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Near-infrared fluorescent powder and optical device thereof

A phosphor and near-infrared technology, applied in luminescent materials, chemical instruments and methods, semiconductor devices, etc., can solve the problems of single spectral coverage, low luminous efficiency, poor continuity of emission spectrum of light-emitting devices, etc., to broaden the application field , the effect of high luminous efficiency

Active Publication Date: 2022-04-29
GRIREM ADVANCED MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a near-infrared fluorescent powder whose emission peak position is located at 870-910nm. The near-infrared fluorescent powder can be excited by blue light, purple light or visible light, especially can be matched with a blue light chip, so as to solve the problem of the near-infrared light in the prior art. Technical problems such as lack of types of phosphor materials, relatively single spectral coverage, and low luminous efficiency
Another object of the present invention is to provide a light-emitting device containing the near-infrared light-emitting material, which can realize efficient visible-near-infrared emission under the excitation of purple-blue light, so as to solve the problem of light emission in the near-infrared band in the prior art. Low efficiency, especially the emission peak wavelength position in the 870-910nm band, low luminous efficiency and poor continuity of the emission spectrum of the light-emitting device, broaden its application field

Method used

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  • Near-infrared fluorescent powder and optical device thereof
  • Near-infrared fluorescent powder and optical device thereof
  • Near-infrared fluorescent powder and optical device thereof

Examples

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preparation example Construction

[0041] The above-mentioned fluorescent powder of the present invention can preferably adopt the following preparation method provided by the application, the preparation method includes: step 1), to select from A element, D element, M element, E element, P element, Cr element and G element The elemental substance, nitride, oxide or their alloys are used as raw materials, and the raw materials are mixed to obtain a mixture; step 2), the mixture obtained in step 1) is put into a container and roasted under nitrogen or other non-oxidizing atmosphere to obtain a roasted The product, wherein the highest sintering temperature is 1000-1500° C., and the holding time is 3-15 hours; step 3), the roasted product in step 2 is sequentially crushed, washed, sieved and dried to obtain phosphor powder.

[0042] The phosphor powder excitation spectrum peak wavelength of the inorganic compound with the above composition is located at 420-480nm, and the emission peak wavelength covers the interva...

Embodiment 1

[0048] The near-infrared fluorescent powder provided by this embodiment contains a compound whose composition formula is Sc 0.8 Tb 0.1 P 3 o 9 : 0.10Cr. According to the stoichiometric ratio of the chemical formula, the oxide raw materials taken symmetrically were ground and mixed to obtain a mixture; the mixture was ground and mixed and then calcined at 1280°C for 5 hours, and the roasted product was obtained after cooling down; the obtained roasted product was After crushing, grinding, grading, sieving and washing, etc., the near-infrared phosphor intermediate can be obtained.

[0049] Utilize fluorescence spectrometer to carry out excitation, emission spectrum test to gained near-infrared sample, by the absorption of the near-infrared fluorescent powder sample prepared in this embodiment 1, emission spectrum figure is as follows Figure 1-2 shown. From Figure 1-2 It can be seen that the obtained near-infrared phosphor samples have effective absorption in the ranges o...

Embodiment 68

[0063] The light-emitting device described in this embodiment uses a semiconductor chip with a wavelength of 460nm as a light source, and the light-emitting material is a near-infrared phosphor, and the chemical formula of the near-infrared phosphor is Sc 0.64 La 0.1 Ba 0.04 Na 0.04 P 3 o 8.94 : 0.1Cr, 0.08Pr, according to the stoichiometric ratio, accurately weigh the raw materials, and grind and mix the raw materials symmetrically to obtain a mixture; pre-calcine the mixture at 800°C for 2h, then calcinate at 1200°C for 5h, and cool down Finally, a roasted product is obtained; the obtained roasted product is crushed, ground, classified, screened and washed to obtain a near-infrared fluorescent powder. In addition, in this embodiment, the Lu with emission wavelength range of 500-780nm is selected 2.94 (Al 0.8 Ga 0.2 ) 5 o 12 :0.06Ce 3+ , (Ca 0.9 Sr 0.1 ) 0.95 AlSiN 3 :0.05Eu 2+ , (Ca 0.15 Sr 0.85 ) 0.95 AlSiN 3 :0.05Eu 2+ And near-infrared phosphors (La, Y...

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Abstract

The invention relates to near-infrared fluorescent powder and an optical device thereof. The emission peak position of the near-infrared fluorescent powder is 870-910nm. The near-infrared fluorescent powder can be excited by blue light, ultraviolet light or visible light, and particularly can be matched with a blue light chip, so that the technical problems of lack of near-infrared fluorescent powder material types, relatively single spectrum coverage range, relatively low luminous efficiency and the like are solved. The near-infrared fluorescent powder can be used for preparing a light-emitting device, has the advantage of high light-emitting efficiency, and can be widely applied to numerous traditional or novel fields such as environment light sources, full-spectrum healthy illumination, medical food detection and water quality detection. In the light-emitting device, on the basis of matching with the near-infrared fluorescent powder, the visible light fluorescent powder with the emission wavelength range of 500-780 nm and the near-infrared fluorescent powder with the emission wavelength range of 950-1100 nm are used at the same time, so that the light-emitting device has higher near-infrared light-emitting intensity, more excellent emission spectrum continuity and unique application; and the application field is further widened.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a near-infrared fluorescent powder and an optical device thereof. Background technique [0002] In recent years, the application of near-infrared light sources in the fields of environmental light sources, full-spectrum health lighting, medical and food testing, and water quality testing has become the focus of the industry. Among them, near-infrared LEDs have a series of advantages due to their good directivity, low power consumption, and small size. has become the focus of international research. At present, there are only corresponding near-infrared semiconductor chips on the market that can meet the applications in the above fields. However, near-infrared chips have problems such as narrow spectrum (half-maximum width <40nm), poor tuning, high cost, and patents and technologies are monopolized by foreign countries. In the application field that requires a b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/81H01L33/50
CPCC09K11/7777C09K11/7752C09K11/7709C09K11/7778C09K11/7795H01L33/502
Inventor 高彤宇刘荣辉马小乐刘元红陈晓霞
Owner GRIREM ADVANCED MATERIALS CO LTD
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