Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 672, Issue -, Pages 1-6Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.02.157
Keywords
Tunable upconversion; Yb3+, Tm3+ and Ho3+ tri-doped Re2TeO6; White light
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Funding
- National Natural Science Foundation of China [51302228]
- Project for the Youth Talent of Chongqing [CSTC2014KJRC-QNRC0055]
- Fundamental Research Funds for the Central Universities of Southwest University [XDJK2013C089, XDJK2015B019]
- Southwest University [SWU114098]
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Phosphors of Re2TeO6 (Re = La, Gd, and Lu) tri-doped with Yb3+, Tm3+ and Ho3+ ions have been synthesized by the solid state reactions. The crystal structures have been characterized by powder XRD measurement. The SEM images have shown the average particle sizes of the phosphors can be controlled within 1 micron. Upconversion luminescences were investigated under the excitation of 976 nm laser diode. The upconversion processes were explained based on the pump dependence of upconversion emission intensity. The light color was studied in the framework of 1931 CIE diagram. The three systems have shown nice tunabilities by changing the pump intensity and rare earth ions concentration. By properly adjusting the concentration of Tm3+ ions white upconversion luminescence can be realized in all the three tri-doped systems. Results indicated that these phosphors have potential applications in the upconversion based white lighting and optoelectronic devices. (C) 2016 Elsevier B.V. All rights reserved.
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