Polaron states and charge dynamics in doped conjugated polymers studied by various spectroscopic methods

India-Japan Expert Group Meeting on Biomolecular Electronics & Organic Nanotechnology for Environment Preservation

物理学;生物科学;生态环境科学

Kishida, Hideo^1

Department of Applied Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya

464-8603, Japan^1

关键词: Carrier localization;    Charge dynamics;    Luminescence measurements;    Nonlinear optical process;    Photoexcited state;    Spectroscopic data;    Third-harmonic generation spectroscopies;    Various spectroscopic methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/704/1/012008/pdf
DOI  :  10.1088/1742-6596/704/1/012008

来源: IOP

【 摘 要 】

Various spectroscopic data for doped conjugated polymers are reviewed and discussed. Chemical doping induces polaron states in the conjugated polymers. Two polaron states appear between the π and π∗states. Third harmonic generation spectroscopy reveals the multiply-resonant nonlinear optical processes using the polaron states. The terahertz measurements clarify the carrier localization, which is dependent on the doping levels. The ultrafast luminescence measurements reveal the relaxation process of the photoexcited states of the doped conjugated polymers.