[9a-Z04-1~12] 13.8 Optical properties and light-emitting devices

[9a-Z04-11] Spin Relaxation Dynamics in CH₃NH₃PbBr₃ Bulk Crystals Revealed by Optical Microspectroscopy

〇Nanako Igarashi¹, Kenichi Oto¹, Yoshihiko Kanemitsu², Yasuhiro Yamada¹ (1.Chiba Univ., 2.Kyoto Univ.)

Keywords:halide perovskite, spin, photoluminescence

In this study, we performed time- and polarization-resolved optical microspectroscopy in CH₃NH₃PbBr₃ bulk crystals at low temperatures below the structural phase transition point. We estimated the free exciton spin relaxation time, which is longer than that previously reported. We clarified that the degree of circular polarization shows spatial dependence.