Luminescence properties of solid solution Ba2Gd2–x Y x Si4O13: Eu2+ phosphor for UV white light-emitting diodes
Cation substitution is usually utilized to optimize the phosphors luminescence properties for white light-emitting diode. In this paper, a series of silicate phosphors compounds Ba2Gd2–x Y x Si4O13: Eu2+ (x = 0 to 1) have been synthesized by conventional solid-state reaction. The crystal structure of Ba2Gd2–x Y x Si4O13: Eu2+ was confirmed by the Rietveld refinements, demonstrating the sample is Ba2Gd2–x Y x Si4O13: Eu2+ solid solution. With increasing Y3+ concentration, the emission peak of Ba2Gd2–x Y x Si4O13: Eu2+ gradually shifts from 505 to 494 nm (blue-shift). The temperature-dependent photoluminescence properties of Ba2Gd2–x Y x Si4O13: Eu2+ phosphors are measured and that of the Ba2Gd2Si4O13: Eu2+ is the best in all the samples. This investigation reveals a simple linear correlation of Y3+ content and chromaticity coordinate. All the results indicate that Ba2Gd2Si4O13: Eu2+ is a more potential application for white light LEDs than other.
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Document Type: Research Article
Publication date: August 1, 2016
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