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A kind of preparation method of malsio4:er3+ green phosphor for LED

A fluorescent powder and green light technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of uneven particle size of phosphor particles, uneven mixing of activators, affecting mixing uniformity, etc., and achieve particle size The effect of uniform size distribution, uniform dispersion and low calcination temperature

Active Publication Date: 2018-04-13
SHENZHEN JUFEI OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the Er obtained by the traditional solid-phase method. 3+ Activate the silicate green light phosphor material and directly carry out high-temperature calcination. The activator in the obtained phosphor powder is unevenly mixed, resulting in a broad-band emission peak of the green light phosphor and low green color purity; at the same time, the particle size of the phosphor particles is uneven. , which affects the technical bottleneck of mixing uniformity with packaging glue in the later use process, thus proposing a phosphor particle with uniform particle size distribution, narrow emission peak half-wave width, high green color purity, suitable for high color gamut white LEDs MAlSiO used 4 :Er 3+ Preparation method of green fluorescent powder

Method used

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  • A kind of preparation method of malsio4:er3+ green phosphor for LED
  • A kind of preparation method of malsio4:er3+ green phosphor for LED

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 This example discloses a MAlSiO for LED 4 :Er 3+ The specific steps of the preparation method of green phosphor are as follows:

[0030] (1) Weigh 3.001g of Al(NO 3 ) 3 ·9H 2 O particles are placed in a high-pressure container (the volume of the high-pressure container is 80mL, the material is PTFE lined, stainless steel shell, and the pressure range is 0-10Mpa), and the filling ratio is 50% (refers to the ratio of the solvent volume to the volume of the high-pressure container ), C 2 H 5 O (absolute ethanol): H 2 O (distilled water) = 0.29:1 volume ratio, add 9mL of C into the high pressure vessel 2 H 5 O and 31mL of H 2 O, to be Al(NO 3 ) 3 ·9H 2 After the O particles are fully dissolved, Al(NO) with a concentration of 0.2mol / L is formed in the high-pressure vessel 3 ) 3 Solution (referring to Al 3+ Account for C 2 H 5 O and H 2 O the concentration of the total volume of the mixture);

[0031] (2) Weigh 0.801g of KHCO according to the molar ratio of K:Al:Si=1:1:1 ...

Embodiment 2

[0036] Example 2 This example discloses a MAlSiO for LED 4 :Er 3+ The specific steps of the preparation method of green phosphor are as follows:

[0037] (1) Weigh 4.502g of Al(NO 3 ) 3 ·9H 2 O particles are placed in a high-pressure container (the volume of the high-pressure container is 80mL, the material is PTFE lined, stainless steel shell, the pressure range is 0-10Mpa), and the filling ratio is 30% (refers to the ratio of the solvent volume to the volume of the high-pressure container ), C 2 H 5 O (absolute ethanol): H 2 O (distilled water) = 0.25:1 volume ratio, add 4.8mL of C into the high pressure vessel 2 H 5 O and 19.2mL of H 2 O, to be Al(NO 3 ) 3 ·9H 2 After the O particles are fully dissolved, in the high-pressure vessel, a concentration of 0.5mol / L Al(NO 3 ) 3 Solution (referring to Al 3+ Account for C 2 H 5 O and H 2 O the concentration of the total volume of the mixture);

[0038] (2) According to the molar ratio of K:Al:Si=1:1:1, weigh 1.201g of KHCO 3 And 0.721g o...

Embodiment 3

[0043] Embodiment 3: This embodiment discloses a MAlSiO for LED 4 :Er 3+ The specific steps of the preparation method of green phosphor are as follows:

[0044] (1) Weigh 6.302g of Al(NO 3 ) 3 ·9H 2 O particles are placed in a high-pressure vessel (the volume of the high-pressure vessel is 80mL, the material is PTFE lined, stainless steel shell, and the pressure range is 0-10Mpa), and the filling ratio is 60% (refers to the ratio of the solvent volume to the volume of the high-pressure vessel ), C 2 H 5 O (absolute ethanol): H 2 O (distilled water) = 0.2:1 volume ratio, add 8mL of C into the high pressure vessel 2 H 5 O and 40mL of H 2 O, to be Al(NO 3 ) 3 ·9H 2 After the O particles are fully dissolved, Al(NO 3 ) 3 Solution (referring to Al 3+ Account for C 2 H 5 O and H 2 O the concentration of the total volume of the mixture);

[0045] (2) According to the molar ratio of Li:Na:Al:Si=0.5:0.5:1:1, weigh 0.352g of LiOH·H 2 O, 0.336g NaOH and 3.450g Si(OC 2 H 5 ) 4 . Follow Er 3+ T...

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Abstract

The invention belongs to the technical field of preparation of phosphors through wet chemistry methods and in particular relates to a preparation method of an MAlSiO4:Er<3+> green phosphor for LEDs. The method comprises the following steps: preparing MxSr1-xTiO3:Er<3+> high-purity green phosphor by using a solvothermal method, wherein x is greater than 0 and less than or equal to 0.5, and then calcining at low temperature in a later stage to obtain the MAlSiO4:Er<3+> green phosphor. Compared with the conventional high-temperature solid-phase method, the later stage calcining temperature needed for the solvothermal method is low; the requirement on equipment is low; the energy consumption is low; the method is suitable for industrial production; Er<3+> in the prepared phosphor is uniform in dispersion and easily enters MxSr1-xTiO3 for implementing energy transmission; the prepared green phosphor is narrow in half-wave width of emission peak and high in green color purity; the particle size distribution is uniform; the phosphor can be uniformly mixed with glue in later-stage application and is suitable for high-color-gamut white LEDs.

Description

Technical field [0001] The invention belongs to the technical field of wet chemical preparation of phosphors, and specifically relates to a MAlS iO for LED 4 :Er 3+ Preparation method of green phosphor. Background technique [0002] At present, rare earth luminescent materials have become core materials in the fields of information display, lighting sources, and optoelectronic devices. Among them, the most widely used are phosphor materials that can be excited by ultraviolet light-blue light (200-500nm) to produce different luminous colors. The high luminous intensity, high color purity and uniform particle size of phosphors can significantly improve the performance of optoelectronic devices. Green phosphor is one of the important components of three primary color phosphors. At present, the matrix materials of green phosphor mainly include aluminate, silicate, tungstate and titanate. However, green phosphors of different systems are There are differences in color purity and lum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64
CPCC09K11/646
Inventor 高丹鹏李超凡邢其彬
Owner SHENZHEN JUFEI OPTOELECTRONICS CO LTD