Unlock instant, AI-driven research and patent intelligence for your innovation.
Near-infrared fluorescent powder, preparation method thereof and light-emitting device
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A light-emitting device and phosphor technology, applied in the field of phosphor, can solve the problems of limited application, low efficiency of infrared phosphor excitation by ultraviolet light, etc., and achieve the effects of long service life, low cost, and high excitation efficiency by ultraviolet light
Active Publication Date: 2021-02-05
XUYU OPTOELECTRONICSSHENZHEN CO LTD
View PDF4 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] The purpose of this application is to provide a near-infrared phosphor and its preparation method, as well as a light-emitting device, aiming to solve the technical problem that the existing infrared phosphor has low excitation efficiency by ultraviolet rays and limits its application to a certain extent.
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0033] The second aspect of the embodiment of the present application provides a method for preparing a near-infrared phosphor, including steps:
[0034] S10. According to the ratio of each element in the near-infrared phosphor, after mixing the precursor of A, the precursor of Mg, the precursor of M and the precursor of Eu, perform the first sintering treatment to obtain the intermediate;
[0035] S20. After crushing the intermediate body, mix it with the precursors of R and Cr, perform a second sintering treatment, and crush to obtain a near-infrared phosphor.
[0036] The preparation method of the near-infrared fluorescent powder provided by the second aspect of the application, according to the general chemical formula A of the near-infrared fluorescent powder 1- y MgM 10-x-z R x o 17-x N x :yEu 2+ , zCr 3+ In , the proportion of each element is used to obtain the precursor of each element. Then, first mix the precursor of A, the precursor of Mg, the precursor of M...
Embodiment 1
[0045] A kind of near-infrared fluorescent powder, its chemical formula is: (Ba, Sr) 1-y Mg(Al, Ga) 10-x-z Si x o 17-x N x :yEu 2+ , zCr 3 + , Ba / Sr ratio 1:1, Al / Ga ratio 5:1, y=0.035, x=2.5, z=0.05.
[0046] Its preparation method comprises steps:
[0047] ①According to the ratio of elements in the chemical formula of the phosphor powder above, after mixing the A-site oxide, Mg oxide, M-site oxide and Eu oxide according to the proportion, at 1400°C, under the mixed atmosphere of nitrogen and hydrogen, Sintering for 4-6h to prepare the intermediate;
[0048] ②Crush the intermediate, mix it with the nitride at the R site and the oxide at the Cr site, sinter at 1600°C in a mixed atmosphere of nitrogen and hydrogen for 4-6 hours, and finally form the target near-infrared after crushing, washing, and sieving Phosphor.
Embodiment 2
[0050] A kind of near-infrared fluorescent powder, its chemical formula is: (Ba, Sr) 1-y Mg(Al, Ga) 10-x-z Si x o 17-x Nx :yEu 2+ , zCr 3 + , Ba / Sr ratio 2:1, Al / Ga ratio 6:1, y=0.035, x=2.5, z=0.05.
[0051] Its preparation method is with embodiment 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
Property
Measurement
Unit
particle diameter
aaaaa
aaaaa
Login to View More
Abstract
The invention belongs to the technical field of fluorescent powder, and particularly relates to near-infrared fluorescent powder, a preparation method thereof and a light-emitting device. The generalchemical formula of the near-infrared fluorescent powder is A<1-y>MgM<10-x-z>R<x>O<17-x>N<x>: yEu<2+>, zCr<3+>, wherein the A position comprises at least one of Ca, Sr and Ba, the M position comprisesat least one of Al, Ga and Sc, the R position comprises at least one of Si, Ge and Sn, y is greater than or equal to 0 and less than or equal to 0.05, x is greater than or equal to 0 and less than orequal to 3, and z is greater than or equal to 0.01 and less than or equal to 0.1. The near-infrared fluorescent powder is high in ultraviolet excitation efficiency, good in light-emitting stability,high in quantum efficiency, long in service life and wide in application range.
Description
technical field [0001] The application belongs to the technical field of fluorescent powder, and in particular relates to a near-infrared fluorescent powder, a preparation method thereof, and a light emitting device. Background technique [0002] In recent years, with the rapid development of near-infrared spectroscopy technology in the fields of facial recognition, iris recognition, security monitoring, laserradar, health detection, 3D sensing and other fields, infrared LEDs are also due to their good directivity and large penetration depth. , less interference, low power consumption, and small size have become the focus of international research. [0003] At present, the technology to realize LED near-infrared emission is mainly obtained through infrared chips, but this technology is expensive, immature, and the half-peak width of the emission wavelength is narrow, and its application is limited to the fields of tube emission and security. Another technology to realize 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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More