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Near-infrared phosphor, preparation method thereof, and light-emitting device

A technology for light-emitting devices and phosphors, applied in the field of phosphors, can solve the problems of limited application and low excitation efficiency of infrared phosphors by ultraviolet rays, and achieve the effects of long service life, improved stability and quantum efficiency, and low cost.

Active Publication Date: 2021-07-20
XUYU OPTOELECTRONICSSHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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  • Near-infrared phosphor, preparation method thereof, and light-emitting device
  • Near-infrared phosphor, preparation method thereof, and light-emitting device
  • Near-infrared phosphor, preparation method thereof, and light-emitting device

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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 in proportion, at 1400°C, under a 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.

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Abstract

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. Among them, the chemical general formula of the near-infrared phosphor is A 1‑ y MgM 10‑x‑z R x o 17‑x N x :yEu 2+ , zCr 3+ ; wherein, the A site includes at least one of Ca, Sr, and Ba, the M site includes at least one of Al, Ga, and Sc, and the R site includes at least one of Si, Ge, and Sn, 0≤y≤0.05 , 0≤x≤3, 0.01≤z≤0.1. The near-infrared fluorescent powder of the present application has high ultraviolet excitation efficiency, good luminescence stability, high quantum efficiency, long service life and wide 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, laser radar, 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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C09K11/66C09K11/80
CPCC09K11/0883C09K11/7736C09K11/7794
Inventor 陈磊林金填吴宇田琪黎学文蔡济隆
Owner XUYU OPTOELECTRONICSSHENZHEN CO LTD