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 |
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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 | |
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 |
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Country | United States |
City | San Diego, CA |
Period | 7/28/97 → 7/30/97 |
Keywords
- Photoluminescence
- Poly(3-hexylthiophene)
- Quantum yield
- Singlet exciton
- Solvatochromism
- Time-resolved spectroscopy
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics