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Crystallization Regulation by Self‐Assembling Liquid Crystal Template Enables Efficient and Stable Perovskite Solar Cells.

Authors :
Wu, Meizi
Wang, Hongyan
Li, Yong
Chen, Ran
Zhou, Hui
Yang, Shaomin
Xu, Dongfang
Li, Kun
An, Zhongwei
Liu, Shengzhong
Liu, Zhike
Source :
Angewandte Chemie International Edition. 12/21/2023, Vol. 62 Issue 52, p1-10. 10p.
Publication Year :
2023

Abstract

It is found that the disordered growth of bottom perovskite film deteriorates the buried interface of perovskite solar cells (PSCs), so developing a new material to modify the buried interface for regulating the crystal growth and defect passivation is an effective approach for improving the photovoltaic performance of PSCs. Here, we developed a new ionic liquid crystal (ILC, 1‐Dodecyl‐3‐methylimidazolium tetrafluoroborate) as both crystal regulator and defect passivator to modify the buried interface of PSCs. The high lattice matching between this ILC and perovskite promotes preferential growth of perovskite film along [001] direction, while the oriented ILC with mesomorphic phase has a strong chemical interaction with perovskite to passivate the interface defect, as a result, the modified buried interface exhibits suppressed defects, improved band alignment, reduced nonradiative recombination losses, and enhanced charge extraction. The ILC‐modified PSC delivers a power conversion efficiency of 24.92 % and maintains 94 % of the original value after storage in ambient for 3000 h. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14337851
Volume :
62
Issue :
52
Database :
Academic Search Index
Journal :
Angewandte Chemie International Edition
Publication Type :
Academic Journal
Accession number :
174271316
Full Text :
https://doi.org/10.1002/anie.202313472