Photocurrent in conjugated polymers

Baruch Horovitz; Ehoud Pazy

doi:10.1209/epl/i2003-10102-7

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Photocurrent in conjugated polymers

Baruch Horovitz·Ehoud Pazy

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Abstract

Nonlinear photocurrent carriers in conjugated polymers, such as polarons, bipolarons and solitons, are considered at low photon energies where a tunnelling process is necessary. We show that polarons usually dominate the photocurrent I due to a novel electric field assisted tunnelling for which ln(I) ~ -E^{-2/3}. For near degenerate polymers an electric field E which exceeds the confinement potential and frequencies above twice the soliton energy, soliton tunnelling is favored. Photocurrent data can then be used to identify the remarkable phenomenon of soliton conduction.

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Baruch Horovitz, Ehoud Pazy. 2003-04-23. Photocurrent in conjugated polymers. https://doi.org/10.1209/epl%2Fi2003-10102-7

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