US 11,299,672 B2 · Near-infrared luminescent material and light-emitting device prepared therefrom

Abstract

The near-infrared luminescent material is capable of efficiently emitting near-infrared light with a peak wavelength of 900 nm to 1,100 nm under an effective excitation wavelength of 250 nm to 750 nm. The luminescent material has the characteristics of wide excitation emission wavelength, high luminous efficiency, uniform luminescence, no impurity phase, high stability, simple preparation and the like. The present invention further provides the light-emitting device prepared from the near-infrared luminescent material. The luminescent material and the light-emitting device provided by the present invention solve the problems of poor stability, low luminous efficiency, high preparation cost and the like of a conventional near-infrared luminescent material and light-emitting device, and have a favorable application prospect.

Claims20

Dependent claims

A near-infrared luminescent material, comprising an inorganic compound with a chemical formula of RuQvOw:Crx, Yby, wherein

R is at least one of Y, Lu and Tb;
Q is Ga and/or Al;
and
the parameters u, v, w, x and y meet the following conditions:
2.5≤u≤3.5, 3.5≤v≤5.5, 11.25≤w≤13.25, 0.02≤x≤0.30, and 0.02≤y≤0.30;
the near-infrared luminescent material is garnet structure;
the near-infrared luminescent material has a peak-peak intensity A in an emission spectrum within the range of 900 nm to 1,100 nm, and a peak-peak intensity B in an emission spectrum within the range of 700 nm to 750 nm, wherein 0.95≤A/(A+B)≤0.99.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/612,315Filed 13 Sep 2018

Priority

CN 201810147400.312 Feb 2018

Published

US 2020/0362239 A119 Nov 2020

Granted

12 Apr 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C09K 11/06
Luminescent materials, e.g. electroluminescent or chemiluminescent: containing organic luminescent materials
C09K 11/7776
Containing two or more rare earth metals: vanadates; Chromates; Molybdates; Tungstates
H10H 20/8512
Characterised by their material, e.g. binder: wavelength conversion materials
H10H 20/8513
Wavelength conversion materials: having two or more wavelength conversion materials

Near-infrared luminescent material and light-emitting device prepared therefrom

Life of this patent

Near-infrared luminescent material and light-emitting device prepared therefrom

Life of this patent

Abstract

Claims20