Tuning crystal orientation and charge transport of quasi-2D perovskites via halogen-substituted benzylammonium for efficient solar cells

Guiqiang Cheng, Jian Wang, Rong Yang, Cheng Li, Hao Zhang, Nana Wang, Renzhi Li, Jianpu Wang, Wei Huang

科研成果: 期刊稿件快报同行评审

14 引用 (Scopus)

摘要

Quasi-two-dimensional (quasi-2D) perovskites with high stability usually suffers from poor device efficiency. Chemical tuning of the spacer cations has been an effective strategy to achieve efficient and stable quasi-2D perovskite solar cells. Here, we demonstrate that 3-halogon-substituted benzylammonium iodide (3X-BAI, X = F, Cl, Br, I) can significantly affect the orientation of low-dimensional perovskites and charge transport from perovskite to hole extraction layer, as well as device performance. With 3Br-BAI, we achieve the highest device efficiency of 13.21% for quasi-2D perovskites with a nominal n = 3 average composition. Our work provides a facile approach to regulate vertical crystal orientation and charge transport via tuning the molecular structure of organic spacer toward high performance quasi-2D perovskite solar cells.

源语言英语
页(从-至)205-209
页数5
期刊Journal of Energy Chemistry
66
DOI
出版状态已出版 - 3月 2022

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