[19p-Z29-1~13] 15.7 Crystal characterization, impurities and crystal defects

△ [19p-Z29-7] Effect of Copper Doping on the Crystal Structure of MAPbBr₃

〇Kodai Nakao¹, Amr Elattar¹, Ryuji Mishima¹, Hirotaka Inoue¹, Hiroo Suzuki¹, Takeshi Nishikawa¹, Yasuhiko Hayashi¹ (1.Okayama Univ.)

Keywords:perovskite

Organic-inorganic hybrid perovskites such as methylammonium (MAPbBr₃) have a high Seebeck coefficient and low thermal conductivity suitable for thermoelectric conversion materials. Although the low conductivity can be improved by doping, it is important to investigate the crystal structure because the crystal distortion caused by atomic substitution may degrade the electrical properties. In this study, we prepared Cu-doped MAPbBr₃ crystals and performed X-ray diffraction measurements, and concluded that the crystal distortion caused by Cu substitution is very small.