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

He，Sisi1; Li，Sibo2; Zhang，Anning1; Xie，Guanshui2; Wang，Xin2; Fang，Jun2; Qi，Yabing3; Qiu，Longbin2

2022-06-01

10.1039/d2ma00431c

MATERIALS ADVANCES   Impact Factor & Quartile

2633-5409

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 T-80 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.

ESCI

English

Corresponding

National Natural Science Foundation of China (NSFC)[52103300] ; Shenzhen Science and Technology Program["JCYJ20210324132806017","KQTD20200820113045083"] ; NSFC[22109067] ; Guangdong Provincial Science and Technology Program[2022A1515010085]

Materials Science

Materials Science, Multidisciplinary

WOS:000827456100001

ROYAL SOC CHEMISTRY

2-s2.0-85133768886

Web of Science

1.Flexible Printed Electronics Technology Center,School of Science,Harbin Institute of Technology Shenzhen,Shenzhen,Nanshan District, Guangdong Province,518055,China
2.SUSTech Energy Institute for Carbon Neutrality,Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Energy Materials and Surface Sciences Unit (EMSSU),Okinawa Institute of Science and Technology Graduate University (OIST),Onna-son,1919-1 Tancha, Okinawa,904-0495,Japan

He，Sisi,Li，Sibo,Zhang，Anning,et al. Residual strain reduction leads to efficiency and operational stability improvements in flexible perovskite solar cells[J]. MATERIALS ADVANCES,2022.

He，Sisi.,Li，Sibo.,Zhang，Anning.,Xie，Guanshui.,Wang，Xin.,...&Qiu，Longbin.(2022).Residual strain reduction leads to efficiency and operational stability improvements in flexible perovskite solar cells.MATERIALS ADVANCES.

He，Sisi,et al."Residual strain reduction leads to efficiency and operational stability improvements in flexible perovskite solar cells".MATERIALS ADVANCES (2022).