热触发动态二硫键自修复无机钙钛矿太阳能电池
Thermal-Triggered Dynamic Disulfide Bond Self-Heals Inorganic Perovskite Solar Cells.
作者信息
Zhang Qiaoyu, Duan Jialong, Guo Qiyao, Zhang Junshuai, Zheng Dengduan, Yi Fangxuan, Yang Xiya, Duan Yanyan, Tang Qunwei
机构信息
College of Information Science and Technology, Jinan University, Guangzhou, 510632, PR China.
State Centre for International Cooperation on Designer Low-Carbon and Environmental Material (SCICDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, PR China.
出版信息
Angew Chem Int Ed Engl. 2022 Feb 14;61(8):e202116632. doi: 10.1002/anie.202116632. Epub 2022 Jan 11.
One great challenge for perovskite solar cells (PSCs) lies in their poor operational stability under harsh stimuli by humidity, heat, light, etc. Herein, a thermal-triggered self-healing polyurethane (PU) is tailored to simultaneously improve the efficiency and stability of inorganic CsPbIBr PSCs. The dynamic covalent disulfide bonds between adjacent molecule chains in PU at high temperatures self-heal the in-service formed defects within the CsPbIBr perovskite film. Finally, the best device free of encapsulation achieves a champion efficiency up to 10.61 % and an excellent long-term stability in an air atmosphere over 80 days and persistent heat attack (85 °C) over 35 days. Moreover, the photovoltaic performances are recovered by a simple heat treatment.
钙钛矿太阳能电池（PSCs）面临的一个巨大挑战在于其在湿度、热、光等恶劣刺激下运行稳定性较差。在此，定制了一种热触发自修复聚氨酯（PU），以同时提高无机CsPbIBr PSCs的效率和稳定性。高温下PU中相邻分子链之间的动态共价二硫键可自愈CsPbIBr钙钛矿薄膜中服役期间形成的缺陷。最终，最佳的无封装器件实现了高达10.61%的冠军效率，在空气气氛中超过80天具有出色的长期稳定性，在持续热攻击（85°C）下超过35天也具有出色的长期稳定性。此外，通过简单的热处理可恢复光伏性能。
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