Unveiling the additive-assisted oriented growth of perovskite crystallite for high performance light-emitting diodes.
Zobrazit/ otevřít
Autor
Zhu, Lin
Cao, Hui
Zhang, Hao
Wang, Jie
Wen, Kaichuan
Fu, Zewu
Jiang, Tao
Xu, Lei
Zhang, Ya
Tu, Cailing
Zhang, Ju
Liu, Dawei
Zhang, Guangbin
Kong, Decheng
Fan, Ning
Yi, Chang
Chang, Jin
Datum
2021-08-23Journal Title
Nat Commun
ISSN
2041-1723
Publisher
Springer Science and Business Media LLC
Volume
12
Issue
1
Pages
5081
Language
eng
Type
Article
This Version
VoR
Physical Medium
Electronic
Metadata
Zobrazit celý záznamCitation
Zhu, L., Cao, H., Xue, C., Zhang, H., Qin, M., Wang, J., Wen, K., et al. (2021). Unveiling the additive-assisted oriented growth of perovskite crystallite for high performance light-emitting diodes.. Nat Commun, 12 (1), 5081. https://doi.org/10.1038/s41467-021-25407-8
Abstrakt
Solution-processed metal halide perovskites have been recognized as one of the most promising semiconductors, with applications in light-emitting diodes (LEDs), solar cells and lasers. Various additives have been widely used in perovskite precursor solutions, aiming to improve the formed perovskite film quality through passivating defects and controlling the crystallinity. The additive's role of defect passivation has been intensively investigated, while a deep understanding of how additives influence the crystallization process of perovskites is lacking. Here, we reveal a general additive-assisted crystal formation pathway for FAPbI3 perovskite with vertical orientation, by tracking the chemical interaction in the precursor solution and crystallographic evolution during the film formation process. The resulting understanding motivates us to use a new additive with multi-functional groups, 2-(2-(2-Aminoethoxy)ethoxy)acetic acid, which can facilitate the orientated growth of perovskite and passivate defects, leading to perovskite layer with high crystallinity and low defect density and thereby record-high performance NIR perovskite LEDs (~800 nm emission peak, a peak external quantum efficiency of 22.2% with enhanced stability).
Identifiers
External DOI: https://doi.org/10.1038/s41467-021-25407-8
This record's URL: https://www.repository.cam.ac.uk/handle/1810/329921
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