Wang, LiangYang, ShuzhangHan, QianjiYu, FengyangZhang, HongCai, XiaoyongZhang, ChuGao, LiguoMa, Tingli2021-10-092021-10-092021-10-092021-09-2410.1002/cssc.202101592https://infoscience.epfl.ch/handle/20.500.14299/182056WOS:000698722000001Power conversion efficiencies (PCEs) of up to 25.5 % have been reported for perovskite solar cells (PSCs). Thus, they have shown great potential for commercial applications. Therefore, simplifying technological process and reducing production costs have been a widespread concern among scientific and industrial communities. In this study, PSCs are prepared with the simplest device architecture (FTO/MAPbI(3)/carbon). A high-quality perovskite film with few interface defects and good carrier transport is obtained by tuning the p-n properties, matching energy levels, and enhancing carrier collection and transport. A PCE of 12.01 % is achieved, which is the best reported to date for this device structure. The device also shows excellent long-term stability, owing to the elimination of charge transport layers and the usage of hydrophobic materials. This study provides a new approach to reduce production costs and simplify production of PSCs.Chemistry, MultidisciplinaryGreen & Sustainable Science & TechnologyChemistryScience & Technology - Other Topicscarboncharge transportperovskitessolar cellssurface passivationefficiencydynamicscontacttext::journal::journal article::research article