Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Vanadate green emitting phosphor as well as preparation method and application thereof

A technology of green phosphor and vanadate, which is applied in the field of ultraviolet-near ultraviolet white light LED, can solve the problems of self-activated vanadate green phosphor, which has not been disclosed, affects the light emission of phosphor, and production restrictions, etc., and achieves high Crystallinity and visible light transmittance, wide application prospects, easy-to-handle effect

Inactive Publication Date: 2013-05-22
ANHUI XINDE CHEM FIBER
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this type of phosphor needs to be in H 2 +N 2 , CO and other reducing atmospheres, during the synthesis process H 2 +N 2 Reducing gases such as CO and CO cannot completely penetrate into the synthesized phosphor powder, so that the activated ions of the phosphor cannot be fully reduced to Eu 2+ , which seriously affects the luminescence of the phosphor; also because the CO gas used for reduction is poisonous, H 2 +N 2 Reducing gas is dangerous, improper operation can cause explosion, therefore, its production is subject to certain restrictions
[0005] At present, self-activated vanadate green phosphors matching with near-ultraviolet white LEDs have not been published or reported.

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
  • Vanadate green emitting phosphor as well as preparation method and application thereof
  • Vanadate green emitting phosphor as well as preparation method and application thereof
  • Vanadate green emitting phosphor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Preparation of Sr 6 V 2 o 11

[0033] According to the chemical formula Sr 6 V 2 o 11 The stoichiometric ratio of each element in SrCO3 was weighed separately 3 : 4.429 g, ammonium metavanadate NH 4 VO 3 : 1.17 g, after grinding and mixing in an agate mortar, select the air atmosphere for the first calcination, the temperature is 400 ° C, the calcination time is 7 hours, then cool to room temperature, take out the sample; the raw material calcined for the first time is fully Mix and grind evenly, sinter again in air atmosphere, temperature 500°C, calcination time 8 hours, then cool to room temperature, take out the sample; finally it is fully ground again and placed in a muffle furnace for air sintering, the calcination temperature is 900°C, The calcining time is 6 hours, and the powdery vanadate green luminescent material is obtained.

[0034] See attached figure 1 , which is the X-ray powder diffraction pattern of the sample prepared by the technical scheme o...

Embodiment 2

[0039] Preparation of Sr 6 V 2 o 11

[0040] According to the chemical formula Sr 6 V 2 o 11 The stoichiometric ratio of each element in SrCO3 was weighed separately 3 : 4.429 g, vanadium pentoxide V 2 o 5 : 0.910 g, after being ground and mixed in an agate mortar, select the air atmosphere for the first calcination, the temperature is 450 ° C, the calcination time is 3 hours, then cooled to room temperature, and the sample is taken out; the raw material calcined for the first time is fully Mix and grind evenly, sinter again in air atmosphere, temperature 500°C, calcination time 7 hours, then cool to room temperature, take out the sample; finally it is fully ground again and placed in a muffle furnace for air sintering, the calcination temperature is 850°C, The calcining time is 4 hours, and the powdery vanadate green luminescent material is obtained. Its main structural properties, excitation spectrum, luminescence spectrum and decay curve are similar to those of Exa...

Embodiment 3

[0042] Preparation of Sr 6 V 2 o 11

[0043] According to the chemical formula Sr 6 V 2 o 11 The stoichiometric ratio of each element in the weighted strontium oxide SrO: 3.109 grams, vanadium pentoxide V 2 o 5 : 0.910 g, after grinding and mixing in an agate mortar, select the air atmosphere for the first calcination, the temperature is 300 ° C, the calcination time is 8 hours, then cool to room temperature, take out the sample; the raw material for the first calcination is fully Mix and grind evenly, then sinter again in air atmosphere, the temperature is 450°C, the calcination time is 6 hours, then cool to room temperature, take out the sample; finally it is fully ground again and placed in the muffle furnace for air sintering, the calcination temperature is 700°C, The calcining time is 7 hours, and the powdery vanadate green luminescent material is obtained. Its main structural properties, excitation spectrum, luminescence spectrum and decay curve are similar to th...

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

No PUM Login to View More

Abstract

The invention relates to vanadate green emitting phosphor as well as a preparation method and application thereof and belongs to the technical field of an inorganic luminescent material. The green emitting phosphor is vanadate with alkaline earth metal Sr<2+> serving as positive ions, has the chemical formula of Sr6V2O11, and is prepared by a high-temperature solid-phase method or a chemical solution method. The green emitting phosphor emits green fluorescence with the central wavelength of 495-570 nanometers under the excitation of ultraviolet with the wavelength of 250-490 nanometers and blue lights and has high luminescent intensity and good stability; and the excitation of near-ultraviolet lights of the green emitting phosphor coincides with the emission wavelength of a near-ultraviolet semiconductor chip very well, and therefore, the vanadate green emitting phosphor can serve as near-ultraviolet light excitated phosphor powder for white LEDs (Light Emitting Diodes). The preparation method for the anadate with the alkaline earth metal Sr<2+> serving as the positive ions is simple; and according to the preparation method, other rare earth or transition metals do not need to be doped to serve as activating agents, calcination temperature is low, repeatability is good, product quality is stable, and operation and industrial production are easy.

Description

technical field [0001] The invention relates to an inorganic fluorescent light-emitting material, in particular to a fluorescent powder emitting green fluorescence under near-ultraviolet light excitation, which can be applied to ultraviolet-near ultraviolet white light LEDs and belongs to the technical field of inorganic light-emitting materials. Background technique [0002] Light-emitting diode (LED), as the fourth-generation light source, is regarded by many researchers as a new lighting source in the 21st century. Due to the advantages of high luminous efficiency, long life, low energy consumption, and no pollution to the environment, phosphor-converted white LEDs have recently been widely used in backlighting and general lighting of displays such as televisions, cameras, computers, mobile phones, and game consoles. Phosphor powder, as an important part of white LEDs, is of great significance for improving the performance indicators such as luminous efficiency, service l...

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): C09K11/69C01G31/00H01L33/50
CPCY02B20/181Y02B20/00
Inventor 黄彦林陶正旭关莹秦琳袁蓓玲韦之豪徐传艳
Owner ANHUI XINDE CHEM FIBER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com