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Nitride phosphor and production process thereof, and light emitting device

A technology of phosphors and silicon nitrides, which is applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc., and can solve problems such as the influence of color image tone

Inactive Publication Date: 2006-08-16
NICHIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Even with such a slight color shift, when the above-mentioned light-emitting device is used as a light source of a liquid crystal projector, for example, there is a problem that the color tone of a color image projected on a screen is greatly affected.

Method used

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  • Nitride phosphor and production process thereof, and light emitting device
  • Nitride phosphor and production process thereof, and light emitting device
  • Nitride phosphor and production process thereof, and light emitting device

Examples

Experimental program
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Effect test

Embodiment approach 1

[0386] The phosphor of the present invention is characterized in that it has the general formula L X M Y N ((2 / 3)X+(4 / 3)Y) : R series or L X M Y O Z N ((2 / 3)X+(4 / 3)Y-(2 / 3)Z) : A nitride phosphor represented by R, and the nitride phosphor contains an element different from the above-mentioned L, the above-mentioned M, the above-mentioned O, the above-mentioned N, the above-mentioned and the R series (hereinafter referred to as "different element")

[0387] Here, L is selected from at least one or more group II elements consisting of Mg, Ca, Sr, Ba, and Zn,

[0388] M is selected from C, Si, Ge, Si is at least one of the necessary group IV elements,

[0389] R is selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Lu. Eu is at least one of the essential rare earth elements.

[0390] In the general formula, X, Y, and Z are arbitrary numbers greater than zero. In particular, X and YX=2, Y=5 or X=1 and Y=7 are preferable. Specifically, (Sr T Ca 1-T ) 2 Si 5 N 8 : Eu, Sr 2 ...

Embodiment approach 2

[0480] The light-emitting device of Embodiment 2 is the same as Embodiment 1, and has at least:

[0481] A light-emitting element having a first emission spectrum; and

[0482] The phosphor converts at least a part of the first emission spectrum to wavelength and has a second emission spectrum.

[0483] The light-emitting device of the second embodiment uses only a nitride phosphor described later as the phosphor 11, for example. The phosphor 11 absorbs part of the light in the ultraviolet to blue region that is emitted by the light emitting element 10, and emits the light in the yellow to red region. The light-emitting device of the second embodiment uses the phosphor 11 in the light-emitting device of type 1, and according to the mixture of the blue color of the light-emitting element 10 and the red color of the phosphor, the warm color white or pink A light-emitting device that emits light with a soft color. The light-emitting device of Embodiment 2 is a light-emitting device t...

Embodiment approach 3

[0506] The light-emitting device according to the third embodiment of the present invention is a light-emitting device of form 1 (cannonball type) shown in FIG. 1, and has the same configuration as that of the first embodiment except that a phosphor described later is used.

[0507] Hereinafter, the phosphor of the light-emitting device of the present invention will be described in detail.

[0508] The phosphor of the third embodiment of the present invention is LMN:Eu, WR series or LMON:Eu, WR series (L contains at least one selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn valence II One or more. M contains at least one selected from the group consisting of C, Si, Ge, Sn, Ti, ZR, and Hf with IV valence. N nitrogen. Eu is europium. WR is rare earth other than Eu Class element).

[0509] The following description relates to the phosphor of the third embodiment of the present invention, mainly Ca-Si-N:Eu, WR series, or Sr-Si-N:Eu, WR series, or Sr-Ca-Si-N:Eu , WR ser...

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Abstract

PROBLEM TO BE SOLVED: To provide a white-emitting phosphor excellent in light-emitting characteristics, and to provide a phosphor exhibiting light-emitting characteristics featured in high luminance in a extremely high yield.SOLUTION: The method for manufacturing a nitride phosphor comprising as an essential constituent element at least nitrogen and represented by L<SB>x< / SB>M<SB>y< / SB>N(2 / 3X+4 / 3Y):Z, which has at least one second emission spectrum obtained by converting at least a part of a first emission spectrum within a region different from a region of the first emission spectrum, comprises a step for calcination in an ammonia atmosphere. In the formula, L is selected among Be, Mg, Ca, Sr, Ba, Zn, Cd and Hg; M is selected among C, Si, Ge, Sn, Ti, Zr and Hf; and Z is an activator.

Description

[0001] This application is a divisional application of an international application filed by the applicant on March 20, 2003 with the application number 03800454.2 and the invention title of nitride phosphor, its manufacturing method and light-emitting device. The date of the application entering the national phase is December 17, 2003. Technical field [0002] The present invention relates to light-emitting devices such as semiconductor light-emitting elements, fluorescent lamps, etc., lighting, displays, and backlights for liquid crystals, and more particularly to nitride phosphors used in light-emitting devices. Background technique [0003] A light-emitting device using a semiconductor light-emitting element is compact, has excellent power efficiency, and can emit light with bright colors. Since the light source is a semiconductor element, it has the advantage of not having to worry about bursting. It even has excellent initial drive characteristics and has extremely high repe...

Claims

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Application Information

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IPC IPC(8): C09K11/08C09K11/59C09K11/65C09K11/66C09K11/77H01L33/00C09K11/67H01L33/32H01L33/50H01L33/54H01L33/56H01L33/62
CPCH01L2224/32245H01L2224/8592H01L2224/48257H01L2224/73265H01L2224/45144H01L2924/01322H01L2924/01066H01L2224/49107H01L2924/01067H01L2224/48091H01L2924/01055H01L2224/48247H01L2924/01037H01L2924/01019H01L2224/48465H01L2924/3025H01L2924/01068H01L2924/181H01L2924/00H01L2924/00014H01L2924/00012
Inventor 玉置宽人龟岛正敏高岛优山田元量内藤隆宏阪井一彥村崎嘉典
Owner NICHIA CORP
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