Crystallinity and Phase Control in Formamidinium-Based Dion-Jacobson 2D Perovskite via Seed-Induced Growth for Efficient Photovoltaics

Crystallinity and Phase Control in Formamidinium-Based Dion-Jacobson 2D Perovskite via Seed-Induced Growth for Efficient Photovoltaics

© 2023 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 36 vom: 26. Sept., Seite e2303061
1. Verfasser: Wu, Guangbao (VerfasserIn)
Weitere Verfasser: Liu, Tanghao, Hu, Mengxiao, Zhang, Zhipeng, Li, Shilin, Xiao, Linge, Guo, Jia, Wang, Yueyang, Zhu, Annan, Li, Wang, Zhou, Huiqiong, Zhang, Yuan, Chen, Runfeng, Xing, Guichuan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article Dion-Jacobson phase FA-based 2D perovskites efficiency of 20% seed-induced growth solar cells
Beschreibung
Zusammenfassung:© 2023 Wiley-VCH GmbH.
2D perovskites based on Formamidinium (FA) hold the potential for excellent stability and a broad absorption range, making them attractive materials for solar cells. However, FA-based 2D perovskites produced via one-step processing exhibit poor crystallinity and random quasi-quantum wells (QWs), leading to subpar photovoltaic performance. In this study, a seed-induced growth approach is introduced employing MAPbCl3 and BDAPbI4 in the deposition of FA-based Dion-Jacobson 2D perovskite films. This method yields high-quality perovskite films as the seeds preferentially precipitate and serve as templates for the epitaxial growth of FA-based counterparts, effectively suppressing the δ phase. Moreover, the epitaxial growth facilitated by uniformly dispersed seeds results in simultaneous crystallization from top to bottom, efficiently mitigating random phases (n = 2, 3, 4…) induced by the diffusion of organic cations and, in turn, minimizing energy loss. The impact of seed-induced growth on the crystallization and phase distribution of FA-based 2D perovskites is systematically investigated. As a result, the optimized FA-based 2D perovskite solar cell delivers an outstanding efficiency of 20.0%, accompanied by a remarkable fill factor of 0.823. Additionally, the unencapsulated device demonstrates exceptional stability, maintaining 98% of its initial efficiency after 1344 h of storage
Beschreibung:Date Revised 07.09.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202303061