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Proceedings Paper

Photoluminescence in poly(3-hexylthiophene)
Author(s): Ifor D. W. Samuel; Laura Magnani; Garry Rumbles; Ken Murray; Bradley M. Stone; Stephen C. Moratti; Andrew B. Holmes
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Paper Abstract

We report a study of the photophysics of solutions and films of the conjugated polymer poly(3-hexylthiophene) (P3HT). We have performed measurements of absorption, photoluminescence (PL), PL quantum yield, and time-resolved PL. For P3HT in a good solvent the PL decays with a time constant of 510 +/- 20 ps, and the PL quantum yield is 0.42 +/- 0.04, we assign the PL to the intra-chain singlet exciton, and deduce a natural radiative lifetime for this species of 1.2 +/- 0.1 ns. We explore the use of solvent mixture as a way of controlling the degree of intermolecular interaction. We find that there is a red-shift of absorption and PL in poor solvent mixtures, and the spectra and PL quantum yield become similar to the film. The PL decay becomes faster and non-exponential in poor solvent mixtures and the thin film.

Paper Details

Date Published: 1 December 1997
PDF: 8 pages
Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); doi: 10.1117/12.279277
Show Author Affiliations
Ifor D. W. Samuel, Univ. of Durham (United Kingdom)
Laura Magnani, Imperial College of Science, Technology and Medicine (United Kingdom)
Garry Rumbles, Imperial College of Science, Technology and Medicine (United Kingdom)
Ken Murray, Univ. of Cambridge (United Kingdom)
Bradley M. Stone, San Jose State Univ. (United States)
Stephen C. Moratti, Univ. of Cambridge (United Kingdom)
Andrew B. Holmes, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 3145:
Optical Probes of Conjugated Polymers
Z. Valy Vardeny; Lewis J. Rothberg, Editor(s)

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