiaoming Chang: Shaanxi Normal University
Junjie Fang: Shaanxi Normal University
Wenming Tian: Chinese Academy of Sciences
Yingguo Yang: Chinese Academy of Sciences
Shengzhong (Frank) Liu: Shaanxi Normal University
Kui Zhao: Shaanxi Normal University

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Even though the perovskite solar cell has been so popular for its skyrocketing power conversion efficiency, its further development is still roadblocked by its overall performance, in particular long-term stability, large-area fabrication and stable module efficiency. In essence, the soft component and ionic–electronic nature of metal halide perovskites usually chaperonage large number of anion vacancy defects that act as recombination centers to decrease both the photovoltaic efficiency and operational stability. Herein, we report a one-stone-for-two-birds strategy in which both anion-fixation and associated undercoordinated-Pb passivation are in situ achieved during crystallization by using a single amidino-based ligand, namely 3-amidinopyridine, for metal-halide perovskite to overcome above challenges. The resultant devices attain a power conversion efficiency as high as 25.3% (certified at 24.8%) with substantially improved stability. Moreover, the device without encapsulation retained 92% of its initial efficiency after 5000 h exposure in ambient and the device with encapsulation retained 95% of its initial efficiency after >500 h working at the maximum power point under continuous light irradiation in ambient. It is expected this one-stone-for-two-birds strategy will benefit large-area fabrication that desires for simplicity.

Date: 2023
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DOI: 10.1038/s41467-023-36229-1

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