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Proceedings Paper

Fast photoresponse in organic semiconductors: understanding the mechanisms and structure-property relationships
Author(s): Oksana Ostroverkhova; Svitlana Shcherbyna; David G. Cooke; Ray Egerton; Rik R. Tykwinski; John E. Anthony; Frank A. Hegmann
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Paper Abstract

We present a comprehensive study of ultrafast time-resolved photconductivity in pentacene and functionalized pentacene single crystals and thin films measured using optical pump-terahertz probe technique. By investigating the wavelength and temperature dependence of the transient photoconductivity, we reveal a sub-picosecond wavelength-independent charge carrier photogeneration and band-like charge transport in both single crystal and thin film samples. The amplitude and decay dynamics of the photoconductivity transients are correleated with the morphology of the films, assessed by atomic force and electron microscopy.

Paper Details

Date Published: 15 October 2004
PDF: 12 pages
Proc. SPIE 5517, Linear and Nonlinear Optics of Organic Materials IV, (15 October 2004); doi: 10.1117/12.562334
Show Author Affiliations
Oksana Ostroverkhova, Univ. of Alberta (Canada)
Svitlana Shcherbyna, Univ. of Alberta (Canada)
David G. Cooke, Univ. of Alberta (Canada)
Ray Egerton, Univ. of Alberta (Canada)
Rik R. Tykwinski, Univ. of Alberta (Canada)
John E. Anthony, Univ. of Kentucky (United States)
Frank A. Hegmann, Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 5517:
Linear and Nonlinear Optics of Organic Materials IV
Robert A. Norwood; Manfred Eich; Mark G. Kuzyk, Editor(s)

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