Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
Photoinduced Polarons and Exciton in Polythiophene Films
Keiichi KanetoFumito UesugiKatsumi Yoshino
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1987 Volume 56 Issue 10 Pages 3703-3709

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Abstract

Absorption and luminescence induced by a photoexeitation are studied in polythiophene and poly(3-methylthiophene) films. The photoinduced absorption spectra which are nearly consistent with those of dopant-induced absorption at dilute doping levels indicate that the dominant photoinduced charged species are polarons. It is found that the magnitude of photoinduced absorption is rather independent on the condition of sample preparation, whereas the photoluminecence intensity is strongly influenced. The result suggests that the luminescent exciton does not play a primary role in the photogeneration of polaronic species.

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