Photoluminescence in poly(3-hexylthiophene)

Ifor D W Samuel; Laura Magnani; Gary Rumbles; Ken Murray; Bradley M. Stone; Stephen C. Moratti; Andrew B. Holmes

doi:10.1117/12.279277

Photoluminescence in poly(3-hexylthiophene)

Ifor D W Samuel, Laura Magnani, Gary Rumbles, Ken Murray, Bradley M. Stone, Stephen C. Moratti, Andrew B. Holmes

National Renewable Energy Laboratory

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

9 Citations (Scopus)

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.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Editors	Z.V. Vardeny, L.J. Rothberg
Pages	163-170
Number of pages	8
Volume	3145
DOIs	https://doi.org/10.1117/12.279277
Publication status	Published - 1997
Event	Optical Probes of Conjugated Polymers - San Diego, CA, United States Duration: Jul 28 1997 → Jul 30 1997

Other

Other	Optical Probes of Conjugated Polymers
Country	United States
City	San Diego, CA
Period	7/28/97 → 7/30/97

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Keywords

Photoluminescence
Poly(3-hexylthiophene)
Quantum yield
Singlet exciton
Solvatochromism
Time-resolved spectroscopy

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics

Cite this

Samuel, I. D. W., Magnani, L., Rumbles, G., Murray, K., Stone, B. M., Moratti, S. C., & Holmes, A. B. (1997). Photoluminescence in poly(3-hexylthiophene). In Z. V. Vardeny, & L. J. Rothberg (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3145, pp. 163-170) https://doi.org/10.1117/12.279277

Photoluminescence in poly(3-hexylthiophene). / Samuel, Ifor D W; Magnani, Laura; Rumbles, Gary; Murray, Ken; Stone, Bradley M.; Moratti, Stephen C.; Holmes, Andrew B.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / Z.V. Vardeny; L.J. Rothberg. Vol. 3145 1997. p. 163-170.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Samuel, IDW, Magnani, L, Rumbles, G, Murray, K, Stone, BM, Moratti, SC & Holmes, AB 1997, Photoluminescence in poly(3-hexylthiophene). in ZV Vardeny & LJ Rothberg (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 3145, pp. 163-170, Optical Probes of Conjugated Polymers, San Diego, CA, United States, 7/28/97. https://doi.org/10.1117/12.279277

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AB - 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.

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10.1117/12.279277