期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 633, 期 -, 页码 37-41出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.01.287
关键词
Luminescence; Phosphors; Cathodoluminescence; Optical materials
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2013-068407]
The CaWO4:xEu(3+) and CaWO4:0.08Eu(3+)/yBi(3+) phosphors were synthesized via a high-temperature solid-state reaction method. The crystal structure and luminescence properties were investigated by X-ray diffraction patterns, photoluminescence excitation and emission spectra. The results indicate that both CaWO4:xEu(3+) and CaWO4:0.08Eu(3+)/yBi(3+) phosphors can be excited by near-ultraviolet and blue lights, and a strong red emission located at 616 nm (D-5(0) -> F-7(2)) corresponding to the characteristic emission of Eu3+ ions was observed in all the samples. Furthermore, the cathodoluminescence (CL) spectra as a function of filament current and accelerating voltage were also measured. Compared to the CaWO4:0.08Eu(3+) phosphor, the CaWO4:0.08Eu(3+)/0.02Bi(3+) phosphor had a stronger CL emission intensity with good Commission International de l'Eclairage chromaticity coordinate. The CaWO4:0.08Eu(3+)/0.02Bi(3+) phosphor shows great potential for applications in white light-emitting diodes and field-emission displays as an excellent red-emitting phosphor. (C) 2015 Elsevier B.V. All rights reserved.
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