Holzer, W. and Penzkofer, Alfons and Schrader, S. and Grimm, B. (2005) Photo-physical and lasing characterisation of a polyparaphenylenevinylene (PPV) neat film. OPTICAL AND QUANTUM ELECTRONICS, 37 (5). pp. 475-494. ISSN 0306-8919, 1572-817X
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The wave-guided travelling-wave laser action (amplified spontaneous emission) of a neat film of poly(p-phenylenevinylene) (PPV) on a quartz glass substrate prepared by a sulfinyl precursor technique is studied. The samples are transversally pumped with picosecond excitation pulses (wavelength 347.15 nm, duration 35 ps). Lasing occurs at 550 nm. The optical constants of the neat films are determined by transmittance measurements exploiting the multiple beam interference in the transparency region. A fluorescence spectroscopic characterisation is carried out determining the fluorescence quantum distribution, fluorescence quantum yield, degree of fluorescence polarisation, and fluorescence lifetime. The emitting chromophore size (emitting singlet exciton extension) is determined by the ratio of exciton radiative lifetime to repeat-unit based radiative lifetime. The obtained size of about two repeat units is discussed in a disordered solid-state polymer model.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EXCITON-EXCITON ANNIHILATION; CONJUGATED POLYMERS; POLY(P-PHENYLENE VINYLENE); POLY(PARA-PHENYLENE VINYLENE); PRIMARY PHOTOEXCITATIONS; CONDUCTING POLYMERS; STIMULATED-EMISSION; THIN-FILMS; LASER-DYE; LUMINESCENCE; amplified spontaneous emission; emitting exciton size; fluorescence lifetime; fluorescence quantum yield; luminescent polymers; optical constants; PPV; wave-guided travelling-wave lasing |
| 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: | 18 May 2021 08:21 |
| Last Modified: | 18 May 2021 08:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/36329 |
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