Holzer, W. and Penzkofer, Alfons and Gong, S. H. and Blau, W. J. and Davey, A. P. (1998) Effective stimulated emission and excited-state absorption cross-section spectra of para-phenylene-ethynylene polymers. OPTICAL AND QUANTUM ELECTRONICS, 30 (1). pp. 1-14. ISSN 0306-8919, 1572-817X
Full text not available from this repository.Abstract
The effective stimulated emission cross-section spectra, sigma(em,eff)(lambda), the stimulated emission cross-section spectra, sigma(em)(lambda), and the excited-state absorption cross-section spectra, sigma(ex)(lambda) = sigma(em)(lambda) - sigma(em,eff)(lambda), of the conjugated polymers poly(2,5-dioctadecyloxy-paraphenylene-ethynylene-co-2,5-thienyl) (OPT) and poly(2.5-dioctadecyloxy-paraphenylene-ethynylene-co-2,5-pyridinyl) (OPP) in tetrahydrofuran are determined in the fluorescence region. sigma(em,eff)(lambda) determined by a fluorescence amplification technique is found to be small compared to sigma(em,eff)(lambda) indicating that sigma(ex)(lambda) is nearly as large as sigma(em)(lambda). The laser excitation to the wide inhomogeneously broadened S-1 -absorption band leads to the formation of spectrally structured inhomogeneously broadened lattice relaxed exciton conformations extending on average over two monomer units which are thought to be responsible for upper-to-lower-state stimulated emission and lower-to-upper-state (excited-state) absorption.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONJUGATED POLYMERS; LASER-DYE; EOSIN-Y; EFFICIENCY; FILMS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Alfons Penzkofer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Mar 2023 09:47 |
| Last Modified: | 01 Mar 2023 09:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50280 |
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