Vacancy-driven stabilization of the cubic perovskite polymorph of CsPbI3

• Main Authors: Kye, Yun-Hyok, Yu, Chol-Jun, Jong, Un-Gi, Ri, Kum-Chol, Kim, Jin-Song, Choe, Song-Hyok, Hong, Song-Nam, Li, Shuzhou, Wilson, Jacob N., Walsh, Aron
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Materials; Perovskite; Chemical Analysis
• Online Access: https://hdl.handle.net/10356/144479
• Institution: Nanyang Technological University

The inorganic halide perovskite CsPbI3 has shown great promise for efficient solar cells, but the instability of its cubic phase remains a major challenge. We present a route for stabilizing the cubic α-phase of CsPbI3 through the control of vacancy defects. Analysis of the ionic chemical potentials...