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

Preparation method of downconversion fluorescent material

A fluorescent material and fluorescent powder technology, which is applied in the field of preparation of down-conversion fluorescent materials

Inactive Publication Date: 2013-03-20
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI +1
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct bandgap semiconductor materials generally have a higher absorption cross section, but it is more difficult to achieve multiple transitions in the middle, that is, there are one or more deep energy levels in the middle of the bandgap and a higher emission cross section.

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
  • Preparation method of downconversion fluorescent material
  • Preparation method of downconversion fluorescent material
  • Preparation method of downconversion fluorescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] see figure 1 As shown, the present invention provides a kind of preparation method of down conversion fluorescent material for the first time, comprises the steps:

[0014] Step 1: Take a general chemical formula as Phosphor powder or raw materials for preparing the phosphor powder. In the experiment, a chemical formula (Sr 0.6 Ba 0.4 ) 2 SiO 4 :Eu 2+ Green phosphor, its emission spectrum and excitation spectrum are as follows figure 2 shown.

[0015] Step 2: Add Yb to the phosphor powder 3+ powder. where Yb 3+ The powder material is YbF 3 or Yb 2 o 3 , YbF was used in the experiment 3 A powder whose size is comparable to that of a phosphor.

[0016] Step 3: Mix and stir well. In the experiment, the phosphor and YbF 3 Put it into an agate mortar and add an appropriate amount of ethanol to grind and mix well;

[0017] Step 4: Sintering. Sintering methods include high-temperature solid-phase method, combustion method, sol-gel method, precipitation met...

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 a preparation method of a downconversion fluorescent material, which comprises the following steps: 1, selecting fluorescent powder which has a chemical general formula shown in the specification or preparing raw materials of the fluorescent powder; 2, adding powder containing Yb<3+> into the fluorescent powder; 3, evenly mixing and stirring; and 4, sintering to form the downconversion fluorescent material which has a chemical general formula shown in the specification. According to the invention, the quantum cutting effect can be achieved, and the quantum efficiency can exceed 100%.

Description

technical field [0001] The invention relates to the technology of solid material luminescence, in particular to a preparation method of down-conversion fluorescent material, which can convert one photon of 200nm-500nm into multiple photons of 500nm-1100nm, and improve the technology of luminous efficiency. Background technique [0002] With the continuous expansion of energy demand, green energy will play an increasingly important role. Solar energy is currently a truly green and sustainable energy source, and solar cells are one of the best means to utilize solar energy. However, there is still a problem with solar cells at present that the efficiency is low, so how to improve the efficiency of solar cells is an urgent problem to be solved. question. For monocrystalline silicon cells, Martin Green (M.A.Green) proposed that the limit of cell efficiency can be increased from 31% to 40% under ideal conditions through wavelength down conversion. Therefore, the study of down-c...

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): C09K11/59C09K11/80C09K11/61
Inventor 李乐良郑军左玉华成步文王启明郑智雄
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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