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

Stable red fluorescent material, its preparation method and method for enhancing luminescent efficiency

A technology of red fluorescence and white light, which is applied in the direction of luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of application limitations, unstable chemical properties of sulfide, etc., and achieve simple synthesis methods, enhanced stability and fluorescence intensity, easy-to-prepare effects

Inactive Publication Date: 2011-09-28
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, although Y2O3S:Eu3+ is also used as red fluorescent material, due to the unstable chemical properties of sulfide, etc. Inherent defects, resulting in its application is still limited

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
  • Stable red fluorescent material, its preparation method and method for enhancing luminescent efficiency
  • Stable red fluorescent material, its preparation method and method for enhancing luminescent efficiency
  • Stable red fluorescent material, its preparation method and method for enhancing luminescent efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0038] According to a preferred embodiment of the present invention, the present invention provides a borate red fluorescent material for white light LEDs, the chemical composition of the borate red fluorescent material is:

[0039] Na 3 Ca 1-x B 5 o 10 :xEu 3+

[0040] Among them, Na 3 Ca 1-x B 5 o 10 as matrix, Eu 3+ is the doped rare earth ion, x is the molar amount of the doped rare earth ion, 0.005≤x≤0.3. Further, it is preferred that the molar amount x of doped rare earth ions is: 0.008, 0.01, 0.015, 0.02, 0.04, 0.06, 0.08, 0.10, 0.15, 0.20 and 0.25.

[0041] According to another preferred embodiment of the present invention, the borate red fluorescent material further includes charge compensation ions M + , and its chemical composition formula is:

[0042] Na 3 Ca 1-2x B 5 o 10 :xEu 3+ , xM +

[0043] where M + is the monovalent alkali metal ion Li + 、Na + and K + One or more of, x is the doped rare earth ion Eu 3+ or the charge compensating ion ...

Embodiment 1

[0058] Embodiment 1: fluorescent material Na 3 Ca 0.8 B 5 o 10 :0.2Eu 3+ preparation of

[0059] Calcium carbonate (CaCO 3 )0.4504g, anhydrous sodium carbonate (Na 2 CO 3 ) 0.795g, boric acid (H 3 BO 3 ) 1.5475g and europium oxide (Eu 2 o 3 ) 0.176g. After the above raw materials were ground and mixed in an agate mortar, they were put into a corundum crucible and pre-calcined at a temperature of 400°C for 2 hours. Then the pre-calcined powder is cooled, taken out and ground. Then calcined again at a temperature of 750° C. for 10 hours, and after cooling, ground again until pulverized and sieved to obtain the fluorescent material Na 3 Ca 0.8 B 5 o 10 :0.2Eu 3+ .

[0060] Adopt Japan Shimadzu XRD-6000 type X-ray polycrystal diffractometer (radiation source is Cu target K α , 40kV, 30mA, λ=0.15406nm, step size 0.02, scan range 10°~70°), measure the X-ray diffraction pattern of the prepared fluorescent material sample, the result is as follows figure 1 shown. ...

Embodiment 2

[0063] Embodiment 2: fluorescent material Na 3 Ca 0.995 B 5 o 10 :0.005Eu 3+ preparation of

[0064] Calcium carbonate (CaCO 3 )0.5005g, anhydrous sodium carbonate (Na 2 CO 3 ) 0.795g, boric acid (H 3 BO 3 ) 1.5475g and europium oxide (Eu 2 o 3 ) 0.0044g. After the above raw materials were ground and mixed in an agate mortar, they were put into a corundum crucible and pre-calcined at a temperature of 400°C for 2 hours. Then the pre-calcined powder is cooled, taken out and ground. Then calcined again at a temperature of 750°C for 10 hours, and after cooling, ground again until pulverized to obtain the fluorescent material Na 3 Ca 0.995 B 5 o 10 :0.005Eu 3+ .

[0065] Same as Example 1, the X-ray diffraction test shows that the prepared fluorescent material is a single crystal phase. The excitation and emission spectra of the prepared red fluorescent materials were tested on a HITACHI F-7000 fluorescence spectrometer. The borate red fluorescent material is ex...

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
The average particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a stable red fluorescent material, its preparation method and a method for enhancing luminous efficiency. The stable red fluorescent material is a novel borate red fluorescent material used for white light LEDs, the chemical composition of the stable red fluorescent material is Na3Ca1-2xB5O10 : xEu<3+>, xM<+>, wherein the Na3Ca1-2xB5O10 is taken as a matrix, Eu<3+> is takenas a doped rare earth ion, M<+> is a charge compensation ion and is one or more of alkali metal ions Li<+>, Na<+>, K<+>, wherein 0.05<=x<=0.3. According to the invention, the borate red fluorescent material Na3Ca1-2xB5O10: xEu<3+>, xM<+> is synthesized by a two-step calcining method, the prepared borate red fluorescent material is capable of being excited by purple light LEDs or blue light LEDs of 200 to 470 nm, and the stable red light with high strengths ranged from 580 to 630 nm is emitted. The borate red fluorescent material is used for white light LEDs excited by blue light, ultraviolet light or near ultraviolet light.

Description

technical field [0001] The invention relates to a stable red fluorescent material for white LEDs, a preparation method thereof, and a method for enhancing luminous efficiency. Specifically, the present invention relates to a borate red fluorescent material for white LEDs suitable for exciting 580-630nm red light in the blue, ultraviolet and near-ultraviolet light regions and a preparation method thereof, and the use of the borate red fluorescent material to enhance white light The method of LED luminous efficiency. Background technique [0002] Light-emitting diode (light-emitting diode) is a new type of device, which has the characteristics of small size, low calorific value, low power consumption, long life and fast response, and is easy to develop into miniaturized products. It can be widely used in Various lighting facilities or display panels, including indoor traffic lights, traffic lights, street lights, taillights for automobiles, large outdoor screens, display scre...

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
IPC IPC(8): C09K11/78H01L33/50
Inventor 孙家跃杜海燕赖金丽
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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