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Effect of Tm3+ Concentration and Temperature on Blue and NIR Upconversion Luminescence in Tm3+/Yb3+ Co-Doped NaY(WO4)2 Microstructures

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Tm3+/Yb3+ codoped NaY(WO4)2 microstructures with various Tm3+ concentrations and 10 mol% Yb3+ concentration were prepared by a microwave-assisted hydrothermal method, and their upconversion luminescence (UCL) was investigated. Under excitation at 980 nm, Tm3+/Yb3+ codoped NaY(WO4)2 exhibited strong blue and near infrared (NIR) emissions, respectively, corresponding to 1G43H6 and 3H43H6 transitions, with weak red emission due to the 1G43H4 transition. The optimum doping concentrations of Tm3+ for the highest blue and NIR UCL were investigated, and it was found that the optimal concentrations for blue and NIR emissions were 0.5 mol% and 1.5 mol%, respectively. In addition, an analysis of temperature dependent blue and NIR UCL in both the samples with low and high Tm3+ concentrations, respectively, was undertaken. The results implied that the sample with low Tm3+ concentration displayed more obvious effect on the thermal quenching of 1G4 level.
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Document Type: Research Article

Publication date: January 1, 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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