From Structural Design to Functional Construction: Amine Molecules in High‐Performance Formamidinium‐Based Perovskite Solar Cells

• Published in: Angewandte Chemie International Edition Vol. 61; no. 19; pp. e202117067 - n/a
• Main Authors: Fu, Chunpeng, Gu, Zhenkun, Tang, Yan, Xiao, Qian, Zhang, Shasha, Zhang, Yiqiang, Song, Yanlin
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 02.05.2022
• Edition: International ed. in English
• Subjects: Additives; Amines; Charge transfer; Crystal defects; Crystal structure; Crystals; Formamidinium; Functional Construction; Moisture effects; Moisture resistance; Perovskite Solar Cells; Perovskites; Photovoltaic cells; Solar cells; Structural Design; Structural engineering; Structure-function relationships; Thermal stability; Formamidinium; Functional Construction; Amines; Structural Design; Perovskite Solar Cells
• ISSN: 1433-7851; 1521-3773; 1521-3773
• DOI: 10.1002/anie.202117067

Formamidinium (FA) based perovskites are considered as one of the most promising light‐absorbing perovskite materials owing to their narrower band gap and better thermal stability compared to conventional methylammonium‐based perovskites. Constant improvement by using various additives stimulates the potential application of these perovskites. Amine molecules with different structures have been widely used as typical additives in FA‐based perovskite solar cells, and decent performances have been achieved. Thus, a systematic review focusing on structural regulation and functional construction of amines in FA‐based perovskites is of significance. Herein, we analyze the construction mechanism of different structural amines on the functional perovskite crystals. The influence of amine molecules on specific perovskite properties including defect conditions, charge transfer, and moisture resistance are evaluated. Finally, we summarize the design rules of amine molecules for the application in high‐performance FA‐based perovskites and propose directions for the future development of additive molecules. The structural design of amine molecules is effective for functional construction of perovskite light‐absorbing layer in perovskite solar cells. High‐efficiency and robust perovskite solar cells can be achieved through crystal regulation of formamidinium‐based perovskites and improvement of the specific perovskite properties including defect condition, charge transfer, and moisture resistance.