Abstract
The luminescence of the vanadate garnet, , activated with trivalent europium is evaluated and discussed as a potential ultraviolet light-emitting diode (UV-LED) phosphor. This single phosphor is capable of converting the ultraviolet emission of a UV-LED into white light with good luminosity and color-rendering index. We have evaluated the luminescence of this material at elevated temperatures, because the junction temperatures of typical LEDs can be greater than . There is significant thermal quenching of this phosphor and emission color shift at . This is attributed to energy migration and transfer to nonradiative traps and within the host lattice. These implications on the use of this phosphor in UV-LED based light sources is also discussed.
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