Mechanically and operationally stable flexible inverted perovskite solar cells with 20.32% efficiency by a simple oligomer cross-linking method

Nairong Jiang; Bangyu Xing; Yifan Wang; Hanwen Zhang; Da Yin; Yuefeng Liu; Yangang Bi; Lijun Zhang; Jing Feng; Hongbo Sun

doi:10.1016/j.scib.2022.02.010

Mechanically and operationally stable flexible inverted perovskite solar cells with 20.32% efficiency by a simple oligomer cross-linking method

Sci Bull (Beijing). 2022 Apr 30;67(8):794-802. doi: 10.1016/j.scib.2022.02.010. Epub 2022 Feb 22.

Authors

Nairong Jiang¹, Bangyu Xing², Yifan Wang¹, Hanwen Zhang¹, Da Yin¹, Yuefeng Liu¹, Yangang Bi¹, Lijun Zhang³, Jing Feng⁴, Hongbo Sun⁵

Affiliations

¹ State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
² State Key Laboratory of Integrated Optoelectronics, College of Materials Science and Engineering, Jilin University, Changchun 130012, China.
³ State Key Laboratory of Integrated Optoelectronics, College of Materials Science and Engineering, Jilin University, Changchun 130012, China. Electronic address: lijun_zhang@jlu.edu.cn.
⁴ State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China. Electronic address: jingfeng@jlu.edu.cn.
⁵ State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China. Electronic address: hbsun@tsinghua.edu.cn.

PMID: 36546232
DOI: 10.1016/j.scib.2022.02.010

Abstract

Due to their great potential in wearable and portable electronics, flexible perovskite solar cells (FPSCs) have been extensively studied. The major challenges in the practical applications of FPSCs are efficiency, operational stability, and mechanical stability. Herein, we developed a facile approach by incorporating a cross-linking oligomer of trimethylolpropane ethoxylate triacrylate (TET) into perovskite films to simultaneously enhance the power conversion efficiency (PCE) and stability of FPSCs. A PCE of 20.32% was achieved, which are among the best results for the inverted FPSCs. Both mechanical and environmental stabilities were improved for the TET-incorporated FPSCs. In particular, the PCE retained approximately 87% of its initial value after 20,000 bending cycles at a radius of 4 mm. The inverted FPSCs retained 85% of the initial PCE after 500 h storage at 85 °C and 90% after 900 h continuous one-sun illumination. A joint experiment-theory analysis ascribed the underlying mechanism to the reduced defect densities, improved crystallinity, and stability of the perovskite absorbers on flexible substrates caused by TET incorporation.

Keywords: Flexible perovskite solar cells; Oligomer cross-linking; Power conversion efficiency; Trimethylolpropane ethoxylate triacrylate.

MeSH terms

Acrylates*
Calcium Compounds*
Electronics

Substances

perovskite
trimethylolpropane triacrylate
Acrylates
Calcium Compounds