Rubano, Andrea and Scotti Di Uccio, Umberto and Marrucci, Lorenzo (2009) Photoluminescence dynamics in strontium titanate. [Pubblicazione in rivista scientifica]

Il contenuto (Full text) non è disponibile all'interno di questo archivio. [error in script] [error in script]
Tipologia del documento: Pubblicazione in rivista scientifica
Lingua: English
Titolo: Photoluminescence dynamics in strontium titanate
Rubano, Andrea[non definito]
Scotti Di Uccio, Umberto[non definito]
Marrucci, Lorenzo[non definito]
Autore/i: A. Rubano, F. Ciccullo, D. Paparo, F. Miletto Granozio, U. Scotti di Uccio, L. Marrucci
Data: 2009
Numero di pagine: 4
Dipartimento: Scienze fisiche
Numero identificativo: 10.1016/j.jlumin.2009.02.037
Titolo del periodico: JOURNAL OF LUMINESCENCE
Data: 2009
Volume: 129
Intervallo di pagine: pp. 1923-1926
Numero di pagine: 4
Parole chiave: Photoluminescence, strontium titanate, electronic relaxation
Numero identificativo: 10.1016/j.jlumin.2009.02.037
Depositato il: 21 Ott 2010 06:57
Ultima modifica: 30 Apr 2014 19:43


The recombination dynamics of electron-hole pairs of pure and n-doped strontium titanate (STO) bulk samples after an intense UV laser-pulse excitation has been investigated by collecting and analysing the frequency- and time-resolved photoluminescence (PL) signal, as a function of the sample temperature. The observed PL decay is in the nanosecond time-scale and it shows a peculiar mixed kinetics. In particular, two decay channels are clearly singled-out: the faster one has a decay-time that is markedly dependent on the photo-excited carrier density and it is well described as a bimolecular recombination process, while the second slower channel shows an excitation-independent rate and follows an unimolecular law. The PL spectra show a considerable variation with temperature, with a previously unreported, pronounced difference between pure and doped samples emerging at high temperatures. A first discussion of the possible underlying mechanisms is attempted.

Actions (login required)

Modifica documento Modifica documento