Near-infrared fluorescent powder, preparation method of fluorescent powder and light-emitting device containing fluorescent powder

A light-emitting device and phosphor technology, applied in the field of fluorescent materials, can solve problems such as low luminous efficiency, achieve the effects of high luminous efficiency, high emission performance, and widen application fields

Active Publication Date: 2018-08-31
GRIREM ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to provide a near-infrared phosphor that can be excited by blue light, ultraviolet light, near-ultraviolet light or red light, which solves the problem of low luminous efficiency of existing near-infrared light-emitting materials. The problem;
[0007] The second technical problem to be solved by the present invention is to provide a light-emitting device containing the near-infrared phosphor, which can realize efficient emission of near-infrared light under the excitation of blue light, ultraviolet light, near-ultraviolet light or red light. Solve the problem of low luminous efficiency of existing near-infrared light-emitting devices

Method used

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  • Near-infrared fluorescent powder, preparation method of fluorescent powder and light-emitting device containing fluorescent powder
  • Near-infrared fluorescent powder, preparation method of fluorescent powder and light-emitting device containing fluorescent powder
  • Near-infrared fluorescent powder, preparation method of fluorescent powder and light-emitting device containing fluorescent powder

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The near-infrared fluorescent powder described in this embodiment, the compound composition formula that it comprises is LaGd 2 Ga 4.82 GeO 13.97 : 0.12Cr, 0.06Zn.

[0039] According to the chemical formula LaGd 2 Ga 4.82 GeO 13.97 : 0.12Cr, 0.06Zn stoichiometric ratio, accurately weighed La2 o 3 , Ga 2 o 3 、Gd 2 o 3 、GeO 2 and Cr 2 o 3 , ZnO mixed to obtain a mixture; the mixture was ground and mixed and then calcined at 1300°C for 5 hours, and the roasted product was obtained after cooling down; the obtained roasted product was subjected to post-processing such as crushing, grinding, grading, and sieve washing. Obtain near-infrared phosphor samples.

[0040] The obtained near-infrared phosphor sample was subjected to an excitation test, and the excitation and emission spectra of the sample were obtained as attached figure 1 with figure 2 shown. It can be seen from the results in the figure that the near-infrared phosphor sample can be effectively exci...

Embodiment 2

[0042] The near-infrared fluorescent powder described in this embodiment comprises a compound whose composition formula is La 1.5 Gd 1.5 Ga 4 GeO 11 : 0.5Cr.

[0043] According to chemical formula La 1.5 Gd 1.5 Ga 4 GeO 11 : 0.5Cr stoichiometric ratio, accurately weighed La 2 o 3 、Gd 2 o 3 , Ga 2 o 3 、GeO 2 and Cr 2 o 3 Mix to obtain a mixture; after the mixture is ground and mixed, it is calcined at 1200°C for 5 hours, and the roasted product is obtained after cooling down; the obtained roasted product is subjected to post-processing such as crushing, grinding, grading, and sieve washing to obtain a near-infrared Phosphor samples.

[0044] The obtained near-infrared phosphor sample was subjected to an excitation test, and the result showed that the emission peak position of the near-infrared phosphor sample was located at 780 nm when excited at 460 nm.

Embodiment 3

[0046] The near-infrared fluorescent powder described in this embodiment, the compound composition formula that it comprises is Gd 3 Ga 4 al 0.5 GeO 14 : 0.5Cr.

[0047] The preparation method of the near-infrared phosphor described in this example is the same as that in Example 2, the only difference being that, according to the chemical formula of the target compound, an appropriate amount of compound is selected for mixing, grinding, and roasting to obtain the required near-infrared phosphor material.

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Abstract

The invention belongs to the technical field of fluorescent materials, particularly relates to near-infrared fluorescent powder, and further discloses a preparation method of the fluorescent powder, and a light-emitting device containing the fluorescent powder. The near-infrared fluorescent powder comprises an inorganic compound having a composition formula of AxRrQqZy:zD, an excitation wavelengthof the compound is 200-700 nm, and the compound has broadband emission with an emission main peak of 700-1600 nm in a near-infrared light region. The near-infrared fluorescent powder provided by theinvention has a wider excitation wavelength, can well absorb ultraviolet light, blue light and red light, and has stronger near-infrared luminescence than gallium germanate system near-infrared fluorescent powder without Gd.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, and in particular relates to a near-infrared fluorescent powder, and further discloses a preparation method thereof and a light-emitting device containing the fluorescent powder. Background technique [0002] With the rise and rapid development of the modern Internet of Things, biometrics, and wearable devices, various sensors and image recognition technologies are becoming more and more important. Among these technologies, infrared LEDs have become an important auxiliary light source due to their wide application characteristics. [0003] Infrared LED, or infrared light-emitting diode, is a near-infrared light-emitting device that converts electrical energy into light energy. It has a series of advantages such as small size, low power consumption, and good directivity. It is widely used in remote control, telemetry, optical isolation, optical Switches, photoelectric control, targe...

Claims

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Application Information

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IPC IPC(8): C09K11/80C09K11/78H01L33/50
CPCC09K11/7701C09K11/7702C09K11/7769H01L33/502H01L33/505
Inventor 刘荣辉刘元红陈晓霞高彤宇马小乐
Owner GRIREM ADVANCED MATERIALS CO LTD
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