[15a-1F-1~10] 12.5 Organic solar cells

[15a-1F-6] Photocarrier diffusion and recombination dynamics in lead-bromide perovskite CH₃NH₃PbBr₃ single crystals

〇(M2)takumi yamada¹, yasuhiro yamada², hidetaka nishimura¹, yumi nakaike¹, atsushi wakamiya¹, yasujiro murata¹, yoshihiko kanemitsu¹ (1.Kyoto Univ., 2.Chiba Univ.)

Keywords:time-resolved photoluminescene spectroscopy,organic-inorganic hybrid,solar cell materials

The dynamical behaviors of photo-excited carriers in CH₃NH₃PbBr₃ single crystals are studied using time-resolved photoluminescence (PL) spectroscopy. A comparison between the one-photon excitation, which excites the vicinity of the sample surface, and the two-photon excitation, which can directly excite the interior region of the sample, was conducted in order to clarify the effects from the spatial distribution of the photocarrier density. From the difference between one- and two-photon PL dynamics, we conclude that the carrier diffusion process has a significant role in the photocarrier dynamics. The photocarrier diffusion and recombination dynamics in CH₃NH₃PbBr₃ single crystals will be discussed.