A rare earth-doped luminescent glass and its preparation method

Abstract

The invention discloses rare earth doped luminescent glass, and a preparation method thereof. Main ingredients of glass matrix of the rare earth doped luminescent glass are B2O3, Al2O3, ZnO, CaF2, CaO and Na2O; and rare earth ions Tb<3+>, Sm<3+>, Eu<3+>, Dy<3+>, and Tm<3+> are luminescence centers. According to the preparation method, emitting of visible light is realized via single-doping, double-doping, or three-doping of the rare earth ions with glass matrix, and combination with ultraviolet LED chips; and the rare earth doped luminescent glass is prepared via melt cooling. Excitation of the rare earth doped luminescent glass can be realized by 350-400nm ultraviolet light, and emitting of visible light is realized; emission spectrum, chromaticity coordinate, and color temperature of the rare earth doped luminescent glass can be adjusted by changing the ingredients of the glass matrix, concentration of the rare earth ions, and excitation wavelength so as to realize material intelligent luminescence, and satisfy requirements of different using environments on luminescence performance; the rare earth doped luminescent glass possesses excellent luminescence performance, is a novel light conversion material with high application value, and can be used for LED luminescent devices so as to solve problems of existing LED luminescent devices that LED color stability is poor, and aging of encapsulating resin is easily caused.

Description

technical field [0001] The invention relates to a luminescent material in the fields of luminescent display and lighting engineering and a preparation method thereof, in particular to a rare earth-doped luminescent glass and a preparation method thereof. Background technique [0002] Lighting is an important part of today's society's energy consumption. The mainstream products of traditional lighting are incandescent lamps and fluorescent lamps. The common disadvantage of these two kinds of lamps is that only a small part of electric energy is converted into visible light, and other electric energy is converted into infrared rays and heat, with low light efficiency and short life, and fluorescent lamps contain mercury, which is easy to pollute the environment. Light emitting diode (Light emitting diode, LED) is a semiconductor light-emitting device that converts electrical energy into light energy. Its light radiation is mainly concentrated in the visible light region, whic...

AI Technical Summary

Problems solved by technology

This LED device has the following disadvantages: the uniformity of the luminous color is not easy to control; the color rendering index is low; the epoxy resin used for packaging is easy to age; decline; relatively high manufacturing costs

At present, great progress has been made in the research of phosphors for LEDs. However, it is impossible to overcome the inherent defects of powder materials, whether it is optimizing the traditional phosphor system or developing a new phosphor chemical composition.

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