Luminescence properties of Y2WO6：Yb^3＋/Er^3＋ with enhanced redemission via upconversion

The Er^3＋/yb^3＋ co-doped Y2WO6 phosphors were prepared via high temperature solid method for thefirst time. The structure was investigated with X-ray diffraction （XRD）. The crystal morphology wasobserved through scanning electron microscopy （SEM）. Under the excitation of 980 nm diode laser,visible u...

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Bibliographic Details
Published in中国稀土学报：英文版 Vol. 35; no. 11; pp. 1065 - 1070
Main Author Xuedong Gao;Denghui Xu;Jiangnan Du;Zaifa Yang;Jiayue Sun
Format Journal Article
LanguageEnglish
Published 2017
Subjects
Luminescence
Rare-earthY2WO6
Up-conversion
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Summary:The Er^3＋/yb^3＋ co-doped Y2WO6 phosphors were prepared via high temperature solid method for thefirst time. The structure was investigated with X-ray diffraction （XRD）. The crystal morphology wasobserved through scanning electron microscopy （SEM）. Under the excitation of 980 nm diode laser,visible up-conversion （UC） emissions were observed in green and red regions. The luminescence studyreveals strong 4S312 tO 411512 transition at 545 nm and strong 4F912 to 4115/2 transition at 657 nm. Therelative intensities ratios of red （510-580 nm） to green （640-690 nm） emissions （RRjc） reduce when thesamples co-doped with Yb3＋ ions. The dependence of emission intensity on the pump power indicatethat visible UC emissions are governed by two photons, meanwhile three photons process is alsoinvolved. For more details, the discussion is made in the energy level diagrams.
Bibliography:11-2788/TF
ISSN:1002-0721
2509-4963