[23a-C106-1~8] 12.2 Characterization and Materials Physics

[23a-C106-6] 【Highlighted Presentation】Charge transport properties and band-dispersion modulation induced by low-frequency intramolecular vibration modes of organic semiconductors

〇Hiroyuki Ishii¹, Hiroyuki Yoshida^2,3, Nobuhiko Kobayashi¹ (1.Univ. of Tsukuba, 2.GSE Chiba Univ., 3.MCRC Chiba Univ.)

Keywords:organic semiconductors, charge transport, electron-phonon interactions

In general, mobility of electrons is an order of magnitude lower than that of holes. It is one of the problem on practical application. However, the microscopic origin has not been clarified yet. In this study, we employed our original large-scale transport simulation method "time-dependent wave-packet diffusion method" and experimental techniques called "(inverse) photoelectron spectroscopy" and showed that low-frequency intramolecular vibrational modes largely modulate the electronic band dispersion. Furhtermore, we found that the electron is strongly scatted by the vibrations in comparison with holes.