Rugeng Liu, Jiahong Wang, Chun Hong Mak, Minshu Du, Fang-Fang Li, Hsin-Hui Shen, Shella Permatasari Santoso, Edward T. Yu, Xuefeng Yu, Paul K. Chu, Hsien-Yi Hsu
The incorporation of black phosphorus (BP) into methylammonium lead iodide (MAPbI3) perovskites has been investigated and optimized by a high throughput screening method using scanning photoelectrochemical microscopy (SPECM) to determine how the addition of BP affects its photoelectrochemical and photovoltaic properties. An optimum ratio of 2.0 mole% BP/MAPbI3 perovskite composite generates an increased photocurrent response compared to pristine MAPbI3 for 2 mM benzoquinone (BQ) reduction at −0.6 V vs Ag/AgNO3 on a spot array electrode under illumination. Due to the relatively high quantum yield of MAPbI3, time-resolved photoluminescence measurements have been conducted to investigate photophysical behaviors of BP/MAPbI3 composites. The optimal 2.0 mole% BP/MAPbI3 exhibits an increased electron-hole diffusion lifetime compared to the pristine MAPbI3 perovskite. Finally, we demonstrate the enhanced efficiency and stability of 2.0% BP/MAPbI3-based perovskite solar cells arising from impeded Pb0-defect generation and suppressed charge-carrier recombination. © 2022 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited.
School of Energy and Environment, City University of Hong Kong, Kowloon Tong, Hong Kong, Hong Kong; Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, Hong Kong; Shenzhen Research Institute, City University of Hong Kong, Shenzhen, 518057, China; Department of Physics, City University of Hong Kong, Kowloon, Hong Kong, Hong Kong; Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi, Xi’an, 710072, China; School of Materials Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, China; Department of Materials Science and Engineering, Faculty of Engineering, Monash University, Clayton, 3800, VIC, Australia; Chemical Engineering Department, Widya Mandala Surabaya Catholic University, East Java, Indonesia; Microelectronics Research Center, Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, 78758, TX, United States