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A Practical Approach Towards Highly Reproducible And High-Quality Perovskite Films Based on An Aging Treatment.

Accepted version
Peer-reviewed

Type

Article

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Authors

Zou, Yuqin 
Bai, Xinyu 
Kahmann, Simon 
Dai, Linjie 
Yuan, Shuai 

Abstract

Solution processing of hybrid perovskite semiconductors is a highly promising approach for the fabrication of cost-effective electronic and optoelectronic devices. However, challenges with this approach lie in overcoming the controllability of the perovskite film morphology and the reproducibility of device efficiencies. Here, a facile and practical aging treatment (AT) strategy is reported to modulate the perovskite crystal growth to produce sufficiently high-quality perovskite thin films with improved homogeneity and full-coverage morphology. The resulting AT-films exhibit fewer defects, faster charge carrier transfer/extraction, and suppressed non-radiative recombination compared with reference. The AT-devices achieve a noticeable improvement in the reproducibility, operational stability, and photovoltaic performance of devices, with the average efficiency increased by 16%. It also demonstrates the feasibility and scalability of AT strategy in optimizing the film morphology and device performance for other perovskite components including MAPbI3 , (MAPbBr3 )15 (FAPbI3 )85 , and Cs0.05 (MAPbBr3 )0.17 (FAPbI3 )0.83 . This method opens an effective avenue to improve the quality of perovskite films and photovoltaic devices in a scalable and reproducible manner. This article is protected by copyright. All rights reserved.

Description

Keywords

aging treatment, charge carrier kinetics, film morphology, perovskite films, perovskite solar cells

Journal Title

Adv Mater

Conference Name

Journal ISSN

0935-9648
1521-4095

Volume Title

Publisher

Wiley
Sponsorship
Royal Society (UF150033)
European Research Council (756962)
European Commission Horizon 2020 (H2020) ERC (957513)