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A kind of yag:mn red phosphor and its preparation method and application

A red phosphor, red light technology, applied in the field of YAG:Mn red phosphor and its preparation, can solve the problems of high cost, low chemical stability, affecting the overall performance of white light LED devices, etc., and achieves low cost and simple preparation process. , the effect of good thermal and chemical stability

Inactive Publication Date: 2017-09-05
HANGZHOU DIANZI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At this stage, sulfide red phosphor is relatively cheap, but its chemical stability is low, and the Ni / Ag electrode of the LED chip is easy to react with sulfide to form a black mixture, which affects the overall performance of white LED devices.
Nitride red powder has strict requirements on preparation conditions, and often needs to be synthesized under high temperature and high pressure atmosphere conditions, and high-purity chemical reagents are required, resulting in a very high cost

Method used

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  • A kind of yag:mn red phosphor and its preparation method and application
  • A kind of yag:mn red phosphor and its preparation method and application
  • A kind of yag:mn red phosphor and its preparation method and application

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Experimental program
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Effect test

Embodiment 2

[0038] Analytical pure Y 2 o 3 、Al 2 o 3 , MgCO 3 、H 3 BO 3 , MnO press Y 3 al 4.5 o 12 :0.1Mn 4+ / 0.4Mg 2+ Add 2wt% H after accurate weighing 3 BO 3 Put it in an agate mortar, mix and grind evenly in the agate mortar, put it in a corundum crucible, put it in a high-temperature furnace, heat it to 1500°C, and keep it warm for 4 hours to sinter it into a block. Grind the obtained bulk phosphor evenly in an agate mortar to form a micron-sized powder.

[0039] XRD data shows that the prepared YAG of the present invention: Mn fluorescent powder is cubic structure pure phase (such as figure 1 shown), the addition of co-doped ions has no effect on the structure of YAG. Excitation and emission spectra at room temperature were measured with FS5 fluorescence spectrometer. monitoring Mn 4+ On the excitation spectrum of ion 673 nm emission, the detection corresponds to the Mn 4+ : 4 A 2 → 4 T 1 , 4 T 2 Excitation bands in the transitional ultraviolet (250-430 nm) a...

Embodiment 3

[0041] Analytical pure Y 2 o 3 、Al 2 o 3 , MgCO 3 、H 3 BO 3 , MnO press Y 3 al 4.1 o 12 :0.1Mn 4+ / 0.8Mg 2+ Add 2wt% H after accurate weighing 3 BO 3 Place in different agate mortars, mix and grind evenly in the agate mortar, put them in different corundum crucibles, put them in a high-temperature furnace, heat them to 1500°C and keep them warm for 4 hours to sinter them into blocks. Grind the obtained bulk phosphor evenly in an agate mortar to form a micron-sized powder. Measure the emission spectrum at room temperature with FS5 fluorescence spectrometer and find that 0.8Mg 2+ The co-doped YAG:Mn phosphor has 11 times higher luminous intensity than the YAG:Mn without doping other ions.

Embodiment 4

[0043] Analytical pure Y 2 o 3 、Al 2 o 3 , CaCO 3 、H 3 BO 3 , MnO press Y 2.6 al 4.9 o 12 :0.1Mn 4+ / 0.4Ca 2+ Add 4wt% H after accurate weighing 3 BO 3 Put it in different agate mortars, mix and grind evenly in the agate mortar, put it in different corundum crucibles, put it in a high-temperature furnace, heat it to 1400°C, and keep it warm for 5 hours to sinter it into a block. Grind the obtained bulk phosphor evenly in an agate mortar to form a micron-sized powder. Measure the emission spectrum of the sample at room temperature with a FS5 fluorescence spectrometer, and find that 0.4Ca 2+ The co-doped YAG: Mn phosphor has 9 times higher luminous intensity than the YAG: Mn without doping other ions.

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Abstract

The present invention provides a YAG:Mn red phosphor, a preparation method and applications thereof. According to the present invention, the developed red phosphor can be effectively used in white light LED; the chemical general formula of the phosphor is RE(3-y)Al(5-x-z)O12:xMn<4+> / yCa<2+> / zME, wherein RE is one or a plurality of materials selected from Y<3+>, Lu<3+> and Gd<3+>, ME is one or two selected from Mg<2+> and Ge<4+>, x is 0.001-0.2, y is 0-0.8, z is 0-0.8, and y and z are not simultaneously 0; and the ions such as Mg<2+>, Ca<2+> and Ge<4+> are co-doped as the valence compensation ions so as to increase the luminous efficiency.

Description

technical field [0001] The invention belongs to the field of solid luminescent materials, and in particular relates to a YAG:Mn red fluorescent powder as well as its preparation method and application. Background technique [0002] In recent years, solid-state white light-emitting diode (LED) lighting has attracted widespread attention. It has advantages that traditional incandescent and fluorescent lamps do not have, such as: high luminous efficiency, long service life, energy saving and excellent environmental friendliness, etc. Due to its excellent performance, LED lights have been widely used in many fields such as household lighting, commercial lighting, automobiles, and communications. At this stage, there are mainly two preparation technologies for white light LEDs: one method is to combine a single red, green and blue LED to emit white light; the second method is to combine InGaN blue light chips with YAG: Ce yellow phosphor to emit white light. However, YAG:Ce pho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80H01L33/50
CPCC09K11/7706H01L33/502Y02B20/00
Inventor 陈大钦周洋周向志王伟师伟堂
Owner HANGZHOU DIANZI UNIV
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