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Sensitized thulium ultraviolet upconversion luminescence in Tm3+/Yb3+/Nd3+ triply doped nanoglass ceramics.

Identifieur interne : 000611 ( PubMed/Corpus ); précédent : 000610; suivant : 000612

Sensitized thulium ultraviolet upconversion luminescence in Tm3+/Yb3+/Nd3+ triply doped nanoglass ceramics.

Auteurs : Daqin Chen ; Yuansheng Wang ; Yunlong Yu ; Feng Liu ; Ping Huang

Source :

RBID : pubmed:17975599

Abstract

Intense four- and five-photon ultraviolet upconversion processes through sensitization of Tm3+ ions in transparent SiO2-Al2O3-NaF-YF3 glass ceramics triply doped with Tm3+/Yb3+/Nd3+ under 796 nm excitation were investigated. Judd-Ofelt analyses evidenced the incorporation of rare-earth ions into the precipitated beta-YF3 nanocrystals. In contrast with the triply doped one, no ultraviolet upconversion luminescence was observed in the Tm3+/Nd3+ codoped glass ceramic, indicating that Yb3+ acts as bridging ions to enhance the energy transfer efficiency between Nd3+ and Tm3+. Based on the pumping power dependence of luminescence, upconversion mechanisms were proposed.

PubMed: 17975599

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pubmed:17975599

Le document en format XML

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<div type="abstract" xml:lang="en">Intense four- and five-photon ultraviolet upconversion processes through sensitization of Tm3+ ions in transparent SiO2-Al2O3-NaF-YF3 glass ceramics triply doped with Tm3+/Yb3+/Nd3+ under 796 nm excitation were investigated. Judd-Ofelt analyses evidenced the incorporation of rare-earth ions into the precipitated beta-YF3 nanocrystals. In contrast with the triply doped one, no ultraviolet upconversion luminescence was observed in the Tm3+/Nd3+ codoped glass ceramic, indicating that Yb3+ acts as bridging ions to enhance the energy transfer efficiency between Nd3+ and Tm3+. Based on the pumping power dependence of luminescence, upconversion mechanisms were proposed.</div>
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