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Phosphor, light emitting device and white light emitting diode

A light-emitting diode and white light-emitting technology, which is applied to the use of light-emitting materials, semiconductor devices, and gas discharge lamps, and can solve problems such as the reduction of luminous intensity

Inactive Publication Date: 2013-06-19
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The phosphors described in these gazettes will have lower luminous intensity when the temperature of the use environment is high.

Method used

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  • Phosphor, light emitting device and white light emitting diode
  • Phosphor, light emitting device and white light emitting diode
  • Phosphor, light emitting device and white light emitting diode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Lithium carbonate (manufactured by Kanto Chemical Co., Ltd., purity 99%), strontium carbonate (Sakai Chemical Industry Co., Ltd. Manufactured, purity 99% or more), calcium carbonate (manufactured by Ube Materials Co., Ltd., purity 99.9%), europium oxide (manufactured by Shin-Etsu Chemical Co., Ltd., purity 99.99%), silicon dioxide (manufactured by Nippon Aerosil Co., Ltd., purity 99.99%) ), a total of 10 parts by weight of these materials and 150 parts by weight of isopropanol were added in the wet ball mill, and mixed for 4 hours to obtain a slurry. After drying the slurry with an evaporator at 70°C, the resulting metal compound mixture was fired at 900°C for 12 hours in the air, and then slowly cooled (cooling rate 5°C / min) to room temperature (25°C). . Next, after crushing with an agate mortar, the 2 N 2 Firing was carried out at 900° C. for 12 hours in an atmosphere, and then slowly cooled to room temperature (cooling rate: 5° C. / minute), whereby phosphor 2 was o...

Embodiment 2

[0084] Lithium carbonate (manufactured by Kanto Chemical Co., Ltd., purity 99%), strontium carbonate (Sakai Chemical Industry Co., Ltd. Manufactured, purity 99% or more), barium carbonate (Nippon Chemical Industry Co., Ltd., purity 99% or more), europium oxide (manufactured by Shin-Etsu Chemical Co., Ltd., purity 99.99%), silicon dioxide (manufactured by Nippon Aerosil Co., Ltd., purity 99.99%) %) as a raw material, the same operation as in Example 1 was performed to obtain phosphor 3 . Table 1 shows the composition of the phosphor 3, and Table 2 shows the measurement results of the emission intensity.

Embodiment 3

[0086] Lithium carbonate (manufactured by Kanto Chemical Co., Ltd., purity 99%), strontium carbonate (Sakai Chemical Industry Co., Ltd., purity 99% or more), calcium carbonate (Ube Material Co., Ltd., purity 99.9%), europium oxide (Shin-Etsu Chemical Co., Ltd., purity 99.99%), silicon dioxide (Nippon Aerosil Co., Ltd. , purity 99.99%), ammonium chloride (manufactured by Wako Pure Chemical Industries, Ltd., purity 99%), a total of 10 parts by weight of these compounds and 150 parts by weight of isopropanol were added to a wet ball mill and mixed for 4 hours to obtain The slurry. After drying the slurry at 70° C. with an evaporator, the obtained metal compound mixture was fired at 900° C. for 12 hours in an air atmosphere, and then gradually cooled to room temperature. Next, after crushing with an agate mortar, the 2 N 2 After baking at 900° C. for 12 hours in an atmosphere, the phosphor was gradually cooled to room temperature, and Phosphor 4 was obtained. Table 1 shows the...

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Abstract

Provided are a phosphor, a light emitting device and a white light emitting diode. A phosphor which comprises a compound represented by the formula (1) and Eu as an activating agent. aM1 2O

Description

[0001] This application is a divisional application with the application number 200680005441.4 and the title of the invention is luminous body, light emitting device and white light emitting diode. technical field [0002] The invention relates to a phosphor, a light emitting device and a light emitting diode. Specifically, the present invention relates to a phosphor having low temperature dependence of emission intensity and excellent thermal stability, a light-emitting device and a light-emitting diode including the phosphor. Background technique [0003] Phosphors are used in light-emitting devices (such as white light-emitting diodes, hereinafter referred to as "LEDs") that use light in the ultraviolet to blue region as an excitation source. As phosphors for white LEDs, for example, the formula Y 3 al 5 o 12 : the compound represented by Ce (Japanese Unexamined Publication No. 10-242513); by (Ba 1-x-y-z Sr x Ca y ) 2 SiO 4 :Eu z The compound represented by the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59C09K11/61H01L33/50H01L33/32
CPCH01L33/502C09K11/7734Y02B20/181Y02B20/00C09K11/77342
Inventor 今成裕一郎宫崎进户田健司
Owner SUMITOMO CHEM CO LTD
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