Luminescent glass for LED and preparation method thereof

Abstract

The invention discloses luminescent glass for an LED (Light-Emitting Diode), and a preparation method of the luminescent glass. The glass matrixes of the luminescent glass for the LED include main ingredients: SiO2, Al2O3, B2O3, CaF2, CaO, ZnO AND Na2O, the preparation method comprises the steps of: by taking rare earth ions Tb<3+>, Eu<3+>, Dy<3+>, Ce<3+> and Sm<3+> as a luminescence center, codoping or tridoping the rare earth ions into the glass matrixes, and emitting white light by matching with an ultraviolet LED chip; preparing the luminescent glass by adopting a high-temperature melting method. According to the luminescent glass, the emission spectrum, chromaticity coordinates, chromaticity temperature and the like of the luminescent glass can be regulated by changing the ingredients of the glass matrixes, the concentration of the rare earth ions and excitation wavelength, thus realizing the intelligent luminescence of the material, so as to meet the requirement of different usage environments on the luminescence performance of LED devices. The luminescent glass has excellent luminescence performance and stable physical and chemical properties, and is a novel white light emission material. The luminescent glass can be used for the LED devices, so as to solve the problems that the current LED is poor in chromaticity stability, the packaging resin is easy to age, and the like.

Description

technical field [0001] The invention relates to a luminescent material and a preparation method thereof in the fields of luminescent display, optoelectronics, and lighting engineering science and technology, and in particular to a luminescent glass for LED and a preparation method thereof. Background technique [0002] Light emitting diode (LED) is a semiconductor light emitting device that converts electrical energy into light energy. The successful development of high-brightness white LEDs has enabled better promotion and application of LEDs in the field of lighting, and at the same time brought a new revolution to lighting technology. Compared with incandescent lamps and fluorescent lamps, LED, as a new type of light source, has the characteristics of energy saving, long life, short start-up time, environmental protection, low-voltage safety, etc., and has now become a high-tech product with great development prospects and influence. White light-emitting diodes (W-LEDs) ...

AI Technical Summary

Problems solved by technology

This combination method has the following disadvantages: a) poor uniformity of luminous chromaticity; b) low color rendering index; c) high color temperature; d) epoxy resin is easy to age; e) easy to produce temperature quenching effect, Resulting in a decrease in the luminous efficiency of semiconductor chips and phosphors; f) higher costs

Although great progress has been made in the research of phosphors for LEDs, it is impossible to break through the inherent defects of powder materials, whether it is to modify the traditional phosphor system or to develop a new compound system.

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