Ultraviolet light excited three-component white light fluorescent powder and preparation method thereof

A three-component, ultraviolet light technology, applied in the field of white light phosphors, can solve the problems of being unsuitable for large-scale popularization and application, complicated preparation methods, etc., and achieve the effects of mature reaction conditions, simple preparation and high yield

Inactive Publication Date: 2017-07-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods of these phosphors are relatively complicated and are not suitable for large-scale application. Therefore, higher requirements are put forward for t

Method used

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  • Ultraviolet light excited three-component white light fluorescent powder and preparation method thereof
  • Ultraviolet light excited three-component white light fluorescent powder and preparation method thereof
  • Ultraviolet light excited three-component white light fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of blue phosphor

[0047] 1) Weigh 10g of dicyandiamide and place it in a clean ceramic crucible, wrap it with aluminum foil and move it to a muffle furnace, and calcine it in air at 520°C for 2h, with a heating rate of preferably 3°C / min; after calcination, cool naturally to At room temperature, a light yellow blocky solid was obtained, which was collected by grinding with an agate mortar to obtain 5.2 g of light yellow powder g-C 3 N 4 .

[0048] 2) Take 2g g-C 3 N4 Put it into 50mL of concentrated nitric acid with a concentration of 65%, heat and stir at 80°C for 2 hours, the light yellow powder gradually turns white, after the reaction is completed, let it stand and cool to room temperature; collect the white powder by centrifugation, and wash the white powder with deionized water After many times, move it into a vacuum drying oven to dry at 60°C for 12 hours, grind and collect the white powder, that is, the blue phosphor, which is denoted as ACN....

Embodiment 2

[0063] (1) Preparation of blue phosphor

[0064] 1) Weigh 10g of dicyandiamide and place it in a clean ceramic crucible, wrap it with aluminum foil and move it to a muffle furnace, and calcine it in air at 500°C for 4h, with a heating rate of preferably 2°C / min; after calcination, cool naturally to At room temperature, a light yellow blocky solid was obtained, which was collected by grinding with an agate mortar to obtain 5.2 g of light yellow powder g-C 3 N 4 .

[0065] 2) Take 2g g-C 3 N 4 Put it into 50mL of concentrated nitric acid with a concentration of 65%, heat and stir at 80°C for 6h, the light yellow powder gradually turns white, after the reaction, let stand and cool to room temperature; collect the white powder by centrifugation, wash the white powder with deionized water After many times, move it into a vacuum drying oven to dry at 60°C for 12 hours, grind and collect the white powder, that is, the blue phosphor, which is denoted as ACN.

[0066] (2) Preparat...

Embodiment 3

[0077] (1) Preparation of blue phosphor

[0078] 1) Weigh 10g of dicyandiamide and place it in a clean ceramic crucible, wrap it with aluminum foil and move it to a muffle furnace, and calcine it in the air at 550°C for 2h, the heating rate is preferably 5°C / min; after the calcination, cool naturally to At room temperature, a light yellow blocky solid was obtained, which was collected by grinding with an agate mortar to obtain 5.2 g of light yellow powder g-C 3 N 4 .

[0079] 2) Take 2g g-C 3 N 4 Put it into 50mL of concentrated nitric acid with a concentration of 65%, heat and stir at 25°C for 1h, the light yellow powder gradually turns white, after the reaction, let it stand and cool to room temperature; collect the white powder by centrifugation, and wash the white powder with deionized water After many times, move it into a vacuum drying oven to dry at 60°C for 12 hours, grind and collect the white powder, that is, the blue phosphor, which is denoted as ACN.

[0080] ...

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Abstract

The invention discloses ultraviolet light excited three-component white light fluorescent powder. The ultraviolet light excited three-component white light fluorescent powder is formed by mixing blue fluorescent powder, green fluorescent powder and red fluorescent powder according to the mass percent of 30 to 40 percent, 25 to 35 percent and 30 to 35 percent, wherein the blue fluorescent powder is graphite phase carbon nitride treated by nitric acid; the green fluorescent powder is carbon nitride modified by a phenyl group; the red fluorescent powder is 2,7 dibromo(4-(diphenyl aminophenyl)phenyl)-9-fluorenone. The invention also discloses a preparation method of the ultraviolet light excited three-component white light fluorescent powder. The three-component white light fluorescent powder disclosed by the invention does not contain rare earth ions and can be matched with an ultraviolet light emitting diode to generate white light; the ultraviolet light excited three-component white light fluorescent powder has the advantages of lower preparation temperature, energy saving, environment friendliness and simple process.

Description

technical field [0001] The invention relates to a white light phosphor, in particular to a preparation method of a non-rare earth three-component white light phosphor. Background technique [0002] Since 1996, Nichia first used InGaN blue chip plus YAG (yttrium aluminum garnet) phosphor to make white LED. Since then, white LEDs have gradually replaced traditional incandescent lamps and fluorescent lamps as a new type of lighting source due to their advantages of high brightness, energy saving, environmental protection, and long service life. The use of white LED lighting can save a lot of energy, and at the same time reduce the pollution to the environment after the mercury lamp is scrapped. [0003] There are three main ways to realize white light LED. The first is the combination of three primary color chips to achieve white light, but the price is relatively high, and the luminous stability is greatly affected by a single chip; the second is that the blue light chip exci...

Claims

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Application Information

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IPC IPC(8): C09K11/00C09K11/06C09K11/65
CPCC09K11/00C09K11/06C09K11/0883C09K11/65Y02B20/00Y02P20/10
Inventor 方晓明陈天翔张正国
Owner SOUTH CHINA UNIV OF TECH
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