Issue 15, 2022

Residual strain reduction leads to efficiency and operational stability improvements in flexible perovskite solar cells

Abstract

Flexible perovskite solar cells (F-PSCs) hold promise for portable power sources for applications in various fields, such as wearable and portable electronics and lightweight power supply in stratosphere and space applications. To date, it is still a challenge to achieve efficient and stable F-PSCs. Herein, a pre-applied strain on a flexible substrate to release the residual strain of the perovskite layers of the F-PSCs is reported. As a result, the F-PSC based on this strategy yielded a power conversion efficiency (PCE) of up to 18.71%, approaching that of its counterpart based on a glass substrate (20.32%). And it retained 90% of its initial PCE after 300 h under AM 1.5G light illumination with an extrapolated T80 lifetime (the time over which the device efficiency reduces to 80% of its initial value) exceeding 700 h. Furthermore, the PCE remained above 80% of its initial value even after 1500 tension-only bending cycles. The result of this work paves a possible way toward fabricating efficient and stable F-PSCs.

Graphical abstract: Residual strain reduction leads to efficiency and operational stability improvements in flexible perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr. 2022
Accepted
22 Jūn. 2022
First published
24 Jūn. 2022
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 6316-6323

Residual strain reduction leads to efficiency and operational stability improvements in flexible perovskite solar cells

S. He, S. Li, A. Zhang, G. Xie, X. Wang, J. Fang, Y. Qi and L. Qiu, Mater. Adv., 2022, 3, 6316 DOI: 10.1039/D2MA00431C

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