Upconversion luminescence of Ba(MoO4)h(WO4)1?h:Yb3+/Er3+ nanocrystals synthesized through hydrothermal method |
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| Affiliation: | 1. Instituto de Física, Universidade Federal de Uberlândia. CP 593, 38400-902 Uberlândia, MG, Brazil;2. Universidade de São Paulo-USP, Av. Trabalhador São Carlense, CEP13560-970 São Carlos, SP, Brazil;3. CIMAP – UMR 6252 CEA-CNRS-ENSICAEN-Université de Caen, 6 boulevard du Maréchal Juin, 14050 CAEN Cedex 4, France;1. Institute of Physics, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;2. Belarusian State University of Informatics and Radioelectronics, P. Browki Str. 6, 220013 Minsk, Belarus;1. Institute of Photonics, University of Eastern Finland, Joensuu 80101, Finland;2. Institute of Mechanics, Russian Academy of Sciences, Izhevsk 426067, Russia;3. Institute of Biophysics, Russian Academy of Sciences, Krasnoyarsk 660036, Russia |
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| Abstract: | A series of Yb3+/Er3+ co-doped Ba(MoO4)h(WO4)1?h upconversion nanocrystals (UCNCs) were prepared via hydrothermal method. The effects of different concentration ratios of Yb3+/Er3+ and Mo4O2?/WO42? on the upconversion luminescence were investigated, and the optimum doping concentrations of Yb3+ and Er3+ in the Ba(MoO4)0.5(WO4)0.5 host were found to be 3 mol% and 1 mol%, respectively. Structure of Ba(MoO4)0.5(WO4)0.5:0.03Yb3+/0.01Er3+ was identified as the tetragonal in the X-ray diffraction (XRD) results and the particle size observed in the scanning electron microscope (SEM) was about 40 nm. Under excitation of 980 nm semiconductor laser, three emission bands centered at 528, 550 and 660 nm, originating from 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 transitions of Er3+ ion, respectively, were observed for Ba(MoO4)0.5(WO4)0.5:0.03Yb3+/0.01Er3+. The pump power dependence research suggested that these bands arise due to two-photon absorption. The variation of CIE coordinate at different excitation powers was observed. |
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| Keywords: | Up-conversion Hydrothermal method |
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