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Photoinduced Charge Transfer Between Tetracyano-Anthraquino-Dimethane Derivatives and Conjugated Polymers

Published online by Cambridge University Press:  21 March 2011

G. Zerza ,
M. Scharber ,
J. L. Segura ,
R. Gomez ,
N. Martin  and
N. S. Sariciftci
G. Zerza
Affiliation:
Physikalische Chemie, Johannes Kepler Universität, 4040 Linz, Austria
M. Scharber
Affiliation:
Physikalische Chemie, Johannes Kepler Universität, 4040 Linz, Austria
J. L. Segura
Affiliation:
Departamento de Química Orgánica, Universidad Complutense, 28040 Madrid, Spain
R. Gomez
Affiliation:
Departamento de Química Orgánica, Universidad Complutense, 28040 Madrid, Spain
N. Martin
Affiliation:
Departamento de Química Orgánica, Universidad Complutense, 28040 Madrid, Spain
N. S. Sariciftci
Affiliation:
Physikalische Chemie, Johannes Kepler Universität, 4040 Linz, Austria
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Abstract

The photo-induced charge transfer between tetracyano-anthraquino-dimethane (TCAQ) derivatives and poly(2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylene vinylene) MDMO-PPV was studied by means of photoinduced absorption (PIA) spectroscopy in the VIS and IR spectral region and lightinduced electron spin resonance (LESR) spectroscopy. Three different TCAQ derivatives with alkyl-side chains for increased solubility compared to TCAQ and one of them attached to a C60 molecule serve as strong electron acceptors. The photoinduced absorption in the VIS near-IR range shows a broad plateau around 1.8 eV followed by two peaks at 1.35 and 1.24eV for all three acceptors. All PIA features have a power law excitation intensity dependence with an exponent close to 0.5 as expected for bimolecular kinetics. The modulation frequency dependent excited state absorption decreases with a power law. LESR studies of all donor-acceptor combinations show one radical line at a g = 2.0028 with.H = 3.5 Gauss, originating from TCAQ anion and the polymer cation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 598: Symposium BB – Electrical, Optical, & Magenetic Properties...V , 1999 , BB3.28
Copyright
Copyright © Materials Research Society 1999

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