[9p-P14-1~3] 15.7 Crystal characterization, impurities and crystal defects

[9p-P14-3] Cu Doping Effects in Double Perovskite Semiconductor Cs₂AgSbCl₆ with Defects

〇Masataka Unose¹, Kiyoto Matsuishi¹ (1.Tsukuba Univ.)

Keywords:

perovskite semiconductor,impurity effect

Double perovskite semiconductors are attracting attention as lead-free solar cell materials. In this study, we prepared Cu-doped Cs₂AgSbCl₆ single crystals and investigated the defect states of Cs₂AgSbCl₆ single crystals, which have not been prepared before. Single crystals with different Cu content ratios were prepared by hydrothermal synthesis, and it was confirmed that the cubic Fm3-m structure is observed and that the lattice constant decreases with increasing Cu content. Furthermore, the valence state and composition of each element were investigated, and the difference in Sb/Cs ratio between black and yellow single crystals existing as Cs₂AgSbCl₆ was evaluated.