Synthesis and photoluminescence properties of fluorite-related (Y1−xEux)10W2O21 phosphor
作者： Tzu-Chin Chien , Chii-Shyang Hwang , Masahiro Yoshimura , Yung-Tang Nien
DOI: 10.1016/J.CERAMINT.2014.08.052
关键词:
摘要: Abstract Eu3+-doped fluorite-related yttrium–tungsten oxide Y10W2O21 (5Y2O3·2WO3) was prepared using vibrating-mill-mixed powder and solid-state reactions. The synthesis temperature investigated by thermogravimetric/differential thermal analysis X-ray diffraction. morphology of the phosphor confirmed scanning electron microscope (SEM) measurement. photoluminescence (PL) properties, including excitation emission spectra, decay curves (lifetime), stability quantum efficiency, were investigated. PL intensity found to increase with Eu3+ content up about 22.5 mol% then decrease due concentration quenching effect. There two kinds coordinating site (seven-fold coordination eight-fold coordination) Y3+ ions in structure Y10W2O21. different sites host could lead energy-level splitting 5D0→7F2 transition, resulting an peak red shift. major wavelengths, located at 612 nm 627 nm for 392 nm, attributed replacement 7 or 8 ions.
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