Panchromatic fluorescent powder for white LED and preparation method of panchromatic fluorescent powder

A phosphor and full-color technology, applied in the field of full-color phosphors for white light LEDs and their preparation, can solve the problem that excited ions are difficult to emit white light, and achieve a simple and convenient preparation process, low synthesis cost, and good crystal development. Effect

Active Publication Date: 2013-05-01
GOLDP ELECTRICAL APPLIANCES
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common of these is the co-doping of two or more ions (Eu 2+ / Mn 2+ 、Ce 3+ / Mn 2+ 、Eu 2+ / Mn 2+ / Tb 3+ ) single-matrix white light phosphor, it is difficult to achieve white light emission with a single excited ion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Panchromatic fluorescent powder for white LED and preparation method of panchromatic fluorescent powder
  • Panchromatic fluorescent powder for white LED and preparation method of panchromatic fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) First follow 0.02mol of Sr 1.995 MgSi 2 o 7 :0.005Tb 3+ Weigh 0.00005mol of Tb with the content of Tb 4 o 7 , Tb 4 o 7 commercially available Tb 4 o 7 , with a purity of 99.99%, put it in a beaker, add nitric acid solution with a mass concentration of 56-58% into the beaker, stir continuously in a water bath at 60-80°C to dissolve it completely, add deionized water, and make Tb 3+ The molar concentration of 0.01mol / L is recorded as solution A.

[0031] 2) According to 0.02mol of Sr 1.995 MgSi 2 o 7 :0.005Tb 3+ Weigh analytically pure Sr(NO 3 ) 2 0.0399mol, Mg(N0 3 ) 2 ·6H 2 O0.02mol, H 3 BO 3 0.002mol and 0.1mol of urea were added to solution A, stirred thoroughly to dissolve, and solution B was obtained.

[0032]3) Measure Si(OC 2 h 5 ) 4 and absolute ethanol each 4.5mL, the Si(OC 2 h 5 ) 4 Added to absolute ethanol to obtain solution C.

[0033] 4) Slowly add solution C to solution B, stir well, adjust the pH value to 2~3, put it in a wat...

Embodiment 2

[0038] 1) First follow 0.02mol of Sr 1.99 MgSi 2 o 7 :0.01Tb 3+ Weigh 0.0001mol of Tb with the content of Tb 4 o 7 , put it in a beaker, add nitric acid solution with a mass concentration of 56-58% into the beaker, and stir continuously in a water bath at 60-80°C to dissolve it completely. Add deionized water to make Tb 3+ The molar concentration of 0.01mol / L is recorded as solution A.

[0039] 2) According to 0.02mol of Sr 1.99 MgSi 2 o 7 : 0.01 Tb 3+ Weigh Sr(NO 3 ) 2 0.0398mol, Mg(N0 3 ) 2 ·6H 2 O0.02mol, H 3 BO 3 0.002mol and 0.1mol of urea were added to solution A, stirred thoroughly to dissolve, and solution B was obtained.

[0040] 3) Measure Si(OC 2 h 5 ) 4 and absolute ethanol each 4.5mL, the Si(OC 2 h 5 ) 4 Added to absolute ethanol to obtain solution C.

[0041] 4) Slowly add solution C to solution B, stir well, adjust the pH value to 2~3, put it in a water bath at 60°C, take it out from the water bath when a light brown sol is formed, and c...

Embodiment 3

[0046] 1) First follow 0.02mol of Sr 1.95 MgSi 2 o 7 :0.05Tb 3+ Weigh 0.0005mol of Tb with the content of Tb 4 o 7 , put it in a beaker, add nitric acid solution with a mass concentration of 56-58% into the beaker, and stir continuously in a water bath at 70°C to dissolve it completely. Add deionized water to make Tb 3+ The molar concentration of 0.02mol / L is recorded as solution A.

[0047] 2) According to 0.02mol of Sr 1.95 MgSi 2 o 7 :0.05Tb 3+ Weigh Sr(NO 3 ) 2 0.039mol, Mg(N0 3 ) 2 ·6H 2 O0.02mol, H 3 BO 3 0.002mol and 0.4mol of urea were added to solution A, stirred thoroughly to dissolve, and solution B was obtained.

[0048] 3) Measure Si(OC 2 h 5 ) 4 4.5mL, absolute ethanol 6mL, Si(OC 2 h 5 ) 4 Added to absolute ethanol to obtain solution C.

[0049] 4) Slowly add solution C to solution B, stir well, adjust the pH value to 2~3, in a water bath at 70°C, take it out of the water bath when a light brown sol is formed, and cool it down.

[0050] 5...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
purityaaaaaaaaaa
Login to view more

Abstract

The invention relates to panchromatic fluorescent powder for a white LED (light emitting diode) and a preparation method of the panchromatic fluorescent powder. The preparation method comprises the steps of weighing a certain amount of Tb4O7 to prepare a Tb<3+> solution, recording as a solution A, weighing and adding Sr(NO3)2, Mg(NO3)2-6H2O, H3BO3 and carbamide into the solution A, fully stirring to allow Sr(NO3)2, Mg(NO3)2-6H2O, H3BO3 and carbamide to be dissolved, obtaining a solution B, adding Si(OC2H5)4 into absolute ethyl alcohol to obtain a solution C, adding the solution C into the solution B to form beige sol, naturally cooling to the room temperature after the cooled sol is burnt, obtaining precursor powder, placing the precursor powder into a muffle furnace with a reducing atmosphere, keeping warm for 2-10h, and obtaining the fluorescent powder after cooling. The prepared fluorescent powder is only doped with an active ion, and excited by the active ion to emit white light; the synthesis cost is lower; a preparation technology is simple to operate; crystals grow well; and the dispersity is good.

Description

technical field [0001] The invention relates to luminescent materials, in particular to a full-color fluorescent powder for white LEDs and a preparation method thereof. Background technique [0002] As a new type of solid light source, white LED not only overcomes the shortcomings of traditional incandescent and fluorescent lamps, such as high power consumption, fragility, and serious waste mercury pollution, but also has the advantages of environmental protection, long life, small size, and fast response. With many advantages, its appearance has opened up a new world for the human lighting industry. It is known as the fourth-generation new lighting source after incandescent lamps, fluorescent lamps, and high-intensity discharge (HID) lamps. It is the first choice for today's society that pursues a low-carbon economy. [0003] At present, there are three ways to use LED technology to achieve white light: (1) The blue light chip excites the yellow light emitted by the yellow ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
CPCY02B20/181Y02B20/00
Inventor 宁青菊乔畅君李向龙高丹鹏于成龙史永胜
Owner GOLDP ELECTRICAL APPLIANCES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap