Fluorescent material and white light emitting device

A technology for fluorescent materials and light-emitting devices, applied in the field of fluorescent materials, can solve the problems of easy thermal exhaustion of fluorescent powders and lack of high thermal stability, and achieve the effects of simple preparation process, high thermal stability, and high luminous intensity

Inactive Publication Date: 2014-10-29
CHINA GLAZE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The phosphor used in it is prone to heat exhaustion at high temperature and does not have the effect of high thermal stability

Method used

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  • Fluorescent material and white light emitting device
  • Fluorescent material and white light emitting device
  • Fluorescent material and white light emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Referring to the chemical formula (Y 2.2 Ba 0.6 )Al 5 o 12 : Ce 0.2 Weigh Y proportionally 2 o 3 , CeO 2 、Al 2 o 3 with BaF 2 After the appropriate raw materials are uniformly mixed and ground in a mortar, the powder is placed in a reducing atmosphere at 1300-1500 ° C [N 2 / H 2 (5%)] sintered for 8-16 hours to make its luminescent center Ce 4+ Revert to Ce 3+ , the yellow product can be obtained.

[0029] Y prepared by solid-state synthesis method according to the embodiments of the present invention 2.8 al 5 o 12 : Ce 0.2 product and (Y 2.2 Ba 0.6 )Al 5 o 12 : Ce 0.2 The X-ray powder diffraction pattern of product identifies its crystalline phase purity, respectively as Figure 2a and Figure 2b shown. According to the actuarial calculation of the structure, Table 1 shows the lattice parameters and reliability index of Comparative Example 1, where χ 2 =3.41,R wp = 8.83% with R p =5.68%, the lattice parameter is a=b=c=12.0225(1) The lattice ...

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Abstract

The invention relates to a fluorescent material and a white light emitting device. The fluorescent material has the following structural formula: (Re1-yBay)3-x(Rg)5O12:Cex, wherein Re is one or a combination of Y, Tb, Lu, Sc, La, Gd and Sm; Rg is one or a combination of Al, Ga and In; and 0<x<3 and 0<y<1. The fluorescent material and white light emitting device provided by the invention are simple and quick to prepare and easy to realize mass production; and the material has the advantages of high thermal stability, high luminous intensity and great industrial application value.

Description

technical field [0001] The invention relates to a fluorescent material with high thermal stability, in particular to a fluorescent material and a white light emitting device. Background technique [0002] In 1962, Nick Holonyak Jr. of General Electric Company developed the first practical visible light-emitting diode. In the 1970s, LEDs made of gallium phosphide (GaP) and gallium arsenic phosphide (GaAsP) were developed. The light-emitting wavelengths are mainly red, yellow, orange, and green, and they are used in indicator lights and digital displays. In 1991, due to the development of LEDs made of aluminum gallium indium phosphide (InGaAlP), the LED industry began to develop towards high brightness, which was applied to traffic lights, automobile brake lights, tail lights, etc. In 1991, Shuji Nakamura of Japan's Nichia Corporation invented LEDs made of gallium nitride (GaN) and indium gallium nitride (InGaN). The blue-violet light LED products that have been specialized ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80C09K11/78H01L33/50
CPCY02B20/181Y02B20/00
Inventor 林仁钧王书任蔡佩君陈国儒林群哲刘如熹
Owner CHINA GLAZE CO LTD
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