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

Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method

A two-component, three-primary color technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as low luminous efficiency

Inactive Publication Date: 2004-03-03
PEKING UNIV
View PDF1 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The research and development of white light phosphors for GaN blue light (emission peak at 460nm) LEDs has made great progress, but its luminous efficiency is low

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
  • Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method
  • Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method
  • Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] 1. 3.9000g Al(OH) 3 , 0.4686g basic magnesium carbonate, 0.9374g barium carbonate, 0.0858g manganese acetate, 0.0440g europium oxide, and 0.2110g lithium fluoride, ground, mixed evenly, and calcined at 1300°C for 4 hours under a reducing atmosphere to obtain light blue-green Powder Ba 0.95 Mg 0.96 Al 10 o 17 :0.05Eu 2+ , 0.04Mn 2+ .

[0021] 2. 3.9000g Al(OH) 3 , 0.4989g basic magnesium carbonate, 0.9768g barium carbonate, 0.0123g manganese acetate, 0.0088g europium oxide, and 0.2110g LiF, ground, mixed evenly, and calcined at 1400°C for 3 hours under a reducing atmosphere to obtain light blue-green powder Object Ba 0.99 Mg 0.99 Al 10 o 17 : 0.01Eu 2+ , 0.01Mn 2+ .

[0022] 3. 3.9000g Al(OH) 3 , 0.3779g basic magnesium carbonate, 0.7894g barium carbonate, 0.3064g manganese acetate, 0.1760g europium oxide, and 0.2110g LiF, ground, mixed evenly, and calcined at 1500°C for 2 hours under a reducing atmosphere to obtain light blue-green powder Object Ba 0.80...

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

A laser triggered two-element three-primary-color fluorescent powder contains the blue-green powder, which is the barium magnesium aluminate activated by 2-valence Mn and 2-valence Eu and has main emission peaks in blue and green regions, and the red powder, which is the yttrium thioxide activated by 3-valuence Eu and has main emission peak in red region through proportional mixing and high-temp solid-phase reaction.

Description

Technical field: [0001] The invention relates to a fluorescent powder mixture, especially a fluorescent powder that matches the purple light emission of a semiconductor light-emitting diode (LED) to generate white light, and a preparation method. Background technique: [0002] The research and development of GaN blue light (emission peak is 460nm) LED white light phosphor has made great progress, but its luminous efficiency is low. GaN violet LEDs emitting at 390nm-400nm are currently a research hotspot. However, phosphors that absorb purple light and emit white light are difficult to obtain, so it is necessary to mix a single phosphor that absorbs purple light and emits red, green, and blue primary colors. [0003] Chinese patent application "Three-primary-color phosphor excited by purple light-emitting diodes and synthesis method" (CN1397625A, published on February 19, 2003) discloses a three-primary phosphor, the red powder is yttrium-aluminum garnet activated by europiu...

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): C09K11/80
Inventor 杨萍姚光庆段洁菲林建华
Owner PEKING UNIV
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