Universität zu Köln

Devizis, A., Meerholz, K., Hertel, D. and Gulbinas, V. (2010). Hierarchical charge carrier motion in conjugated polymers. Chem. Phys. Lett., 498 (4-6). S. 302 - 307. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 0009-2614

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Abstract

Motion of photogenerated charge carriers in p-conjugated polymer films with different disorder and chain orientation and also in a blend of conducting and insulating polymers has been investigated by means of time-resolved electric field-induced second harmonic generation technique. Experimental results and Monte Carlo simulation enabled us to distinguish three time domains of charge transport. The charge carriers become separated by about 10 nm in a strong electric field within 1 ps. Subsequently, carriers drift another 10-15 nm on a picosecond time scale with a high mobility. The third and the slowest carrier motion phase is well described by the stochastic drift and determines the macroscopic equilibrium mobility. We attribute the two ultrafast drift phases to carrier motion inside a conjugated segment and along a single polymer chain, respectively, whilst the slow motion phase involves interchain jumps. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Devizis, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hertel, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gulbinas, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-494378
DOI:	10.1016/j.cplett.2010.08.071
Journal or Publication Title:	Chem. Phys. Lett.
Volume:	498
Number:	4-6
Page Range:	S. 302 - 307
Date:	2010
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	0009-2614
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ORGANIC SEMICONDUCTORS; TRANSPORT; MOBILITY; TRANSISTORS Multiple languages Chemistry, Physical; Physics, Atomic, Molecular & Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49437