SiO2-YAG:Ce3+ GLASS PHOSPHOR PREPARED FOR WHITE LED PACKAGING

The vinyltriethoxysilane (VTES) modified SiO2-YAG:Ce3+ glass phosphor was successfully prepared by sol-gel method. The glass phosphor was characterized by X-ray diffraction(XRD), photoluminescence spectra(PL), photoluminescence excitation spectra(PLE) and infrared absorption (IR) spectra. It showed that the glass phosphor has a main Y3Al5O12 phase, and the yellow emission around 550 nm in wavelength was observed under the excitement of 460 nm. A white light emitting diode (WLED) packaged by this SiO2-YAG:Ce3+ glass phosphor with a 460 nm-emitting blue chip showed better performance in color render index (CRI), luminous flux and luminous efficiency than which packaged by the traditional way at the same condition. The results indicated that the organic modified SiO2-YAG:Ce3+ glass phosphor is a potential material for WLED packaging application.