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 spectra shift in energy upon varying the excitation wavelength, showing a localization threshold within the absorption tail. The data are explained in terms of triplet energy migration to the longest conjugated segments.
Triplet photoexcitations in a polythiophene with a high degree of energetic disorder
Catellani M;Luzzati S
2001
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 spectra shift in energy upon varying the excitation wavelength, showing a localization threshold within the absorption tail. The data are explained in terms of triplet energy migration to the longest conjugated segments.File in questo prodotto:
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