Long Minority-Carrier Diffusion Length and Low Surface-Recombination Velocity in Inorganic Lead-Free CsSnI3 Perovskite Crystal for Solar Cells

• Main Authors: Wu, Bo, Zhou, Yuanyuan, Xing, Guichuan, Xu, Qiang, Garces, Hector F., Solanki, Ankur, Goh, Teck Wee, Padture, Nitin P., Sum, Tze Chien
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2017
• Subjects: Carrier dynamics; Lead-free perovskite crystal
• Online Access: https://hdl.handle.net/10356/84069; http://hdl.handle.net/10220/43555
• Institution: Nanyang Technological University

Sn-based perovskites are promising Pb-free photovoltaic materials with an ideal 1.3 eV bandgap. However, to date, Sn-based thin film perovskite solar cells have yielded relatively low power conversion efficiencies (PCEs). This is traced to their poor photophysical properties (i.e., short diffusion l...