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Broad-band near-infrared-emission luminous material and luminous device comprising luminous material

A technology of light-emitting substances and light-emitting devices, applied in the directions of light-emitting materials, semiconductor devices, electrical components, etc., can solve the problems of narrow emission spectral range, long fluorescence lifetime, weak luminous intensity, etc., and achieve high-quality application effects and short fluorescence lifetime. Effect

Active Publication Date: 2018-11-23
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] For this reason, the technical problem to be solved by the present invention is to provide a broad-band emission near-infrared luminescent substance, which has the ability to be excited by a spectrum with a rich wavelength range (ultraviolet or violet or blue light) to produce extremely broad red light and The emission performance of the near-infrared spectrum (650nm-1600nm) solves the problems of weak luminous intensity, long fluorescence lifetime and narrow emission spectral range of single-component luminescent materials in the prior art;

Method used

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  • Broad-band near-infrared-emission luminous material and luminous device comprising luminous material
  • Broad-band near-infrared-emission luminous material and luminous device comprising luminous material
  • Broad-band near-infrared-emission luminous material and luminous device comprising luminous material

Examples

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Embodiment 1

[0058] The broad-band emitting near-infrared luminescent substance described in this embodiment contains a compound whose composition formula is La 3 f 0.998 Ga 5 o 14 : 0.002Cr.

[0059] According to chemical formula La 3 f 0.998 Ga 5 o 14 : 0.002Cr stoichiometric ratio, accurate weighing of raw material La 2 o 3 , HfO 2 , Ga 2 o 3 and Cr 2 o 3 , grind and mix the above raw materials into a crucible, and sinter at 950°C for 10 hours in a high-temperature furnace under an air atmosphere; cool to room temperature with the furnace, then pulverize the sample and sinter in a nitrogen / hydrogen mixed gas atmosphere, The sintering temperature is 1400° C., and the sintering time is 10 hours. The sample is ball milled, washed with water and sieved to obtain the required broadband emitting near-infrared luminescent material.

[0060] Utilize X-ray diffraction to analyze the fluorescent material obtained in embodiment 1, obtain its X-ray diffraction pattern, as figure 1 sh...

Embodiment 2

[0063] The broad-band emitting near-infrared luminescent substance described in this embodiment contains a compound whose composition formula is La 2.8 f 0.9 Al 5.2 o 13.95 : 0.1Cr.

[0064] According to chemical formula La 2.8 f 0.9 Al 5.2 o 13.95 : 0.1Cr stoichiometric ratio, accurate weighing of raw material La 2 o 3 , HfO 2 、Al 2 o 3 and Cr 2 o 3 , Grind and mix the above raw materials into a crucible, sinter in a high-temperature furnace under air at 950°C for 10 hours, cool to room temperature with the furnace, then crush the sample and sinter in a nitrogen / hydrogen mixed gas, the sintering temperature is 1400 ℃, the sintering time is 10 hours, and the sample is ball milled, washed with water and sieved to obtain the required broadband emitting near-infrared luminescent material.

[0065] Utilize fluorescence spectrometer to analyze the fluorescent material that obtains in embodiment 2, excite in blue light 450nm, obtain its excitation spectrogram, as Fig...

Embodiment 3-14

[0067] For the broad-band emitting near-infrared luminescent substances described in Examples 3-14, the composition formulas of their compounds are listed in Table 1 below. According to the chemical formula composition of the target compound, an appropriate amount of compound is selected for mixing, grinding, and roasting to obtain the required broadband emitting near-infrared luminescent substance. The properties of the luminescent substances prepared in each embodiment were tested, and the test results are shown in Table 1 below.

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Abstract

The invention belongs to the technical field of luminous materials, and particularly relates to a broad-band near-infrared-emission luminous material, in particular to a material capable of emitting red rays and near-infrared rays within 650nm to 1,600nm under excitation of ultraviolet, violet, blue and red rays, and further discloses a preparation method of the luminous material and a luminous device comprising the luminous material. The broad-band near-infrared-emission luminous material is prepared from an inorganic compound with the molecular formula of AaDbMcOe:xCr, has a strictly occupied ordered structure, and has a broader excitation wavelength (250-700 nm); the material is a single substance which takes Cr as an optically active center, and can well absorb the ultraviolet rays, the blue rays and the red rays; under the excitation of the ultraviolet rays, the violet rays or the blue rays, the broad-band red rays and the near-infrared rays can be emitted within the range of 650nm to 1,600 nm.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a broad-band emitting near-infrared luminescent material, in particular to a kind of red light in the range of 650nm-1600nm and near-infrared emission that can be excited by ultraviolet, purple, blue, and red light. material, and further discloses a preparation method thereof, and a light-emitting device comprising the light-emitting material. Background technique [0002] In the field of chemical detection, since the red light in the range of 650nm-1600nm and the near-infrared region cover the combined frequency of hydrogen-containing groups (O-H, N-H, C-H) The near-infrared spectrum of the sample can analyze the characteristic information of the hydrogen-containing groups of the organic molecules in the sample, which has positive significance for the structural identification and analysis of chemical substances. Moreover, the use of near-infrared spec...

Claims

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Application Information

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IPC IPC(8): C09K11/78C09K11/80H01L33/50
CPCC09K11/7708C09K11/7776H01L33/502
Inventor 解荣军刘荣辉曾华涛周天亮刘元红
Owner XIAMEN UNIV
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