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Updated: Jul 11, 2025

Raman and IR Spectroelectrochemical Methods as Tools to Analyze Conjugated Organic Compounds
Published on: October 12, 2018
Spectral Analysis of Bloch-Like Oscillations in Conjugated Polymers
1School of Mathematics and Science, Hebei GEO University, Shijiazhuang 050031, China.
Abstract:
We present a spectrum investigation of the behavior of dissociated polarons under high electric fields in conjugated polymers. The study employs the Su-Schrieffer-Heeger model along with nonadiabatic molecular dynamics and frequency-domain analysis methods to analyze the Bloch-like oscillations. It is found that the fundamental frequencies of the current density agree well with the theoretical Bloch frequencies of the perfect crystals. The electron-phonon coupling is a key factor in inducing the deviation between the Bloch-like oscillation behavior in conjugated polymers and that in perfect superlattices. Moreover, the increase in lattice thermal fluctuation is not conducive to the maintenance of Bloch-like oscillation behavior in conjugated polymers.
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