Luminescent characteristics and morphology of Eu3+:YVO4 phosphor powders prepared by HCR and flux techniques
作者： S. Erdei , N. M. Rodriguez , F. W. Ainger , W. B. White , D. Ravich,ran
DOI: 10.1039/A706330J
关键词: Photoluminescence 、 Transmission electron microscopy 、 Particle size 、 Analytical chemistry 、 Stoichiometry 、 Materials science 、 Crystallinity 、 Phosphor 、 Mineralogy 、 Crystallization 、 Colloid
摘要: The emission intensities of Eu3+:YVO4 red phosphors depend significantly on the morphology and Y–V–O stoichiometry powder particles. low-temperature hydrolyzed colloid reaction (HCR) technique with different firing regimes in air crystallization from lithium metavanadate (LiVO3) flux subsequent grinding have been investigated. Powders reacted at quasi-congruent (49.3 mol% V2O5–50.7 Y2O3) composition fired temperatures up to 1200 °C exhibited higher than powders weighed stoichiometric (50 V2O5–50 ratio. After temperature (1400, 1600 °C) treatments produces better luminescent properties approaching that highly optimized industrial standard (Sylvania 2391). Only limited was obtained for crystalline prepared LiVO3 due influence mechanical grinding. Powder crystal structure were investigated by high-resolution transmission electron microscopy (TEM). small particles produced low are surprisingly well crystallized resolved lattice images. contain internal surfaces as large external which contribute degradation phosphor properties.
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