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Near-infrared phosphor and illuminating device containing the same

A light-emitting device and fluorescent powder technology, applied in the direction of light-emitting materials, electrical components, circuits, etc., can solve the problems of poor stability, low luminous efficiency, low use efficiency, etc., achieve good heat resistance and water resistance, simple preparation process, Good photostability effect

Active Publication Date: 2019-08-23
GRIREM ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, existing near-infrared light-emitting devices have the problems of low excitation efficiency and high cost of the infrared chips used.
The use of halogen lamps requires filtered light, and most of the light is split, resulting in low efficiency. At the same time, halogen lamps generate a lot of heat and cannot be applied to small devices.
However, the existing electroluminescent material devices and technologies are still immature, and there are problems of low luminous efficiency and poor stability in the infrared spectrum.

Method used

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  • Near-infrared phosphor and illuminating device containing the same
  • Near-infrared phosphor and illuminating device containing the same
  • Near-infrared phosphor and illuminating device containing the same

Examples

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Effect test

Embodiment 1

[0039] A kind of near-infrared fluorescent powder, its composition is Zn 3 Ga 1.97 GeO 8 :Ni 0.03 . Weigh ZnO, Ga according to stoichiometric ratio 2 o 3 , GeO 2 Grinding and mixing with NiO, then placing it in a crucible and calcining in air at 1300°C for 2h, taking out the fired sample, crushing, grinding, removing impurities, washing, sieving, and drying to obtain the final sample, and then the sample Optical properties are tested. The excitation and emission spectra of the samples are attached figure 2 shown, from figure 2 It can be seen that the luminescent material is effectively excited in the range of 250-320, 370-450, 500-750nm, the emission spectrum is broadband emission, the emission wavelength covers 1150-1500nm, the emission peak is at 1280nm, and the relative intensity is 120.

Embodiment 2

[0041] A kind of near-infrared fluorescent powder, its composition is Zn 2 MgGa 1.94 Ni 0.03 GeO 8 :Yb 0.03 . Weigh ZnO, MgO, Ga according to stoichiometric ratio 2 o 3 , GeO 2 , NiO and Yb 2 o 3 Calcined at 1300°C for 2h after grinding and mixing. The burnt samples are taken out, crushed, ground, impurity removed, washed, sieved, and dried to obtain the final samples, and then the optical properties of the samples are tested. Under the excitation of 460nm, the emission spectrum of the luminescent material is broadband emission, the main emission peak is located at 1271nm, and the relative intensity is 113.

Embodiment 3

[0043] A kind of near-infrared fluorescent powder, its composition is Zn 2 Ga 1.94 Ni 0.03 GeO 7 :Yb 0.03 . Weigh ZnO, Ga according to stoichiometric ratio 2 o 3 , GeO 2 , NiO and Yb 2 o 3 Calcined at 1300°C for 2h after grinding and mixing. The burnt samples are taken out, crushed, ground, impurity removed, washed, sieved, and dried to obtain the final samples, and then the optical properties of the samples are tested. Under the excitation of 460nm, the emission spectrum of the luminescent material is broadband emission, the main emission peak is located at 1277nm, and the relative intensity is 111.

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Abstract

The invention belongs to the technical field of luminescent materials, in particular relates to near-infrared phosphor, and relates to an illuminating device containing the phosphor. The near-infraredphosphor comprises an inorganic compound of the formula AxRpQqOr:Dy, wherein A is one or two of Zn, Ca, Mg, Sr and Ba elements, R is one or two of Ga, Al and B elements, Q is one or two of Ge and Sielements, D is one or two of Ni and Yb elements, and must contain the Ni element, 2<=x<=4, 1.5<=p<=2.5, 0.8 <= q <= 1.2, 6 <= r <= 10, 0.0001 <= y <= 0.2. The compound has the same crystal structure as spinel ZnGa2O4. The luminescent material can be efficiently emitted in a near-infrared region (1250-1300 nm), and is an ideal near-infrared luminescent material, and the illuminating device containing the phosphor can be widely applied to night vision monitoring, biological analysis sensing systems and Fields such as biological imaging systems.

Description

technical field [0001] The invention belongs to the technical field of light-emitting materials, and in particular relates to a near-infrared fluorescent powder and a light-emitting device containing the fluorescent powder. Background technique [0002] With the rise of the Internet of Things, biometrics, and wearable devices, various sensors and image recognition technologies are becoming more and more important. Infrared LED has a wide range of application characteristics, making it an important auxiliary light source. By combining sensing devices and recognition technology, it can be applied to special applications such as iris recognition and face recognition. Or it can be applied to biosensors of wearable devices, which can quantify the physiological state of the human body and become a new tool for health management. Infrared LEDs are getting a lot of attention given the surge in penetration of infrared LEDs in smartphones, automobiles, surveillance systems and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66C09K11/78H01L33/50
CPCH01L33/502C09K11/66C09K11/77C09K11/662C09K11/7707C09K11/666C09K11/625
Inventor 刘元红刘荣辉陈明月陈晓霞邵冷冷
Owner GRIREM ADVANCED MATERIALS CO LTD
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