Photoinduced transient stark spectroscopy in organic semiconductors: a method for charge mobility determination in the picosecond regime

Subpicosecond photoinduced Stark spectroscopy experiments are carried out for measuring charge carrier mobility in organic semiconductors. The technique is demonstrated in state-of-art devices based on methanofullerene. The transient mobility of photogenerated charge carriers is measured in the pico...

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Published inPhysical review letters Vol. 96; no. 10; p. 106601
Main Authors Cabanillas-Gonzalez, J, Virgili, T, Gambetta, A, Lanzani, G, Anthopoulos, T D, de Leeuw, D M
Format Journal Article
LanguageEnglish
Published United States 17.03.2006
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Summary:Subpicosecond photoinduced Stark spectroscopy experiments are carried out for measuring charge carrier mobility in organic semiconductors. The technique is demonstrated in state-of-art devices based on methanofullerene. The transient mobility of photogenerated charge carriers is measured in the picosecond time domain. Electric field dependent mobility is observed from the earliest time scales. In addition, two distinct transport regimes are revealed: a short-lived state, approximately 10 ps, of high mobility and a transient towards the trap limited transport, associated with the mesoscopic structure of the medium.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.96.106601