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Dai, W. B. (2014) Investigation of the luminescent properties of Ce3+ doped and Ce3+/Mn2+ co-doped CaAl2Si2O8 phosphors. RSC Adv. 4 11206–11215. 
Added by: Florent Boucher (2016-04-29 09:26:45)
Type de référence: Article
DOI: 10.1039/c3ra47156j
Numéro d'identification (ISBN etc.): 2046-2069
Clé BibTeX: Dai2014c
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Catégories: MIOPS
Mots-clés: ba, emission, energy-transfer, eu2+, leds, light-emitting-diodes, mal2si2o8 m, mn2+, sr, white-light
Créateurs: Dai
Collection: RSC Adv.
Consultations : 11/381
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
A series of Ce3+ doped and Ce3+/Mn2+ co-doped CaAl2Si2O8 phosphors have been synthesized in a reducing atmosphere (Ar/H-2) via a solid-state route and their photoluminescent properties have been investigated at room temperature. For the CaAl2Si2O8: Ce3+ phosphor, a broad emission band at 430 nm is observed in addition to characteristic bands of Ce3+ peaking at 334 nm and 356 nm. The extra band is assigned to the presence of cationic vacancies naturally created to counterbalance the substitution of Ce3+ ions for Ca2+ alkaline-earth species. Its intensity can be significantly reduced when Ca2+ cations are replaced by the reaction 2Ca(2+) -{>} Ce-Ca + K-Ca'; i.e. when the amount of alkaline earth vacancies induced by the presence of Ce3+ cations is minimized. Moreover, the co-doping Ce3+/Mn2+ goes along with the appearance of energy transfers that make possible fine tuning of the CIE(x, y) parameters from blue to warm white and even yellow.
Added by: Florent Boucher  
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