Red light compensation fluorescent glass ceramic, preparation method thereof and application thereof in white light LED device

Abstract

The invention discloses red light compensation fluorescent glass ceramic, a preparation method thereof and an application of the red light compensation fluorescent glass ceramic in a white light LED device. Red borophosphate fluorescent glass capable of being effectively excited by blue light is prepared through a high-temperature melting method, and then the red borophosphate fluorescent glass and YAG:Ce<3+> yellow fluorescent powder are compounded into the red light compensation fluorescent glass ceramic through a low-temperature co-firing method. The YAG:Ce<3+> yellow fluorescent powder anda glass substrate in the fluorescent glass ceramic can be excited by blue light at the same time to emit yellow light and red light, and an LED device emitting white light is obtained by compoundingthe blue light, the yellow light and the red light. Thermal stability of the glass ceramic is effectively improved, the glass ceramic is suitable for a high-power LED device, prolongs the service lifetime of the device, increases the red light component, improves the color rendering property of the device, and avoids weakening the transparency of the material and reducing the excitation efficiencyof a chip due to the fact that red fluorescent powder is additionally added to improve the color rendering property. The variety field and application range of the light-emitting material are broadened.

Description

technical field [0001] The invention relates to a preparation method and application of a luminescent material, in particular to an inorganic light conversion material and its preparation method and application, which are applied in the technical field of inorganic solid luminescence. Background technique [0002] In recent years, LED solid-state lighting technology, known as the fourth lighting revolution, has developed rapidly. Under the green development theme of "advocating energy saving, emission reduction, and developing low-carbon economy", high-power white LED products are gradually replacing incandescent lamps, fluorescent lamps, High-pressure gas discharge lamps and other traditional lighting sources, and can be used in various fields such as mobile communications, urban landscapes, car lights, signal lights, liquid crystal displays and lighting. Currently common commercial white LEDs are made of blue GaN chips and YAG:Ce 3+ Made of yellow phosphor encapsulated t...

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Problems solved by technology

[0006] In order to solve the problems of the prior art, the object of the present invention is to overcome the deficiencies of the prior art, to provide a kind of red light compensation fluorescent glass ceramics and its preparation method and its application in white light LED devices, the red light compensation fluorescent glass of the present invention Ceramics are covered on the blue light-emitting chip to obtain white light LED devices, which can significantly improve the insufficient performance of commercial white light LEDs caused by packaging problems. The present invention uses inorganic material fluorescent glass composite materials to replace organic packaging materials. The composition of the fluorescent glass composite materials is luminescent Glass and YAG:Ce 3+ The yellow phosphor is mixed, and through a certain sintering system, the YAG:Ce 3+ Phosphor powder doped into red fluorescent glass to obtain glass ceramics

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