Affiliation:
1. School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and Technology Guangdong Provincial Key Laboratory of Low Carbon Chemistry and Process Energy Conservation Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices Sun Yat‐sen University Guangzhou 510275 P. R. China
2. Institute for Photovoltaics University of Stuttgart DE‐70569 Pfaffenwaldring 47 Stuttgart Germany
3. Helmholtz Young Investigator Group FRONTRUNNER IEK‐5 Photovoltaik Forschungszentrum Jülich GmbH 52425 Jülich Germany
Abstract
AbstractPb‐Sn mixed perovskite has received extensive attention because of its high research value in environmental protection and theoretical prospects. However, the film defects brought on by the quick crystallization of Pb‐Sn mixed perovskites and the facile oxidation of Sn2+ to Sn4+ are detrimental to the performance of Pb‐Sn perovskite solar cells (PSCs). Here, aiming at the interface of Pb‐Sn PSCs, which has been less studied, a reducing agent is first introduced on the top of Pb‐Sn mixed perovskite interface. The results show that in NaBH3CN(SC), B─H can suppress the oxidation of Sn2+ and C≡N can enhance the perovskite crystallinity and passivate the surface defects. Benefitting from this synergistic effect, a champion power conversion efficiency of 21.3% is obtained for Pb‐Sn PSCs. In addition, the encapsulated device can maintain good stability under maximum power point tracking conditions.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
15 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献