High efficient and low color-temperature white light-emitting diodes with Tb3Al5O12:Ce3+ phosphor

Abstract

High efficient Tb3Al5O12:Ce3+ (TAG:Ce3+) phosphors were prepared in a solid-state reaction method with various fluxes. The results show that addition of proper flux can decrease the phase-forming temperature of the TAG crystals and improve the morphology as well as enhance the photoluminescence of the phosphors greatly. High efficient and low color-temperature white light-emitting diodes (WLEDs) were fabricated with the TAG:Ce3+ phosphor. Good performances of the WLEDs indicate that a mixture of H3BO3 and LiF is an excellent flux for synthesis of TAG:0.04Ce3+ phosphor and is beneficial to the fabrication of high efficient WLEDs.