Triplet photoexcitations in a polythiophene with a high degree of energetic disorder

Authors
Colabella, E Borghesi, A Tubino, R Catellani, M Luzzati, S
Citation
E. Colabella et al., Triplet photoexcitations in a polythiophene with a high degree of energetic disorder, SYNTH METAL, 119(1-3), 2001, pp. 613-614
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
119
Issue
1-3
Year of publication
2001
Pages
613 - 614
Database
ISI
SICI code
0379-6779(20010315)119:1-3<613:TPIAPW>2.0.ZU;2-Q
Abstract
We report a photophysical study of a polythiophene with a wide distribution of conjugation lengths, obtained by the random copolymerization of 3-butyl and 3,4-butyl thiophenes in a 1/3 ratio. The photoinduced absorption spect ra shift in energy upon varying the excitation wavelength, showing a locali zation threshold within the absorption tail. The data are explained in term s of triplet energy migration to the longest conjugated segments.