Universität zu Köln

Devizis, A., Meerholz, K., Hertel, D. and Gulbinas, V. (2010). Ultrafast charge carrier mobility dynamics in poly(spirobifluorene-co-benzothiadiazole): Influence of temperature on initial transport. Phys. Rev. B, 82 (15). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

In this work we examine the influence of temperature on the transport dynamics of photogenerated charge carriers in pi-conjugated poly(spirobifluorene-co-benzothiadiazol) films. Investigations were performed by picosecond time-resolved electric field induced second-harmonic technique. The mobility is independent of temperature during the initial 100 ps. During this time, the carriers drift about 6 nm under an applied field of 1.2 x 10(6) V/cm, and the mobility decreases from 3 x 10(-2) cm(2)/V s by one order of magnitude. We attribute this change in mobility to the intrachain charge transport during carrier relaxation down in the density of states. At a time delay of 1 ns the transport is temperature dependent with an activation energy of about 22 meV.

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:38-494274
DOI:	10.1103/PhysRevB.82.155204
Journal or Publication Title:	Phys. Rev. B
Volume:	82
Number:	15
Date:	2010
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language 2ND-HARMONIC GENERATION; TRANSIENT PHOTOCONDUCTIVITY; CONJUGATED POLYMERS; ELECTRIC-FIELDS; POLY(P-PHENYLENEVINYLENE); TRANSISTORS; RELAXATION; DEPENDENCE; PROBE; FILMS Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49427