Single-matrix single-doping white light-emitting material and preparation method and application thereof

A white light-emitting, single-substrate technology, applied in light-emitting materials, chemical instruments and methods, electrical components, etc., can solve the problems of color reproduction and luminous efficiency limitations, expensive LED chips, lack of red fluorescent components, etc. The effect of chemical stability, appropriate color coordinates, and high crystallinity

Inactive Publication Date: 2017-04-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first of the above three methods has been commercialized, but due to the lack of red fluorescent components, the color rendering index is low; the second method has poor color reproduction due to the problems of the ratio of different phosphors and color reabsorption. The brightness and luminous efficiency are limited to a large extent; the third method is more complicated in circuit design due to the different output voltage and light decay of different chips, and the price of such LED chips is relatively expensive.

Method used

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  • Single-matrix single-doping white light-emitting material and preparation method and application thereof
  • Single-matrix single-doping white light-emitting material and preparation method and application thereof
  • Single-matrix single-doping white light-emitting material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Weigh lutetium oxide (Lu 2 O 3 ) 0.5939 g, dysprosium oxide (Dy 2 O 3 ) 0.0028 g, niobium oxide (Nb 2 O 5 ) 0.3987 g, in an agate mortar, add absolute ethanol as the medium, grind and mix thoroughly; place the mixture in a cold isostatic press under a pressure of 150 MPa to form a diameter of 12.5 mm and a height of about 5 mm Cylindrical piece; Place the raw piece in a corundum crucible, in an air atmosphere, in a resistance furnace at a speed of 5 ℃ / min to 1220 ℃ for the second stage sintering, sintering time is 5h, natural cooling to room temperature; Take out and grind, and finally get the product, its chemical composition expression is: Lu 0.995 Dy 0.005 NbO 4 .

Embodiment 2

[0040] Weigh lutetium oxide (Lu 2 O 3 ) 0.5909 g, dysprosium oxide (Dy 2 O 3 ) 0.0056 g, niobium oxide (Nb 2 O 5 ) 0.3987 g, in an agate mortar, add absolute ethanol as the medium, grind and mix thoroughly; place the mixture in a cold isostatic press under a pressure of 150 MPa to form a diameter of 12.5 mm and a height of about 5 mm Cylindrical piece; Place the raw piece in a corundum crucible, in an air atmosphere, in a resistance furnace at a speed of 5 ℃ / min to 1220 ℃ for the second stage sintering, sintering time is 5h, natural cooling to room temperature; Take out and grind, and finally get the product, its chemical composition expression is: Lu 0.99 Dy 0.01 NbO 4 .

Embodiment 3

[0042] Weigh lutetium oxide (Lu 2 O 3 ) 0.5879 g, dysprosium oxide (Dy 2 O 3 ) 0.0084 g, niobium oxide (Nb 2 O 5 ) 0.3987 g, in an agate mortar, add absolute ethanol as the medium, grind and mix thoroughly; place the mixture in a cold isostatic press under a pressure of 150 MPa to form a diameter of 12.5 mm and a height of about 5 mm Cylindrical piece; Place the raw piece in a corundum crucible, in an air atmosphere, in a resistance furnace at a speed of 5 ℃ / min to 1220 ℃ for the second stage sintering, sintering time is 5h, natural cooling to room temperature; Take out and grind, and finally get the product, its chemical composition expression is: Lu 0.985 Dy 0.015 NbO 4 .

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Abstract

The invention discloses a single-matrix single-doping white light-emitting material and a preparation method and application thereof. The chemical composition expression formula of the material is Lu(1-x)DyxNbO4, wherein x is the mole percentage content of an active ion Dy3+ relative to a matrix rare earth ion Lu3+, and x is larger than or equal to 0.005 and smaller than or equal to 0.20. The white light-emitting material belongs to niobate and has preferable physical and chemical stability compared with other compounds. A matrix material LuNbO4 contains the rare earth ion Lu3+, so that Dy3+ ions are convenient to dope. By utilizing effective light-emitting of NbO4<3-> groups in a matrix, the crystallinity is high, and the light-emitting quality is good.

Description

Technical field [0001] The invention belongs to the technical field of white light LED light conversion materials, and more specifically, relates to a single-host single-doped white light-emitting material, and a preparation method and application thereof. Background technique [0002] White LED has significant advantages such as high luminous efficiency, long life, low energy consumption, and no pollution. It has the incomparable advantages of other traditional lighting sources and has been widely used in lighting, display and other fields. At present, the realization of white light LED mainly has the following three ways: one is to use blue chip to excite yellow phosphor to form white light; the other is to use near ultraviolet LED chip to excite the mixed phosphor of red, green and blue to obtain white light; third is to use red, green and blue The LED chips are assembled together, and white light emission is realized by controlling the current of the three primary color chip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01L33/50
CPCH01L33/502C09K11/7769Y02B20/00
Inventor 梁宏斌刘春梦
Owner SUN YAT SEN UNIV
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