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Author Kimani, Martin M. ♦ Chen, Hongyu ♦ McMillen, Colin D. ♦ Anker, Jeffery N. ♦ Kolis, Joseph W.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ CONCENTRATION RATIO ♦ CRYSTAL GROWTH ♦ DOPED MATERIALS ♦ ENERGY TRANSFER ♦ ERBIUM COMPOUNDS ♦ ERBIUM IONS ♦ EXCITED STATES ♦ HOLMIUM IONS ♦ MONOCRYSTALS ♦ OPTOELECTRONIC DEVICES ♦ POTASSIUM CARBONATES ♦ POWDERS ♦ SOLIDS ♦ SYNTHESIS ♦ TEMPERATURE DEPENDENCE ♦ THULIUM IONS ♦ VANADATES ♦ YTTERBIUM IONS ♦ YTTRIUM COMPOUNDS
Abstract The synthesis and upconversion properties of trigonal glaserite-type K{sub 3}Y(VO{sub 4}){sub 2} co-doped with Er{sup 3+}/Yb{sup 3+}, Ho{sup 3+}/Yb{sup 3+}, or Tm{sup 3+}/Yb{sup 3+} were studied. Powder samples were synthesized by solid state reactions at 1000 °C for 48 h, while well-formed hexagonal single crystals of the same were grown hydrothermally using 10 M K{sub 2}CO{sub 3} at 560–650 °C. Infrared-to-visible upconversion by Er{sup 3+}/Yb{sup 3+}, Ho{sup 3+}/Yb{sup 3+}, or Tm{sup 3+}/Yb{sup 3+} codoped-K{sub 3}Y(VO{sub 4}){sub 2} glaserite powder and single crystals was observed, and the upconversion spectral properties were studied as a function of different Er{sup 3+}, Tm{sup 3+}, Ho{sup 3+}, and Yb{sup 3+} ion concentrations. The process is observed under 980 nm laser diode excitation and leads to strong green (552 nm) and red (659 nm) emission for Er{sup 3+}/Yb{sup 3+}, green (549 nm) and red (664 nm) emission for Ho{sup 3+}/Yb{sup 3+}, and blue (475 nm) and red (647 nm) emission for Tm{sup 3+}/Yb{sup 3+}. The main mechanism that allows for up-conversion is attributed the energy transfer among Yb{sup 3+} and the various Er{sup 3+}/Ho{sup 3+}/Tm{sup 3+} ions in excited states. These results illustrate the large potential of co-doped alkali double vanadates for photonic applications involving optoelectronics devices. - Graphical abstract: Synthesis and upconversion in vanadate glaserites. - Highlights: • K{sub 3}Y(VO{sub 4}){sub 2} codoped with Er, Tm, or Ho:Yb were synthesized via solid-state and hydrothermal routes. • Upconversion properties are investigated. • The codoped compounds revealed efficient infrared-to-visible upconversion. • The presented compounds are potential host for solid state lighting.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-03-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 226


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