Optimizing Black Phosphorus/Halide Perovskite Compositions by Scanning Photoelectrochemical Microscopy

作者：Liu, Rugeng; Wang, Jiahong; Mak, Chun Hong; Du, Minshu; Li, Fang-Fang; Shen, Hsin-Hui; Santoso, Shella Permatasari; Yu, Edward T.; Yu, Xuefeng; Chu, Paul K.^*; Hsu, Hsien-Yi

来源：Journal of the Electrochemical Society, 2022, 169(9): 096510.

DOI：10.1149/1945-7111/ac8d34

• LEAD IODIDE PEROVSKITES
• HALIDE PEROVSKITE
• HIGHLY EFFICIENT
• ORGANIC CATIONS
• SOLAR-CELLS
• TRANSPORT
• ELECTRON
• ELECTRODEPOSITION
• PHOTOCATALYSTS
• OPTIMIZATION

The incorporation of black phosphorus (BP) into methylammonium lead iodide (MAPbI(3)) 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/MAPbI(3) perovskite composite generates an increased photocurrent response compared to pristine MAPbI(3) 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 MAPbI(3), time-resolved photoluminescence measurements have been conducted to investigate photophysical behaviors of BP/MAPbI(3) composites. The optimal 2.0 mole% BP/MAPbI(3) exhibits an increased electron-hole diffusion lifetime compared to the pristine MAPbI(3) perovskite. Finally, we demonstrate the enhanced efficiency and stability of 2.0% BP/MAPbI(3)-based perovskite solar cells arising from impeded Pb-0-defect generation and suppressed charge-carrier recombination.

• 单位
  西北工业大学; 华中科技大学; 中国科学院