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Issue 10, 2019
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Ultra-flexible perovskite solar cells with crumpling durability: toward a wearable power source

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Abstract

Perovskite materials hold great potential as photovoltaic power sources for portable devices owing to their mechanical flexibility and high performance; however, the flexibility and efficiency require further improvement to attain practical viability. We investigated the mechanical fracture behavior of polycrystalline perovskite films by varying the substrate thickness and applying the neutral plane concept. This enabled us to fabricate a crack-free perovskite film on an ultra-thin substrate (∼2.5 μm) and to demonstrate ultra-flexible solar cells with high efficiency (17.03%) with unprecedented flexibility sustained after 10 000 cycles of bending at a 0.5 mm radius. This represents a high efficiency of 13.6% for large-area flexible perovskite solar cells (1.2 cm2), fabricated by using a hybrid transparent electrode composed of a metal mesh grid and conducting polymer. Using a protective layer to achieve the neutral plane concept, our ultra-flexible perovskite solar cells are demonstrated to be durable even after 100 crumpling cycles. Our approach paves the way to fabricate flexible perovskite solar cells for portable power sources.

Graphical abstract: Ultra-flexible perovskite solar cells with crumpling durability: toward a wearable power source

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Supplementary files

Article information


Submitted
18 Jun 2019
Accepted
20 Sep 2019
First published
20 Sep 2019

Energy Environ. Sci., 2019,12, 3182-3191
Article type
Paper

Ultra-flexible perovskite solar cells with crumpling durability: toward a wearable power source

G. Lee, M. Kim, Y. W. Choi, N. Ahn, J. Jang, J. Yoon, S. M. Kim, J. Lee, D. Kang, H. S. Jung and M. Choi, Energy Environ. Sci., 2019, 12, 3182
DOI: 10.1039/C9EE01944H

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