Photoluminescence from the Even-Parity State in Polythiophene Derivative

Takashi Kobayashi; Jun-ichi Hamazaki; Mitsuyoshi Arakawa; Hideyuki Kunugita; Takeshi Endo; Masahiro Rikukawa; Kohei Sanui; Kazuhiro Ema

doi:10.1143/jpsj.70.2517

Takashi Kobayashi, Jun-ichi Hamazaki, Mitsuyoshi Arakawa, Hideyuki Kunugita, Takeshi Endo, Masahiro Rikukawa, Kohei Sanui, Kazuhiro Ema

Author information

Takashi Kobayashi
Department of Physics, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012
Jun-ichi Hamazaki
Department of Physics, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012
Mitsuyoshi Arakawa
Department of Physics, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012
Hideyuki Kunugita
Department of Physics, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012
Takeshi Endo
Department of Chemistry, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012
Masahiro Rikukawa
Department of Chemistry, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012
Kohei Sanui
Department of Chemistry, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012
Kazuhiro Ema
Department of Physics, Sophia University, Chiyoda, Tokyo 102-8554 and CREST(JST), Kawaguchi, Saitama 332-0012

Keywords: conjugated polymer, polythiophene, photoluminescence, even-parity state, vibronic structure

JOURNAL RESTRICTED ACCESS

2001 Volume 70 Issue 9 Pages 2517-2520

DOI https://doi.org/10.1143/jpsj.70.2517

Details

Abstract

The time-resolved photoluminescence spectrum of a polythiophene derivative has been analyzed from the viewpoint of the vibronic structure and its dynamics. We found that the photoluminescence (PL) originates from two vibronic coupled states which consist of the odd-parity 1B_u component and the even-parity 2A_g component. Since the fluorescences from the two states have different time constants and different vibronic structures, the PL shows a biexponential decay and a spectral change.

Corresponding author

Register with J-STAGE for free!