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Titolo:
EFFECTIVE STIMULATED-EMISSION AND EXCITED-STATE ABSORPTION CROSS-SECTION SPECTRA OF NYLENEVINYLENE-CO-2,5-DIOCTOXY-P-PHENYLENEVINYLEE) AND T,T'-DIDECYLOXY-II-DISTYRYLBENZENE
Autore:
HOLZER W; PENZKOFER A; GONG SH; BRADLEY DDC; LONG X; BLEYER A;
Indirizzi:
UNIV REGENSBURG,INST EXPT & ANGEW PHYS 2 D-93040 REGENSBURG GERMANY UNIV REGENSBURG,INST EXPT & ANGEW PHYS 2 D-93040 REGENSBURG GERMANY UNIV SHEFFIELD,DEPT PHYS,ELECT & PHOTON MOL MAT GRP SHEFFIELD S3 7RH S YORKSHIRE ENGLAND UNIV SHEFFIELD,CTR MOL MAT SHEFFIELD S3 7RH S YORKSHIRE ENGLAND
Titolo Testata:
Chemical physics
fascicolo: 2-3, volume: 224, anno: 1997,
pagine: 315 - 326
SICI:
0301-0104(1997)224:2-3<315:ESAEAC>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
SITE-SELECTIVE FLUORESCENCE; TIME-RESOLVED LUMINESCENCE; CONJUGATED POLYMERS; ELECTROLUMINESCENT POLYMERS; LASER-DYE; EOSIN-Y; SPECTROSCOPY; EFFICIENCY; PHOTOEXCITATIONS; WAVELENGTH;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
71
Recensione:
Indirizzi per estratti:
Citazione:
W. Holzer et al., "EFFECTIVE STIMULATED-EMISSION AND EXCITED-STATE ABSORPTION CROSS-SECTION SPECTRA OF NYLENEVINYLENE-CO-2,5-DIOCTOXY-P-PHENYLENEVINYLEE) AND T,T'-DIDECYLOXY-II-DISTYRYLBENZENE", Chemical physics, 224(2-3), 1997, pp. 315-326

Abstract

Effective stimulated emission cross-section spectra, sigma(em,eff)(gamma), stimulated emission cross-section spectra, sigma(em)(lambda), and excited-state absorption cross-section spectra, sigma(ex)(lambda) = sigma(em)(lambda) - sigma(em,eff)(lambda), are determined in the fluorescence region for the conjugated polymer ylenevinylene-co-2,5-dioctoxy-p-phenylenevinylene) in tetrahydrofuran, xylene, toluene, and for the model molecule t,t'-(didecyloxy)-II-distyrylbenzene. For the conjugated polymer sigma(em,eff)(lambda) is found to be small compared to sigma(em)(lambda) indicating that sigma(ex)(lambda) and sigma(em)(lambda)are of similar strength and spectral shape, while for the model compound sigma(ex)(lambda) is small compared to sigma(em)(lambda). In the polymer the laser excitation to the broad S-1 absorption band leads to the formation of discrete lattice relaxed exciton conformations extending on the average over four monomer units which are responsible for upper-to-lower-state stimulated emission and lower-to-upper-state (excited-state) absorption. (C) 1997 Elsevier Science B.V.

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Documento generato il 01/12/20 alle ore 13:36:04