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Analysis of the charge transport in π-conjugated materials using generalized Langevin equation
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- Authors
- Seong Hyun Kim, Sang Chul Lim, Jung Hun Lee, Chan Hoi Ku, Jae Bon Koo, Yong Suk Yang, Tae Hyoung Zyung
- Issue Date
- 2006-12
- Citation
- Applied Physics Letters, v.89, no.2, pp.1-3
- ISSN
- 0003-6951
- Publisher
- American Institute of Physics (AIP)
- Language
- English
- Type
- Journal Article
- Abstract
- The complex dielectric constants of several π-conjugated materials are measured, and generalized Langevin equation is used to analyze the dielectric behavior in the frequency domain. From the results of a fitting of the experimental data, all of the dielectric behaviors are well interpreted by the generalized Langevin equation which strongly suggests that the mechanism of the charge carrier transport in π-conjugated organic and polymeric materials is diffusion at dc and low frequencies and an oscillatory motion at (or near) phonon frequencies, and in between, a mixed mode of these two mechanisms. © 2006 Amecrican Institute of Physics.