title: Dual-Source Precursor Approach for Highly Efficient Inverted Planar Heterojunction Perovskite Solar Cells.
abstract: The highest efficiencies reported for perovskite solar cells so far have been obtained mainly with methylammonium and formamidinium mixed cations. Currently, high-quality mixed-cation perovskite thin films are normally made by use of antisolvent protocols. However, the widely used "antisolvent"-assisted fabrication route suffers from challenges such as poor device reproducibility, toxic and hazardous organic solvent, and incompatibility with scalable fabrication process. Here, a simple dual-source precursor approach is developed to fabricate high-quality and mirror-like mixed-cation perovskite thin films without involving additional antisolvent process. By integrating the perovskite films into the planar heterojunction solar cells, a power conversion efficiency of 20.15% is achieved with negligible current density-voltage hysteresis. A stabilized power output approaching 20% is obtained at the maximum power point. These results shed light on fabricating highly efficient perovskite solar cells via a simple process, and pave the way for solar cell fabrication via scalable methods in the near future.
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Deying
authors.initials: D
authors.lastname: Luo
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Lichen
authors.initials: L
authors.lastname: Zhao
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Wu
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.|Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.|Materials Sciences Division, Lawrence Berkeley National Laboratory, CA, 94720, USA.
authors.forename: Qin
authors.initials: Q
authors.lastname: Hu
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Zhaojian
authors.initials: Z
authors.lastname: Xu
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Tanghao
authors.initials: T
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Chen
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Yang
authors.affiliation: School of Chemistry, Joseph Banks Laboratories, University of Lincoln, Beevor Street, Lincoln, LN6 7DL, UK.|Advanced Technology Institute, University of Surrey, Guildford, GU2 7XH, UK.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.|Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhu
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.|Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China.
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong
keywords: dual-source precursor approaches; inverted planar heterojunctions; perovskite solar cells; stable mixed-cation perovskites