Perovskite solar cells with self-disintegrating seeds deliver an 83.64 % fill factor

Large-seed-induced regulation significantly impacts perovskite film grain growth; however, it inadequately addresses stress and defect issues at the perovskite interface. To counter this, we introduce an innovative self-disintegrating seed approach, employing 2D (4-FBZA)2PbI4 perovskite to enhance t...

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Bibliographic Details
Published in:Nano energy 2024-08, Vol.127, p.109751, Article 109751
Main Authors: Liu, Qianyu, Ou, Zeping, Ma, Zhu, Huang, Zhangfeng, Li, Yanlin, Hou, Shanyue, Ren, Jie, Peng, Jin, Bai, Lihong, Yu, Hong, Lv, Zhuo, Xiang, Yan, Yu, Jian, Zhang, Wenfeng, Jiang, Fangdan, Sun, Kuan, Zhu, Tong, Ding, Liming
Format: Article
Language:English
Subjects:
Fill factor
Interface modification
Perovskite solar cells
Self-disintegrating seed
Stress releasement
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Summary:Large-seed-induced regulation significantly impacts perovskite film grain growth; however, it inadequately addresses stress and defect issues at the perovskite interface. To counter this, we introduce an innovative self-disintegrating seed approach, employing 2D (4-FBZA)2PbI4 perovskite to enhance the crystallization process. During perovskite crystal growth, (4-FBZA)2PbI4 could disintegrate and release 4-FBZA+ ions. These ions effectively anchor the perovskite interface and interact with FA+ and [PbI6]4- within the lattice, passivating defects and releasing detrimental stress. This strategy results in reduced nonradiative recombination and residual stress, culminating in perovskite solar cells (PSCs) achieving a champion power conversion efficiency (PCE) of 23.73 % and a remarkable fill factor of 83.64 %. Crucially, unencapsulated PSCs retain over 90 % of their initial PCE following 2000 h of exposure in ambient conditions at 25±5 °C and 60 % relative humidity. [Display omitted] •A self-disintegrating seed strategy is proposed to improve the quality of perovskite films.•The interface modification and stress releasement brought by self-disintegrating seed are systematically demonstrated.•Perovskite solar cells with enhanced performance and stability are achieved.
ISSN:2211-2855
DOI:10.1016/j.nanoen.2024.109751