Broad-band near-infrared emission luminescent substance and luminescent device containing the same

A technology of light-emitting substances and light-emitting devices, applied in the directions of light-emitting materials, electric solid devices, semiconductor devices, etc., can solve the problems of narrow emission spectral range, long fluorescence lifetime, weak luminous intensity, etc. Effect

Active Publication Date: 2018-11-30
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 material, 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 (700nm-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 luminescent substance and luminescent device containing the same
  • Broad-band near-infrared emission luminescent substance and luminescent device containing the same
  • Broad-band near-infrared emission luminescent substance and luminescent device containing the same

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 Ca 3 Ta 0.98 Ga 3 Si 2 o 13.98 : 0.02Cr.

[0059] According to the chemical formula Ca 3 Ta 0.98 Ga 3 Si 2 o 13.98 : 0.02Cr stoichiometric ratio, accurate weighing of Ga 2 o 3 、 Ta 2 o 5 , CaCO 3 , SiO 2 、Cr 2 o 3 Raw materials, grind and mix the above raw materials into a crucible, sinter in a high-temperature furnace at 980°C for 10 hours in an air atmosphere, cool to room temperature with the furnace, and then pulverize the sample and sinter in a nitrogen / hydrogen mixed atmosphere. The 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 substance.

[0060] Utilize fluorescence spectrometer to analyze the fluorescent material that obtains in embodiment 1, excite in blue light 450nm, ob...

Embodiment 2

[0063] The broad-band emitting near-infrared luminescent substance described in this embodiment contains a compound whose composition formula is Ca 3 Nb 0.9 Ga 3 Si 2 o 13.9 : 0.1Cr.

[0064] According to the chemical formula Ca 3 Nb 0.9 Ga 3 Si 2 o 13.9 : 0.1Cr stoichiometric ratio, accurate weighing of Ga 2 o 3 , Nb 2 o 5 , CaCO 3 , SiO 2 、Cr 2 o 3 Raw materials, grind and mix the above raw materials into a crucible, sinter in a high-temperature furnace at 950°C for 10 hours in an air atmosphere, cool to room temperature with the furnace, then crush the sample and sinter in an ammonia gas mixture, the sintering temperature The temperature is 1400°C, the sintering time is 10 hours, and the sample is ball milled, washed with water and sieved to obtain the desired 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 i...

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

Belonging to the technical field of luminescent materials, the invention in particular relates to a broad-band near-infrared emission luminescent substance, in particular to a material capable of generating red light and near-infrared emission in a range of 700nm-1600nm under the excitation of ultraviolet, purple light, blue light and red light, and further discloses a preparation method of the material and a luminescent device containing the luminescent material. The broad-band near-infrared emission luminescent substance includes an inorganic compound with a molecular formula of AaDbMcEdOe:xCr. The luminescent substance has a strictly occupied ordered structure, and the material is a single substance, adopts Cr as the optical active center, can well absorb ultraviolet light, blue light and red light, and under the excitation of ultraviolet or purple light or blue light, can realize broad-band red light and near-infrared emission in the range of 700nm-1600nm, and has shorter fluorescence lifetime.

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 red light in the range of 700nm-1600nm and near-infrared emission which can be produced under the excitation of ultraviolet, violet, 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 and the near-infrared region in the range of 650nm-1700nm cover the combined frequency of vibration of hydrogen-containing groups (O-H, N-H, C-H) and the characteristic information of the absorption region of all levels of frequency doubling, therefore, by scanning The near-infrared spectrum of the sample can analyze the characteristic information of the hydrogen-containing groups of the organic molecules in the samp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/68C09K11/78C09K11/79C09K11/80H01L33/50H01L51/50
CPCH01L33/501C09K11/684C09K11/685C09K11/7708H10K50/11
Inventor 解荣军刘荣辉曾华涛周天亮刘元红
Owner XIAMEN UNIV
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