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

Fluorescent powder and preparation method thereof, and luminescent device

A phosphor and luminophore technology, applied in luminescent materials, semiconductor devices, chemical instruments and methods, etc., can solve the problems of lack of spectrum, high intensity of high-energy blue light, and great harm, and achieve uniform distribution of elements, controllable operation, emission Strength boosting effect

Inactive Publication Date: 2021-12-21
XUYU OPTOELECTRONICSSHENZHEN CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to provide a fluorescent powder, a preparation method and a light-emitting device, aiming at solving the problem of high-energy blue light obtained by using a blue light chip to excite the fluorescent powder in the implementation process of white light LEDs in the prior art, which is highly harmful and lacks spectrum problem

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
  • Fluorescent powder and preparation method thereof, and luminescent device
  • Fluorescent powder and preparation method thereof, and luminescent device
  • Fluorescent powder and preparation method thereof, and luminescent device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The second aspect of the embodiment of the present application provides a method for preparing a phosphor, including the following steps:

[0042] S01. According to chemical formula R 2x m 3-3x-z Ti x-y Si (6-6x) f 6x N 11-11x :yMn 4+ , zCe 3+ For the stoichiometric ratio of the elements shown, in a reducing atmosphere, the M nitride or M-Si alloy and the Ce oxide or nitride are mixed and sintered in proportion, and then post-treated to obtain a precursor;

[0043] S02. Carrying out the first mixing treatment of the precursor and the organic solution of hydrofluoric acid to obtain the first mixture;

[0044] S03. Carry out the second mixing treatment of the first mixture with Ti metal or Ti fluoride, R oxide or fluoride or carbonate, and Mn metal according to the chemical formula, and then perform drying treatment to obtain the phosphor powder shown in the chemical formula, In the formula, R is selected from at least one element among Li, Na, and K, and M is sel...

Embodiment 1

[0065] A kind of fluorescent powder and preparation method thereof

[0066] A kind of fluorescent powder, which is used for long-wave blue light excitation, and the chemical formula of the fluorescent powder is R 2x m 3-3x-z Ti x-y Si (6-6x) f 6x N 11-11x :yMn 4+ , zCe 3+ , in the formula, R is selected from K, M is selected from La; and, the value ranges of x, y, z are: x=0.1, y=0.005, z=0.001; the obtained phosphor is: R 0.2 m 2.699 Ti 0.095 Si 5.4 f 0.6 N 9.9 :0.005Mn 4+ ,0.001Ce 3+ .

[0067] The preparation method of the provided fluorescent powder comprises the following steps:

[0068] Provide a reducing atmosphere containing C, and weigh a certain amount of La-Si alloy, GeO 2 Carry out sintering treatment at 1600°C for 8 hours in a high-temperature furnace, and carry out crushing and washing treatment to obtain the precursor;

[0069] performing the first mixing treatment on the precursor and the acetone solution of hydrofluoric acid at 60° C. for 1 ho...

Embodiment 2-18

[0072] A fluorescent powder, the chemical formulas are shown in Table 1 below, and its preparation method is the same as that of Example 1.

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 the technical field of inorganic luminescent materials, in particular to fluorescent powder and a preparation method thereof, and a luminescent device. The chemical formula of the provided fluorescent powder is R<2x>M<3-3x-z>Ti<x-y>Si<6-6x>F<6x>N<11-11x>: yMn<4+>, zCe<3+>. In the formula, R is at least one element selected from Li, Na and K; M is at least one element selected from La, Lu and Y; and the value ranges of x, y and z meet the conditions that x is larger than or equal to 0.1 and smaller than or equal to 0.9, y is larger than or equal to 0.005 and smaller than or equal to 0.2, and z is larger than or equal to 0.001 and smaller than or equal to 0.1. The obtained fluorescent powder has large absorption and excitation effects on long-wave blue light; the fluorescent powder can be efficiently excited under the long-wave blue light; and the advantages of nitride broadband fluorescent powder and fluoride narrow-band fluorescent powder are effectively combined, white light of various color temperatures can be achieved under excitation of the long-wave blue light, and the fluorescent powder has very important significance on LED light health.

Description

technical field [0001] The application belongs to the technical field of inorganic light-emitting materials, and in particular relates to a fluorescent powder, a preparation method and a light-emitting device. Background technique [0002] White LEDs have the advantages of high luminous efficiency, low energy consumption, long life, and no pollution, and have been widely used in the fields of lighting and display. With the rapid development of high-quality lighting and display, LED has higher and higher requirements for light health while pursuing light efficiency and color rendering index. In the process of realizing white light LED, 440-460nm blue light chips are usually used to excite phosphors, but this method has high intensity of high-energy blue light, which is easy to damage the retina of the eyes, and the blue light is more harmful, and there is a lack of spectrum around 480nm in the process of realizing white light. It is easy to cause rhythm disorder in lighting....

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): C09K11/85H01L33/50
CPCC09K11/77747H01L33/502Y02B20/00
Inventor 陈磊林敏怡张宇黎学文杜甫林金填
Owner XUYU OPTOELECTRONICSSHENZHEN CO LTD
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