Phase transitions of formamidinium lead iodide perovskite under pressure

• Main Authors: Jiang, Shaojie, Luan, Yiliang, Jang, Joon Ik, Baikie, Tom, Huang, Xin, Li, Ruipeng, Saouma, Felix Ochieng, Wang, Zhongwu, White, Timothy John, Fang, Jiye
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Chemical engineering; Compression; Physical and Chemical Processes
• Online Access: https://hdl.handle.net/10356/139266
• Institution: Nanyang Technological University

The pressure-induced structural evolution of formamidinium-based perovskite FAPbI3 was investigated using in situ synchrotron X-ray diffraction and laser-excited photoluminescence methods. Cubic α-FAPbI3 ( Pm3̅ m) partially and irreversibly transformed to hexagonal δ-FAPbI3 ( P63 mc) at a pressure l...