Energy-dependent branching between fluorescence and singlet exciton dissociation in sexithienyl thin films

Autor:	R. Danieli, Roberto Zamboni, O. Dippel, Heinz Bässler, V. Brandl, Carlo Taliani
Rok vydání:	1993
Předmět:	Molecular solid Absorption edge Absorption spectroscopy Chemistry Exciton General Physics and Astronomy Singlet state Physical and Theoretical Chemistry Photochemistry Molecular physics Fluorescence Excitation Dissociation (chemistry)
Zdroj:	Chemical Physics Letters. 216:418-423
ISSN:	0009-2614
Popis:	The fluorescence yield of thin films of sexithienyl drops rapidly above the S1←S0 absorption edge while the yield of photocarrier generation increases simultaneously. This unusual behavior of a molecular solid is interpreted in terms of an energy-dependent branching between fluorescence and dissociation of a singlet excitation into a weakly bound electron—hole pair. This is shown to be a characteristic feature of a disordered system in which the energy levels of both neutral and charged excitations are subject to inhomogeneous broadening. In T6 the latter arises from torsional displacement of the thienylene moities.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::11c37dc6537cc2331fb50f885ba9b146 https://doi.org/10.1016/0009-2614(93)90120-p Zobrazit plný text záznamu