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Titolo:
The dynamics of gain-narrowing in a ladder-type pi-conjugated polymer
Autore:
Wegmann, G; Schweitzer, B; Hertel, D; Giessen, H; Oestreich, M; Scherf, U; Mullen, K; Mahrt, RF;
Indirizzi:
Univ Marburg, Inst Phys Chem, Fachbereich Phys, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 eich Phys, D-35032 Marburg, Germany Max Planck Inst Polymerforsch, D-55128 Mainz, Germany Max Planck Inst Polymerforsch Mainz Germany D-55128 55128 Mainz, Germany Univ Marburg, Wissensch Zentrum Mat Wissensch, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 Wissensch, D-35032 Marburg, Germany
Titolo Testata:
CHEMICAL PHYSICS LETTERS
fascicolo: 5-6, volume: 312, anno: 1999,
pagine: 376 - 384
SICI:
0009-2614(19991029)312:5-6<376:TDOGIA>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
AMPLIFIED SPONTANEOUS EMISSION; STIMULATED-EMISSION; LASER-EMISSION; THIN-FILMS; CONDUCTING POLYMERS; MONTE-CARLO; RELAXATION; MECHANISM; POLY(PHENYLENEVINYLENE); EXCITATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Mahrt, RF Univ Marburg, Inst Phys Chem, Fachbereich Phys, Renthof 5, D-35032 Marburg, Germany Univ Marburg Renthof 5 Marburg Germany D-35032 Marburg, Germany
Citazione:
G. Wegmann et al., "The dynamics of gain-narrowing in a ladder-type pi-conjugated polymer", CHEM P LETT, 312(5-6), 1999, pp. 376-384

Abstract

Amplified spontaneous emission (ASE) indicated by photoluminescence spectral-narrowing is observed from a ladder-type conjugated polymer at high excitation densities. The narrowed emission shows a distinct blue-shift with respect to the photoluminescence emitted at lower densities. The line-narrowing is examined in detail using picosecond luminescence spectroscopy in conjunction with femtosecond pump-probe spectroscopy. The experiments give insight into the fundamental processes that lend to optical gain in conjugated polymers. Our results provide conclusive evidence that gain-narrowing occurs simultaneously with an energetic relaxation of localized excitations. Thespectral properties of the ASE are closely linked to the dynamics of the excited states. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 26/11/20 alle ore 20:31:09