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Photoluminescence and Odmr Studies of Pristine and Photodegraded Poly (3-Hexylthiophene) Films and Solutions

Published online by Cambridge University Press:  25 February 2011

L. S. Swanson ,
J. Shinar ,
L. R. Lichty  and
K. Yoshino
L. S. Swanson
Affiliation:
Ames Laboratory - USDOE and Physics Department, Iowa State University, Ames, IA 50011–3020
J. Shinar
Affiliation:
Ames Laboratory - USDOE and Physics Department, Iowa State University, Ames, IA 50011–3020
L. R. Lichty
Affiliation:
Ames Laboratory - USDOE and Physics Department, Iowa State University, Ames, IA 50011–3020
K. Yoshino
Affiliation:
Department of Electrical Engineering, Faculty of Engineering, Osaka University, Osaka 565, Japan.
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Abstract

The photoluminescence (PL) and optically detected magnetic resonance (ODMR) spectra of poly(3-hexylthiophene) in solutions of CCl4, toluene, and CH2Cl2, and films cast from these solutions, are described and discussed. In solution, the PL yield is 7%, and increases with increasing temperature. In oxygen-free, protected films cast from these solutions, the room-temperature yield is ∼0.7%, the spectra is red shifted by ∼0.5eV, and strong peaks at 1.52, 1.69, and 1.86eV appear. In films and CH2Cl2 solutions, the ODMR is resolvable into narrow and broad components, and its intensity ΔL/L is ∼5 × l0−5 at room temperature. A strong photoinduced oxidation process quenches the PL upon exposure to O2 but not water, at a rate possibly limited by O2 diffusion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 173: Symposium Q – Advanced Organic Solid State Materials , 1989 , 385
Copyright
Copyright © Materials Research Society 1990

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References

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