Fast photoresponse in organic semiconductors: understanding the mechanisms and structure-property relationships

Oksana Ostroverkhova; Svitlana Shcherbyna; David G. Cooke; Ray Egerton; Rik R. Tykwinski; John E. Anthony; Frank A. Hegmann

doi:10.1117/12.562334

15 October 2004 Fast photoresponse in organic semiconductors: understanding the mechanisms and structure-property relationships

Oksana Ostroverkhova, Svitlana Shcherbyna, David G. Cooke, Ray Egerton, Rik R. Tykwinski, John E. Anthony, Frank A. Hegmann

Author Affiliations +

Proceedings Volume 5517, Linear and Nonlinear Optics of Organic Materials IV; (2004) https://doi.org/10.1117/12.562334
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

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Oksana Ostroverkhova, Svitlana Shcherbyna, David G. Cooke, Ray Egerton, Rik R. Tykwinski, John E. Anthony, and Frank A. Hegmann "Fast photoresponse in organic semiconductors: understanding the mechanisms and structure-property relationships", Proc. SPIE 5517, Linear and Nonlinear Optics of Organic Materials IV, (15 October 2004); https://doi.org/10.1117/12.562334

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