A high-frequency light-induced electron spin resonance study of conjugatedpolymer/fullerene composites

Authors
De Ceuster, J Goovaerts, E Bouwen, A Dyakonov, V Hummelen, JC
Citation
J. De Ceuster et al., A high-frequency light-induced electron spin resonance study of conjugatedpolymer/fullerene composites, SYNTH METAL, 124(1), 2001, pp. 99-101
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
124
Issue
1
Year of publication
2001
Pages
99 - 101
Database
ISI
SICI code
0379-6779(20011003)124:1<99:AHLESR>2.0.ZU;2-T
Abstract
Light-induced electron spin resonance (LESR) measurements are reported in c omposites of MDMO-PPV and PCBM, a soluble derivative of C-60. After illurai nation of the sample, two radicals are formed. One is the remaining positiv e polaron P+ on the polymer backbone and the other the C-61(.-) radical ani on. Using high-frequency (95 GHz) LESR, it was possible to separate these t wo contributions to the spectrum on the basis of their g-parameters, and to resolve the g-anisotropy of the radicals. The P+-polaron possesses axial s ymmetry whereas for C-61(.-) a lower, rhombic symmetry was observed. (C) 20 01 Elsevier Science B.V. All rights reserved.