| Issue |
Europhys. Lett.
Volume 65, Number 3, February 2004
|
|
|---|---|---|
| Page(s) | 386 - 392 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2003-10102-7 | |
| Published online | 01 January 2004 | |
Photocurrent in conjugated polymers
Department of Physics and Ilze Katz center for nanotechnology Ben-Gurion University of the Negev - Beer-Sheva 84105, Israel
Received:
2
June
2003
Accepted:
28
November
2003
Non-linear 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 dominate the photocurrent I due to a novel
electric-field–assisted tunnelling route for which 
. For near-degenerate polymers with an electric field E
which exceeds the confinement parameter and frequencies near
twice the soliton energy, soliton formation is favored.
Photocurrent data can then be used to identify the remarkable
soliton conduction.
PACS: 71.38.-k – Polarons and electron-phonon interactions / 72.15.Nj – Collective modes (e.g., in one-dimensional conductors) / 71.38.Mx – Bipolarons
© EDP Sciences, 2004
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