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Beta-SIALON FLUORESCENT BODY AND LIGHT-EMITTING DEVICE

A technology of phosphors and light-emitting elements, applied in the directions of light-emitting materials, optics, semiconductor devices, etc., can solve problems such as poor color reproducibility, achieve stable light-emitting properties, and suppress uneven light-emitting properties.

Active Publication Date: 2020-11-13
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem of poor color reproducibility in image display devices such as liquid crystal backlights.

Method used

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  • Beta-SIALON FLUORESCENT BODY AND LIGHT-EMITTING DEVICE
  • Beta-SIALON FLUORESCENT BODY AND LIGHT-EMITTING DEVICE

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Using a V-type mixer, 98.06 wt% of α-type silicon nitride powder (SN-E10 grade, manufactured by Ube Industries, Ltd.), 1.34 wt% of aluminum nitride powder (E grade, manufactured by Tokuyama Co., Ltd.), europium oxide ( RU grade, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.60 wt% was mixed. All of the mixture was passed through a sieve with a mesh size of 250 μm to remove aggregates to obtain raw material mixed powder.

[0054] 250 g of the raw material mixed powder that passed through the sieve was filled into a cylindrical boron nitride container with a cover (N-1 grade manufactured by Denki Kagaku Co., Ltd.), and an electric furnace with a carbon heater was used in a pressurized nitrogen atmosphere of 0.8 MPa. Heat treatment was performed at 2000° C. for 15 hours.

[0055] After cooling, the sample recovered from the furnace was a green lump, which was crushed in a mortar and finally passed through a sieve with a mesh size of 150 μm.

[0056] The obtained phosph...

Embodiment 2～4、 comparative example 1

[0066] The pulverization and classification conditions were changed so as to form D10, D50 (mass median particle size), and D90 shown in Table 1, and Examples 2 to 4 and Comparative Example were produced under the same conditions as in Example 1 except that 1 phosphor powder. The properties of the phosphors obtained in Examples 2 to 4 and Comparative Example 1 are shown in Table 1 together with the results of Example 1.

Embodiment 5

[0068] Grinding and classification conditions were changed in such a way as to form D10, D50 (mass median particle size), and D90 shown in Table 1, and cleaning based on ethanol aqueous solution was implemented after pickling. In addition, in the same manner as in Example 1, The phosphor powder of Example 5 was produced under the same conditions. The properties of the phosphor obtained in Example 5 are also shown in Table 1.

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Abstract

Provided is a beta-SiAlON fluorescent body that is represented by general formula: Si6-zAlzOzN8-z (0 < z < 4.2), that has, as a host crystal, the same crystal structure as that of the beta-SiAlON crystal phase, and that has a bulk density of 0.80-1.60 g / cm3. Also, provided is a light-emitting element having the beta-SiAlON fluorescent body and a semiconductor light-emitting element capable of exciting the beta-SiAlON fluorescent body.

Description

technical field [0001] The present invention relates to a β-sialon phosphor that emits green light when excited by light of wavelengths from ultraviolet light to blue light, and a light-emitting device using the same. Background technique [0002] A white LED is a device that emits pseudo-white light by combining a semiconductor light emitting element and a phosphor, and a combination of a blue LED and a YAG yellow phosphor is known as a representative example thereof. However, image display devices such as liquid crystal backlights have a problem of poor color reproducibility. Therefore, a white LED using a combination of a green phosphor and a red phosphor instead of a yellow phosphor has been developed. [0003] A β-sialon phosphor is known as a phosphor emitting green light. (Patent Document 1) If Europium (Eu 2+ ), it forms a phosphor that is excited by light from ultraviolet to blue to display green light emission at 520-550 nm, and can be used as a green light-emit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64H01L33/50
CPCC09K11/77348H01L33/502Y02B20/00C09K11/64H01L33/501C09K11/0883C09K11/646C09K11/77066C01P2004/90C01P2002/30C01P2004/51C01P2006/11
Inventor 武田雄介野见山智宏小林学渡边真太郎
Owner DENKA CO LTD
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