Du Jian, Duan Jialong, Yang Xiya, Duan Yanyan, Zhou Quanzhu, Tang Qunwei
College of Information Science and Technology, Jinan University, Guangzhou, 510632, P. R. China.
State Centre for International Cooperation on Designer Low-Carbon and Environmental Material (SCICDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Angew Chem Int Ed Engl. 2021 May 3;60(19):10608-10613. doi: 10.1002/anie.202016703. Epub 2021 Mar 25.
The precise regulation of interfacial charge distribution highly determines the power conversion efficiency of perovskite solar cells (PSCs). Herein, inorganic (NiCo) Fe O nanoparticle decorated graphene oxide (GO) is successfully demonstrated as a hole booster for all-inorganic CsPbIBr PSC free of precious metal electrode. Arising from the spontaneous electron transfer induced p-type doping of GO from edged oxygen-containing functional groups to (NiCo) Fe O , the best all-inorganic CsPbIBr PSC achieves an efficiency of 10.95 % under one standard sun owing to the eliminated paradox between charge extraction and charge localization in GO surface. Furthermore, the champion device exhibits an excellent long-term stability at 10 % relative humidity without encapsulation over 70 days because of the suppressed ions migration.
界面电荷分布的精确调控在很大程度上决定了钙钛矿太阳能电池（PSC）的功率转换效率。在此，无机（NiCo）Fe O纳米颗粒修饰的氧化石墨烯（GO）被成功证明是一种用于无贵金属电极的全无机CsPbIBr PSC的空穴增强剂。由于从边缘含氧官能团到（NiCo）Fe O的自发电子转移诱导了GO的p型掺杂，最好的全无机CsPbIBr PSC在一个标准太阳光照下实现了10.95%的效率，这是因为消除了GO表面电荷提取和电荷局域化之间的矛盾。此外，由于抑制了离子迁移，冠军器件在10%相对湿度下无封装可保持超过70天的优异长期稳定性。
