美国普林斯顿大学Yueh-Lin Loo研究团队报道了全无机、界面稳定的钙钛矿太阳能电池的加速老化。相关研究成果发表在2022年6月16日出版的《科学》。

为了理解钙钛矿型太阳能电池（PSCs）的降解途径并提高其稳定性，需要进行加速老化试验。

该文中，研究人员使用高温（高达110℃）来量化在恒定光照下封装的CsPbI₃ PSCs的加速降解。在钙钛矿活性层和空穴传输层之间加入2D Cs₂PbI₂Cl₂覆盖层，可以稳定界面，同时将全无机PSCs的功率转换效率从14.9%提高到17.4%。具有该2D覆盖层的器件在35℃下不会降解，并且需要在110℃下在恒定照明下超过2100小时才能降解其初始效率的20%。基于观察到的Arrhenius温度依赖性的降解加速因子，预测其在35℃下连续运行的固有寿命为51000±7000小时（>5年）。

附：英文原文

Title: Accelerated aging of all-inorganic, interface-stabilized perovskite solar cells

Author: Xiaoming Zhao, Tianran Liu, Quinn C. Burlingame, Tianjun Liu, Rudolph HolleyIII, Guangming Cheng, Nan Yao, Feng Gao, Yueh-Lin Loo

Issue&Volume: 2022-06-16

Abstract: To understand degradation routes and improve the stability of perovskite solar cells (PSCs), accelerated aging tests are needed. Here, we use elevated temperatures (up to 110 Celsius) to quantify the accelerated degradation of encapsulated CsPbI3 PSCs under constant illumination. Incorporating a 2D Cs2PbI2Cl2 capping layer between the perovskite active layer and hole-transport layer stabilizes the interface while increasing power conversion efficiency of the all-inorganic PSCs from 14.9% to 17.4%. Devices with this 2D capping layer did not degrade at 35 Celsius and required >2100 hours at 110 Celsius under constant illumination to degrade by 20% of their initial efficiency. Degradation acceleration factors based on the observed Arrhenius temperature dependence predict intrinsic lifetimes of 51,000 ± 7,000 hours (>5 years) operating continuously at 35 Celsius.

DOI: abn5679

Source: https://www.science.org/doi/10.1126/science.abn5679