Institute of Materials Research and Engineering, Agency for Science, Technology and Research, 2 Fusionopolis Way, Singapore 138634, Singapore.
Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
Molecules. 2022 Dec 25;28(1):174. doi: 10.3390/molecules28010174.
Perovskite-related materials show very promising properties in many fields. Pb-free perovskites are particularly interesting, because of the toxicity of Pb. In this study, hybrid double perovskite MAKBiCl (MA = methylammonium cation) was found to have interesting variable temperature behaviours. Both variable temperature single crystal X-ray diffraction, synchrotron powder diffraction, and Raman spectroscopy were conducted to reveal a rhombohedral to cubic phase transition at around 330 K and an order to disorder transition for inorganic cage below 210 K.
钙钛矿相关材料在许多领域表现出非常有前途的性能。由于铅的毒性，无铅钙钛矿尤其引人注目。在这项研究中，发现混合双钙钛矿 MAKBiCl（MA = 甲胺阳离子）具有有趣的变温行为。通过变温单晶 X 射线衍射、同步辐射粉末衍射和拉曼光谱研究，发现其在 330 K 左右发生菱方相向立方相的转变，在 210 K 以下发生无机笼的有序到无序转变。
