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Silicate phosphor, manufacturing method thereof, and light generating device

A phosphor and silicate technology, applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc., can solve the problems of low productivity, expensive, size control, separation and grinding in the manufacturing process, and achieve stable emission brightness , the effect of small color changes

Active Publication Date: 2016-08-03
SAMSUNG DISPLAY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the manufacturing process for manufacturing nitride / nitride-based phosphors is performed at high temperature and high pressure, thereby requiring expensive equipment for manufacturing nitride / nitride-based phosphors
In addition, the size control, separation and grinding of the particles is not easy, so the productivity of the manufacturing process is low

Method used

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  • Silicate phosphor, manufacturing method thereof, and light generating device
  • Silicate phosphor, manufacturing method thereof, and light generating device
  • Silicate phosphor, manufacturing method thereof, and light generating device

Examples

Experimental program
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example 1

[0095] Weigh CaCO 3 , SiO 2 and Ce 2 o 3 , and mixing them with each other such that CaCO 3 , SiO 2 and Ce 2 o 3 The molar ratios are about 1.97:1:0.015, respectively. The obtained mixture was placed in a melting pot, and the melting pot was placed in an electric stove. Thereafter, the mixture was sintered at about 1450° C. for about 4 hours at about 1 atm with a mixed gas including hydrogen and nitrogen in a volume ratio of about 5:95. Thereafter, the mixture was cooled to room temperature at about 15° C. / minute to obtain a crystalline silicate phosphor composition. The silicate phosphor is uniformly crushed by ball milling to form a silicate phosphor powder.

[0096] Figure 4 is the X-ray diffraction (XRD) profile of Example 1. refer to Figure 4, the powder diffraction pattern of the silicate phosphor of Example 1 agrees with that of the standard material according to JCPDS #87-1257. Therefore, it can be noted that the silicate phosphor of Example 1 has a γ-ph...

example 2

[0103] Weigh CaCO 3 , SiO 2 and Ce 2 o 3 , and mixing them with each other such that CaCO 3 , SiO 2 and Ce 2 o 3 The molar ratios are about 1.99:1:0.005, respectively. A silicate phosphor was obtained from the mixture by substantially the same method as that of Example 1. The silicate phosphor has a γ-phase orthorhombic structure with space group Pbnm62, with Ca 1.99 SiO 4 :0.01Ce 3+ Indicates the silicate phosphor.

example 3

[0105] Weigh CaCO 3 , SiO 2 and Ce 2 o 3 , and mixing them with each other such that CaCO 3 , SiO 2 and Ce 2 o 3 The molar ratios are about 1.98:1:0.01, respectively. A silicate phosphor was obtained from the mixture by substantially the same method as that of Example 1. The silicate phosphor has a γ-phase orthorhombic structure with space group Pbnm62, with Ca 1.98 SiO 4 :0.02Ce 3+ Indicates the silicate phosphor.

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Abstract

Provided are a silicate phosphor composition, a manufacturing method thereof, and a light emitting device. The silicate phosphor composition has a γ-phase orthorhombic crystal structure, and the space group of the silicate phosphor is Pbnm 62, and the composition of the silicate phosphor is represented by the following chemical formula: Ca 2‑x‑y‑z m x SiO 4 :yCe 3+ , zN (0≤x<0.5, 0<y≤0.1, 0≤z<0.15), in the above formula, M represents from Mg, Sr, Ba, Zn, Na, Al, Ga, Ge, P, At least one member selected from the group consisting of As and Fe, N means from Eu 2+ , Mn 2+ , Tb 3+ , Yb 2+ and Tm 3+ At least one selected member of the group formed. The silicate phosphor has a maximum absorbance for a wavelength of about 450 nm to about 475 nm corresponding to a major part of blue excitation light, and has good stability at high temperature. This silicate phosphor can be combined with a blue light source to produce white light.

Description

technical field [0001] The present disclosure relates to a silicate phosphor composition, a method of manufacturing the silicate phosphor, and a light generating device having the silicate phosphor. More particularly, exemplary embodiments according to the present disclosure relate to a silicate phosphor composition that can be used to generate white light, a method of manufacturing the silicate phosphor composition, and a silicate phosphor composition. A light generating device in which the phosphor composition is disposed. Background technique [0002] Recently, a class of white light emitting diodes (wLEDs) has been developed, which has relatively small power consumption, small size, and light weight, and is widely used in, for example, light sources for lighting devices and backlights for liquid crystal display devices. source. [0003] Such wLEDs for generating white light typically include a blue light emitting element (eg, a semiconductor element) with a yellow phos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/74C09K11/64C09K11/62C09K11/71C09K11/59C09K11/60C09K11/66H01L33/50
CPCH01L33/502Y02B20/00C09K11/77212C09K11/59C09K11/71H01L33/00
Inventor 申明洲白昇桓李荣培金泳植南锡铉杨秉春金钟守朴光元朴允亨刘知帅林亨锡
Owner SAMSUNG DISPLAY CO LTD
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