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A kind of near-infrared luminescent material and preparation method thereof, and near-infrared LED

A luminescent material and near-infrared technology, applied in luminescent materials, chemical instruments and methods, semiconductor devices, etc., can solve the problems of lack of near-infrared phosphors, etc., and achieve the effect of increased luminous intensity and excellent luminous performance

Active Publication Date: 2022-03-29
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the near-infrared field of 700-750nm, there is still a lack of near-infrared phosphors that can be effectively excited by blue light chips and have excellent luminous intensity.

Method used

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  • A kind of near-infrared luminescent material and preparation method thereof, and near-infrared LED
  • A kind of near-infrared luminescent material and preparation method thereof, and near-infrared LED
  • A kind of near-infrared luminescent material and preparation method thereof, and near-infrared LED

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preparation example Construction

[0054] The present invention also provides a preparation method of the near-infrared luminescent material described in the above technical scheme, comprising the following steps:

[0055] A) Mix the compound containing A element, the compound containing Q element, the compound containing L element, the compound containing M element and the chromium source compound to obtain a mixture;

[0056] B) The mixture is sintered to obtain a luminescent material.

[0057] Regarding step A):

[0058] In the present invention, the compound containing element A is preferably one or more of oxides, phosphates, oxalates and nitrates of element A. In some embodiments of the present invention, the compound containing element A is yttrium oxide.

[0059] In the present invention, the compound containing Q element is preferably one or more of oxides, hydroxides, acetates, carbonates, phosphates and nitrates of Q elements. In some embodiments of the present invention, the compound containing Q...

Embodiment 1

[0072] The raw materials are yttrium oxide (99.95%), barium carbonate (99.99%), aluminum oxide (99.99%), germanium oxide (99.999%), chromium oxide (analytical pure), and the molar ratio between them is 2.8:0.2:4.75: 0.2: 0.05, add 1% of H when mixing 3 BO 3 (99.99%) fully ground to obtain a mixture. Put it in a corundum crucible, pre-fire at 1000°C for 4 hours, cool to room temperature and grind again, and finally sinter at 1450°C for 4 hours, naturally cool and take out the sample, which is the product.

[0073] The obtained sample is light green powder, and its excitation spectrum is broadband, such as figure 1 shown, figure 1 It is the excitation spectrum of the near-infrared luminescent material obtained in Example 1, and the monitoring peak position is 710 nm.

[0074] The emission spectrum of the obtained sample was tested and the results were as follows figure 2 shown, figure 2 It is the emission spectrum of the near-infrared light-emitting material obtained in ...

Embodiment 2

[0078]The raw materials are yttrium oxide (99.95%), barium carbonate (99.99%), aluminum oxide (99.99%), germanium oxide (99.999%), chromium oxide (analytical pure), and the molar ratio between them is 2.6:0.4:4.55: 0.4:0.05, add 1% H when mixing 3 BO 3 (99.99%) is fully ground and uniform, placed in a corundum crucible, pre-fired at 1000 ° C for 4 hours, cooled to room temperature and ground again, and finally sintered at 1450 ° C for 4 hours, naturally cooled to take out the sample, which is the product. The obtained sample is light green powder with molecular formula Y 2.6 Ba 0.4 Al 4.55 Ge 0.4 O 12 : 0.05Cr.

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Abstract

The invention provides a near-infrared luminescent material, a preparation method thereof, and a near-infrared LED. The near-infrared luminescent material provided by the present invention has a structure shown in formula (1): A 3‑x Q x L 5‑y‑z m y o 12 :zCr 3+ Formula (1); wherein, 0.1≤x≤2.0, 0.1≤y≤2.0, 0.001≤z≤0.3; A element is a rare earth element, selected from one or more of La, Lu and Y; Q element is selected from One or more of Zn, Mg, Sr and Ba; L element is the third main group element, selected from Al and / or Ga; M element is one of Ge, Ti, Zr, Sn, Si and Hf or several. The above-mentioned near-infrared luminescent material provided by the present invention is double substituted by Q and M elements, and the type of A element and the ratio of each element are controlled at the same time, so that the obtained material can be excited by blue light and generate near-infrared light, and has a higher luminous intensity. .

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a near-infrared luminescent material and a preparation method thereof, and a near-infrared LED. Background technique [0002] In recent years, the field of plant lighting has received extensive attention. In traditional plant lighting, high-pressure sodium lamps and metal halide lamps have the disadvantages of high energy consumption and high power. In contrast, light-emitting diodes (LEDs) have the advantages of low energy consumption and high efficiency, which have aroused great interest in the industry. In the process of plant photosynthesis, blue light (400-500nm), red light (600-690nm) and near-infrared light (700-750nm) play extremely important roles in regulating plant growth and promoting plant development. Studies have shown that additional near-infrared (700-750nm) supplemental light can effectively improve the efficiency of processes such as photosynthesis. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80H01L33/50
CPCC09K11/7703H01L33/502
Inventor 李成宇谭涛庞然姜丽宏张粟李达刘贯宇
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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