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- Title
Sol--gel synthesis of RE<sup>3+</sup>-activated CaWO<sub>4</sub> phosphores.
- Authors
Žalga, Artūras; Sažinas, Rokas; Garškaitė, Edita; Kareiva, Aivaras; Bareika, Tomas; Tamulaitis, Gintautas; Juškėnas, Remigijus; Ramanauskas, Rimantas
- Abstract
A series of red-emitting phosphores containing CaWO4 : RE (RE = Tb3+, Eu3+, Sm3+) was prepared by an aqueous sol-gel method using tungsten (VI) oxide, WO3, calcium nitrate tetrahidrate, Ca(NO3)2 ⋅ 4H2O, terbium oxide, Tb4O7, europium oxide, Eu2O3, and samarium oxide, Sm2O3 as starting materials. Synthesized ceramics were characterized using infrared spectroscopy (IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) measurements. The obtained results clearly show that only CaWO4 : Eu phosphor can be effectively excited under photoexcitation at 280, 360 and 460 nm and exhibits red emission in the vicinity of 620 nm.
- Subjects
PHOSPHORS; RARE earth metals; PHOTOLUMINESCENCE; LUMINESCENCE; NONFERROUS metals
- Publication
Chemija, 2009, Vol 20, Issue 3, p169
- ISSN
0235-7216
- Publication type
Article