Fu Qingxia, Xiao Shuqin, Tang Xianglan, Chen Yiwang, Hu Ting
ACS Appl Mater Interfaces. 2019 Jul 10;11(27):24782-24788. doi: 10.1021/acsami.9b07149. Epub 2019 Jun 26.
Fullerene end-capped polyethylene glycol (C60-PEG) was introduced via an antisolvent method to fabricate the perovskite films. C60-PEG could enlarge the perovskite crystal size and passivate the defects of perovskite films, facilitating the carrier transport and hindering the carrier recombination. In consequence, the superior optoelectronic properties were attained with an improved power conversion efficiency of 17.71% for the perovskite device with C60-PEG treatment. Meanwhile, amphiphilic C60-PEG enhanced the resistance of perovskite films to moisture. After 40 days, the C60-PEG-based devices without encapsulation remained 93 and 86% of the original power conversion efficiency value under nitrogen and ambient conditions (25 °C temperature, 60% humidity), respectively.
通过反溶剂法引入富勒烯封端的聚乙二醇（C60-PEG）来制备钙钛矿薄膜。C60-PEG可以增大钙钛矿晶体尺寸并钝化钙钛矿薄膜的缺陷，促进载流子传输并阻碍载流子复合。因此，经过C60-PEG处理的钙钛矿器件获得了优异的光电性能，功率转换效率提高到了17.71%。同时，两亲性的C60-PEG增强了钙钛矿薄膜的防潮性。40天后，未封装的基于C60-PEG的器件在氮气和环境条件（25℃温度，60%湿度）下分别保持了原始功率转换效率值的93%和86%。
