Nature communications · 2026
Mitigating tin ion migration and reinforcing buried interface via synergistic polymer-modified tin oxide.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
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Yang Wenxin, Zhao Yepin, Suo Zhen-Yang, Lin Yu-Che, Wang Minhuan, Huang Weixuan, Zheng Jian-Guo, Lee Joo-Hong, Xu Mingjie, Tong Yiushun, Shen Zhichao, Meng Dong, Zheng Ran, Gong Ming, Zhu Yingke, Zhang Ying, Duan Haoxiang, Zhang Elizabeth, Shi Yuran, Lin Chia-Yu, Dhillon Aman, Kim Jinsung, Yang Tso-An, Frenkel Anatoly I, Pan Xiaoqing, Yavuz Ilhan, Cao Jing, Lee Jin-Wook, Yang Yang
Аннотация
The buried interface between the charge transport layer and the overlying perovskite absorber is critical yet difficult to probe in perovskite solar cells. Because light enters through the transparent substrate and is predominantly absorbed near this region, photo-induced degradation processes are partially initiated at the hidden buried interface. Here, we reveal that instability at the buried SnO2/perovskite interface triggers structural and chemical decomposition of the perovskite layer. To address this issue, we introduce polymeric interlayers that simultaneously reinforce interfacial bonding and suppress tin-ion migration. Poly(1-ethenylpyrrolidine-2,5-dione) (PED) forms a robust and chemically compatible interface, yielding enhanced phase purity, reduced defect density, and significantly mitigated tin diffusion. These findings identify the buried SnO2/perovskite interface as a key degradation-sensitive region under light aging and highlight interfacial polymer design as an effective strategy for improving the intrinsic stability of perovskite photovoltaics.