Optical excitations in poly(2,5-thienylene vinylene)

A. J. Brassett, Nicholas Colaneri, D. D C Bradley, R. A. Lawrence, R. H. Friend, H. Murata, S. Tokito, T. Tsutsui, S. Saito

Research output: Contribution to journalArticle

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Abstract

We present the results of spectroscopic studies of the electronic structure of the conjugated polymer poly(2,5-thienylene vinylene). Photoexcitation above the band gap at 1.8 eV gives rise to two transient absorption peaks at 0.44 and 1.0 eV that are associated with bipolarons that live for times of order a few milliseconds at 80 K. Photoluminescence, comparable in intensity to the Raman scattering, is found at energies above the band edge, and we assign this to a hot recombination process. We also report the Raman spectrum, and make a preliminary assignment of the main vibrational modes. Three of the four main peaks disperse as the excitation wavelength is varied. We discuss these results and compare them with those previously reported for a related polymer, poly-(p-phenylene vinylene).

Original languageEnglish (US)
Pages (from-to)10586-10594
Number of pages9
JournalPhysical Review B
Volume41
Issue number15
DOIs
StatePublished - 1990
Externally publishedYes

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Photoexcitation
Raman scattering
Raman spectra
Conjugated polymers
polymers
photoexcitation
excitation
Electronic structure
vibration mode
Photoluminescence
Polymers
Energy gap
electronic structure
photoluminescence
Wavelength
wavelengths
energy
poly(4-phenylenevinylene)

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Brassett, A. J., Colaneri, N., Bradley, D. D. C., Lawrence, R. A., Friend, R. H., Murata, H., ... Saito, S. (1990). Optical excitations in poly(2,5-thienylene vinylene). Physical Review B, 41(15), 10586-10594. https://doi.org/10.1103/PhysRevB.41.10586

Optical excitations in poly(2,5-thienylene vinylene). / Brassett, A. J.; Colaneri, Nicholas; Bradley, D. D C; Lawrence, R. A.; Friend, R. H.; Murata, H.; Tokito, S.; Tsutsui, T.; Saito, S.

In: Physical Review B, Vol. 41, No. 15, 1990, p. 10586-10594.

Research output: Contribution to journalArticle

Brassett, AJ, Colaneri, N, Bradley, DDC, Lawrence, RA, Friend, RH, Murata, H, Tokito, S, Tsutsui, T & Saito, S 1990, 'Optical excitations in poly(2,5-thienylene vinylene)', Physical Review B, vol. 41, no. 15, pp. 10586-10594. https://doi.org/10.1103/PhysRevB.41.10586
Brassett AJ, Colaneri N, Bradley DDC, Lawrence RA, Friend RH, Murata H et al. Optical excitations in poly(2,5-thienylene vinylene). Physical Review B. 1990;41(15):10586-10594. https://doi.org/10.1103/PhysRevB.41.10586
Brassett, A. J. ; Colaneri, Nicholas ; Bradley, D. D C ; Lawrence, R. A. ; Friend, R. H. ; Murata, H. ; Tokito, S. ; Tsutsui, T. ; Saito, S. / Optical excitations in poly(2,5-thienylene vinylene). In: Physical Review B. 1990 ; Vol. 41, No. 15. pp. 10586-10594.
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