Search for: [Abstrakt = "Scheelite\-type LiEuW2O8 \(LEW\) phosphors with the optical function of color conversion from near\-UV to red were prepared by sol–gel method using a lithium acetate dehydrate, europium\(III\) nitrate pentahydrate, and tungsten\(VI\) chloride as starting materials. Viscous mixing sol was prefired at 300 °C for 120 min in air and then white powder precursor was finally annealed at 500–800 °C for 240 min in Ar. From an X\-ray diffraction analysis, all the samples are isostructural and belong to the tetragonal system of scheelite\-type. The main emission peak is 5D0 → 7F2 transitions of Eu3\+ at 615 nm, other transitions from the 5D0 → 7F1, 5D0 → 7F3 and 5D0 → 7F4 located at 570–700 nm range are weak. The characteristic emission of WO4–2 in LEW is quenched absolutely and only red\-light emission of Eu3\+ appears. Crystallinity, surface properties and red\-emission by near\-ultraviolet \(395 nm\) were improved by high\-temperature annealing."]

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