[22p-P07-1~25] 12.5 Organic solar cells

[22p-P07-12] Temperature dependence of the photoluminescence in lead-free perovskite Cs₂PdBr₆

Shutaro Yoshida¹, 〇Masato Soutome^1,2, Tomonori Matsushita^1,2, Takashi Kondo^1,2 (1.Dept. of Mater. Eng., Univ. of Tokyo, 2.RCAST, Univ. of Tokyo)

Keywords:perovskite, lead-free, Cs2PdBr6

The lead-free perovskite Cs₂PdBr₆ crystal has a double perovskite-type structure with Pd⁴⁺ ion and vacancy, and the absorption edge energy was reported to be 1.58 eV in nanocrystals. However, its optical transition type has not been clarified experimentally. Since the temperature dependence of the photoluminescence intensity depends on the optical transition type (direct or indirect), we measured the temperature dependence of the laser-excited photoluminescence in Cs₂PdBr₆ nanocrystals.