Benvenuti nell'Anagrafe della Ricerca d'Ateneo
La valutazione delle attività di ricerca che si svolgono nelle università ha assunto un'importanza rilevante sia per l'intero sistema universitario sia all'interno di ogni singolo ateneo. Roma Tre si è quindi dotata di idonei strumenti informativi in grado di supportare al meglio le azioni di monitoraggio e di valutazione delle attività di ricerca svolte nei propri dipartimentied ha realizzato una Anagrafe della Ricerca di Ateneo.
EnglishPhotoluminescence data are presented for diamond films grown by different techniques (hot-filament CVD, microwave PECVD, DC arc-jet) and excited in the range 450-650nm by different laser sources. In large-grain textured samples, sharp vibronic structures, related to nitrogen and silicon impurity centers, are clearly observed, whereas in small-grain, randomly oriented films spectra are dominated by broad luminescence bands, whose maxima move with excitation energy. In the former case a careful deconvolution of emission spectra allows us to obtain vibronic parameters of the centers and their fine structure details, while excitation spectra give the energy location of higher electronic excited states. On the other hand, the line-shape and the excitation-dependent shift of broad luminescence bands are related to a continuous distribution of gap states, able to trap photogenerated electron-hole pairs. (C) 1998 Elsevier Science S.A.
Rossi MC, Salvatori S, Galluzzi F, Somma Anfosso F, & Montereali RM (1998). Diamond photoluminescence spectra: dependence on excitation energy and microstructure. DIAMOND AND RELATED MATERIALS, 7(2-5), 255-260.
| Titolo: | Diamond photoluminescence spectra: dependence on excitation energy and microstructure |
| Autori: | |
| Data di pubblicazione: | 1998 |
| Rivista: | |
| Citazione: | Rossi MC, Salvatori S, Galluzzi F, Somma Anfosso F, & Montereali RM (1998). Diamond photoluminescence spectra: dependence on excitation energy and microstructure. DIAMOND AND RELATED MATERIALS, 7(2-5), 255-260. |
| Abstract: | Photoluminescence data are presented for diamond films grown by different techniques (hot-filament CVD, microwave PECVD, DC arc-jet) and excited in the range 450-650nm by different laser sources. In large-grain textured samples, sharp vibronic structures, related to nitrogen and silicon impurity centers, are clearly observed, whereas in small-grain, randomly oriented films spectra are dominated by broad luminescence bands, whose maxima move with excitation energy. In the former case a careful deconvolution of emission spectra allows us to obtain vibronic parameters of the centers and their fine structure details, while excitation spectra give the energy location of higher electronic excited states. On the other hand, the line-shape and the excitation-dependent shift of broad luminescence bands are related to a continuous distribution of gap states, able to trap photogenerated electron-hole pairs. (C) 1998 Elsevier Science S.A. |
| Handle: | http://hdl.handle.net/11590/114666 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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