Stabilizing dual-phased perovskite towards high performance photovoltaics with enhanced batch stability and consistency

Guihua Zhang, Deng Wang, Bowei Li, Qing Lian (), Xinyi Zou, Dongyang Li, Qiming Yin, Guojun Mi, Jie Li, Kui Feng, Abbas Amini, Alex. K. -Y. Jen, Xugang Guo, Baomin Xu () and Chun Cheng ()
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Guihua Zhang: Southern University of Science and Technology
Deng Wang: Southern University of Science and Technology
Bowei Li: Shanghai Jiao Tong University
Qing Lian: Southern University of Science and Technology
Xinyi Zou: Southern University of Science and Technology
Dongyang Li: Southern University of Science and Technology
Qiming Yin: Southern University of Science and Technology
Guojun Mi: Southern University of Science and Technology
Jie Li: Southern University of Science and Technology
Kui Feng: Southern University of Science and Technology
Abbas Amini: Western Sydney University
Alex. K. -Y. Jen: City University of Hong Kong
Xugang Guo: Southern University of Science and Technology
Baomin Xu: Southern University of Science and Technology
Chun Cheng: Southern University of Science and Technology

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Fabricating high-performance perovskite solar cells (PSCs) with solution processing is conducive to low-cost commercial production, it is therefore rather critical to stabilize perovskite in both solution and solid phases. For this purpose, the speed-up ageing of perovskite solution in air was systematically studied and its severe spontaneous degradation was observed. To address this issue, we introduce 4-(trifluoromethyl) phenylhydrazine (TFPH) to modify the perovskite solution, which presents enhanced storage stability. Consequently, when the modified solution was used to prepare PSCs, we obtained much improved and well consistent power conversion efficiencies (PCEs, ~ 26.0%) regardless of the perovskite solution ageing time, as well as exciting operational stability, which maintains PCE ≥ 92% for 1830 hours. These results are attributed to TFPH’s multifunctionality: a) hydrazine groups inhibit perovskite decomposition by dual-pathway mechanism; b) trifluoromethyl boosts dipole moment, aiding crystallization and strain relaxation; c) impurity reduction and high-quality film jointly lower charge traps. This work substantially assists understanding and modifying perovskite degradation in both solution and solid phases. The developed performance stability and consistency on the TFPH modified device batches is of great significance for commercial production of PSCs.

Date: 2025
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DOI: 10.1038/s41467-025-63776-6

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