Rubano, Andrea, Scotti Di Uccio, Umberto and Marrucci, Lorenzo (2009) Blue luminescence of SrTiO3 under intense optical excitation. [Pubblicazione in rivista scientifica]
Full text not available from this repository.Item Type: | Pubblicazione in rivista scientifica |
---|---|
Resource language: | English |
Title: | Blue luminescence of SrTiO3 under intense optical excitation |
Creators: | Creators Email Rubano, Andrea UNSPECIFIED Scotti Di Uccio, Umberto UNSPECIFIED Marrucci, Lorenzo UNSPECIFIED |
Autore/i: | A. Rubano, D. Paparo, F. Miletto Granozio, U. Scotti di Uccio, L. Marrucci |
Date: | 2009 |
Number of Pages: | 11 |
Department: | Scienze fisiche |
Identification Number: | 10.1063/1.3256140 |
Journal or Publication Title: | JOURNAL OF APPLIED PHYSICS |
Date: | 2009 |
Volume: | 106 |
Page Range: | 103515-1-103515-11 |
Number of Pages: | 11 |
Keywords: | blue luminescence, time-resolved spectroscopy, electronic relaxations, perovksite oxides, crystal defects, oxygen vacancies |
Identification Number: | 10.1063/1.3256140 |
Date Deposited: | 21 Oct 2010 06:57 |
Last Modified: | 30 Apr 2014 19:43 |
URI: | http://www.fedoa.unina.it/id/eprint/7508 |
Collection description
The blue-green photoluminescence emitted by pure and electron-doped strontium titanate under intense pulsed near-ultraviolet excitation is studied experimentally as a function of excitation intensity and temperature. Both emission spectra and time-resolved decays of the emission are measured and analyzed in the framework of simple phenomenological models. We find an interesting blue-to-green transition occurring for increasing temperatures in pure samples, which is absent in doped materials. The luminescence yield and decay rate measured as a function of temperature can be modeled well as standard activated behaviors. The leading electron-hole recombination process taking place in the initial decay is established to be second order, or bimolecular, in contrast to recent reports favoring a third-order interpretation as an Auger process. The temporal decay of the luminescence can be described well by a model based on two interacting populations of excitations, respectively identified with interacting defect-trapped possibly forming excitons and mobile charges. Finally, from the measured doping and sample dependence of the luminescence yield, we conclude that the radiative centers responsible for the luminescence are probably intrinsic structural defects other than bulk oxygen vacancies.
Downloads
Downloads per month over past year
Actions (login required)
![]() |
View Item |