Blue-emitting Eu2+-doped CaAl2O4 phosphor thin films prepared using pulsedlaser deposition technique with post annealing

Citation
T. Kunimoto et al., Blue-emitting Eu2+-doped CaAl2O4 phosphor thin films prepared using pulsedlaser deposition technique with post annealing, JPN J A P 2, 40(10B), 2001, pp. L1126-L1128
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
10B
Year of publication
2001
Pages
L1126 - L1128
Database
ISI
SICI code
0021-4922(20011015)40:10B<L1126:BECPTF>2.0.ZU;2-U
Abstract
Blue-emitting Eu2+-doped calcium aluminate phosphor thin films were obtaine d using the pulsed laser deposition technique with post annealing. As-depos ited films were amorphous and showed weak red Eu3+ photoluminescence (PL). By annealing in reducing atmosphere (N-2/H-2:2% mixed gas) at 950 degreesC for 3 h, the film was crystallized and showed a PL emission band peaking at about 447 nm, which originated from the 4f(6)5d to 4f(7) transition of Eu2 + ion. It is considered that the deposited film consists mainly of CaAl2O4 and partly of other binary compounds of the CaO-Al2O3 system. It was determ ined that the PL intensity of Eu2+ in CaAl2O4 can be controlled by the lase r fluence, target-substrate distance and injection gas.