Host sensitized NIR emission in rare-earth doped NaY(MoO4)2 phosphors

Intense near-infrared emitting phosphors NaY(MoO4)2 activated with Ln3+ (Ln = Nd and Yb) were synthesized by a conventional solid state reaction and characterized with X-ray diffraction, photoluminescence emission and excitation spectra. Sensitization of Ln3+ (Ln = Nd and Yb) from the host with diff...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 732; pp. 64 - 69
Main Authors Tawalare, P.K., Bhatkar, V.B., Talewar, R.A., Joshi, C.P., Moharil, S.V.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 25.01.2018
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Summary:Intense near-infrared emitting phosphors NaY(MoO4)2 activated with Ln3+ (Ln = Nd and Yb) were synthesized by a conventional solid state reaction and characterized with X-ray diffraction, photoluminescence emission and excitation spectra. Sensitization of Ln3+ (Ln = Nd and Yb) from the host with different doping concentration of Ln3+ were investigated. Under UV excitation, intense and characteristic emission of Nd3+ at 897, 1064 and 1347 nm and Yb3+ emission 997 nm, sensitized by MoO4−2 group were observed. The host excitation is in the UV region of 250–380 nm. An efficient energy transfer from MoO4−2→Nd3+, MoO4−2→Yb3+ and MoO4−2→Nd3+→Yb3+ were observed. The two step energy transfer process from MoO4−2→Nd3+→Yb3+ is also discussed. The excellent luminescence properties of the Nd3+ and Yb3+ single doped and Nd3+–Yb3+ codoped NaY(MoO4)2 phosphor indicates its potential application in modern lasers and photonic technology. [Display omitted] •NaY(MoO4)2:Nd3+, Yb3+ synthesized by conventional solid state reaction.•Intense Nd3+ and Yb3+ NIR emissions observed.•Sensitization from the MoO4−2.•The possible energy transfer mechanisms discussed.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.10.169