Wang Shumao, Guo Haodan, Wu Jinpeng, Lei Yan, Li Xiangrong, Fang Yanyan, Dai Yuhua, Xiang Wanchun, Lin Yuan
College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China.
Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, China.
Chem Commun (Camb). 2022 Jul 26;58(60):8384-8387. doi: 10.1039/d2cc02354g.
A high-conductivity thiocyanate ionic liquid (EMIMSCN) was introduced into perovskite solar cells for the first time. The high conductivity of EMIMSCN ensures an adequate supply of free SCN anions and EMIM cations, so as to multifunctionally passivate the I vacancy and Pb-I antisite defects and realize an optimized interfacial energy level. Consequently, the devices with EMIMSCN treatment achieve a high PCE of 22.55% with substantial enhancement in stability. This simple and efficient strategy provides new insights into the selection of passivation agents for efficient and stable PSCs.
一种高导电性的硫氰酸盐离子液体（EMIMSCN）首次被引入到钙钛矿太阳能电池中。EMIMSCN的高导电性确保了游离SCN阴离子和EMIM阳离子的充足供应，从而多功能地钝化I空位和Pb-I反位缺陷，并实现优化的界面能级。因此，经过EMIMSCN处理的器件实现了22.55%的高功率转换效率（PCE），稳定性也有显著提高。这种简单而有效的策略为高效稳定的钙钛矿太阳能电池钝化剂的选择提供了新的思路。
