The effect of organic cation dynamics on the optical properties in (PEA)₂(MA)[Pb₂I₇] perovskite dimorphs

• Main Authors: Lekina, Yulia, Dintakurti, Sai S. H., Febriansyah, Benny, Bradley, David G., Yan, Jiaxu, Shi, Xiangyan, England, Jason, White, Tim, Hanna, John V., Shen, Zexiang
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2023
• Subjects: Engineering::Materials::Photonics and optoelectronics materials; Dynamics; Hydrogen Bonds
• Online Access: https://hdl.handle.net/10356/153795
• Institution: Nanyang Technological University

Two-dimensional (2D) phenylethyl ammonium (PEA+)-methyl ammonium (MA+) lead iodide ((PEA)2(MA)[Pb2I7]) hybrid perovskite exists as temperature-dependent dimorphs exhibiting an ill-defined phase transition occurring over the 150–200 K range. Raman scattering, photoluminescence, optical absorbance and...