Jiang Nairong, Xing Bangyu, Wang Yifan, Zhang Hanwen, Yin Da, Liu Yuefeng, Bi Yangang, Zhang Lijun, Feng Jing, Sun Hongbo
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
State Key Laboratory of Integrated Optoelectronics, College of Materials Science and Engineering, Jilin University, Changchun 130012, China.
Sci Bull (Beijing). 2022 Apr 30;67(8):794-802. doi: 10.1016/j.scib.2022.02.010. Epub 2022 Feb 22.
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.
由于其在可穿戴和便携式电子产品中的巨大潜力，柔性钙钛矿太阳能电池（FPSC）已得到广泛研究。FPSC实际应用中的主要挑战是效率、操作稳定性和机械稳定性。在此，我们开发了一种简便方法，即将三羟甲基丙烷乙氧基化三丙烯酸酯（TET）的交联低聚物掺入钙钛矿薄膜中，以同时提高FPSC的功率转换效率（PCE）和稳定性。实现了20.32%的PCE，这是倒置FPSC的最佳结果之一。掺入TET的FPSC的机械稳定性和环境稳定性均得到改善。特别是，在半径为4毫米的情况下进行20000次弯曲循环后，PCE保留了其初始值的约87%。倒置FPSC在85°C下储存500小时后保留了初始PCE的85%，在连续一个太阳光照900小时后保留了90%。联合实验-理论分析将其潜在机制归因于掺入TET导致柔性基板上钙钛矿吸收体的缺陷密度降低、结晶度提高和稳定性增强。
