[22p-P10-1~18] 13.8 Optical properties and light-emitting devices

[22p-P10-18] Observation of exciton-exciton scattering in lead-halide perovskites
and evaluation of excitonic property

〇Mizuki Kumamoto¹, Naoki Shimosako², Zihao Liu³, Masato Soutome⁴, Takashi Kondo^3,4, Hideyuki Kunugita¹, Kazuhiro Ema¹ (1.Sophia Univ., 2.Shizuoka Univ., 3.School of Eng., Univ. of Tokyo, 4.RCAST, Univ. of Tokyo)

Keywords:

organic inorganic perovskite,exciton,exciton-exciton scattering

Since lead halide perovskite materials have been suggested to have potential applications in various optical devices, the deep understanding of excitonic properties of these materials is urgently necessary. In this study, APbBr3 (A: CH3NH3, Cs) single-crystal samples were excited by 400-nm laser pulses, and photoluminescence (PL) and reflection spectra and time-resolved PL spectra were measured. From the emission due to exciton-exciton scattering (P-emission), detailed excitonic properties of the samples including the exciton dispersion curve have been investigated.