[21a-W531-1~11] 12.5 Organic solar cells

[21a-W531-7] Time and space resolved photoluminescence dynamics in CH₃NH₃PbBr₃ single crystals

〇(M2)takumi yamada¹, Yumi Nakaike¹, Atsushi Wakamiya¹, Yoshihiko Kanemitsu¹ (1.ICR, Kyoto Univ.)

Keywords:perovskite semiconductor,organic-inorganic hybrid,two-photon excitation microscopy

Time and space resolved photoluminescence (PL) dynamics in CH₃NH₃PbBr₃ single crystals was studied using time-resolved two-photon-excitation PL microscopy. The PL peak red-shifted as the excitation depth deepened from the sample surface. The PL intensities decrease non-exponentially, and the PL lifetime becomes longer as the excitation depth gets deeper. These observations can be explained by a model including photocarrier diffusion and photon recycling effects.