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A kind of near-infrared light-emitting material and preparation method thereof

A luminescent material and near-infrared technology, applied in luminescent materials, chemical instruments and methods, photovoltaic power generation, etc., can solve the problems of small absorption cross-section, difficulty in efficiently absorbing sunlight energy, etc. The effect of photoelectric conversion efficiency

Active Publication Date: 2022-07-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

where with Yb 3+ Ionic co-doped rare earth donor ions belong to the 4f-4f narrow-band transition, and its absorption cross section is small and has a linear spectrum, so it is difficult to efficiently absorb most of the incident solar energy

Method used

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  • A kind of near-infrared light-emitting material and preparation method thereof
  • A kind of near-infrared light-emitting material and preparation method thereof
  • A kind of near-infrared light-emitting material and preparation method thereof

Examples

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Embodiment approach

[0027] Borate has the advantages of good stability and easy preparation. The matrix material of the present invention is: M' 3 M(BO 3 ) 3 , the doping ion is Ce 3+ and RE 3+ . Wherein: M' is one or more combinations of Ba and Sr, M is at least one of Y and Gd, and RE is selected from at least one of Yb and Pr; x and y are rare earth ions doped. Molar weight, and 0.005≤x≤0.05, 0.005≤y≤0.30. It can provide a broadband excitation spectrum of 200-400nm, and achieve near-infrared emission through a down-conversion process.

[0028] The following are the preparation methods and luminescent properties of several specific near-infrared light-emitting materials given in the present invention, so as to further explain the technical solutions of the present invention.

Embodiment 1

[0030] This example is the preparation of near-infrared light-emitting material Ba by high-temperature solid-phase method 3 Y 0.98 Ce 0.01 Yb 0.01 (BO 3 ) 3 , the specific preparation process is as follows:

[0031] 1) According to the reactant cation molar ratio Ba 2+ :Y 3+ :B 3+ :Ce 3+ :Yb 3+ =3:0.98:3:0.01:0.01 Weigh the raw materials BaCO respectively 3 (Analytical pure) 0.4440g, H 3 BO 3 (Analytical pure) 0.1391g, CeO 2 (99.99%) 0.0013g, Y 2 O 3 (99.99%) 0.0830g, Yb 2 O 3 (99.99%) 0.0015g;

[0032] 2) Mix each component raw material evenly, put it into a mortar and fully grind for 40 minutes;

[0033] 3) Put the fully ground and mixed raw materials into a corundum crucible, sinter at a high temperature of 900 degrees for 5 hours in a reducing atmosphere, and then cool to room temperature and grind into powder to obtain a near-infrared luminescent material.

[0034] figure 1 It is the XRD pattern of the luminescent material of this example. It can be se...

Embodiment 2

[0036] This example is the preparation of near-infrared light-emitting material Ba by high-temperature solid-phase method 3 Gd 0.94 Ce 0.05 Yb 0.01 (BO 3 ) 3 , the specific preparation process is as follows:

[0037] 1) According to the reactant cation molar ratio Ba 2+ :Gd 3+ :B 3+ :Ce 3+ :Yb 3+ =3:0.94:3:0.05:0.01 Weigh the raw material BaCO respectively 3 (Analytical pure) 0.7992g, H 3 BO 3 (Analytical pure) 0.2503g, CeO 2 (99.99%) 0.0116g, Gd 2 O 3 (99.99%) 0.2300g, Yb 2 O 3 (99.99%) 0.0027g;

[0038] 2) Mix each component raw material evenly, put it into a mortar and fully grind for 40 minutes;

[0039] 3) The fully ground and mixed raw materials are put into a corundum crucible, sintered at a high temperature of 1000 degrees for 3 hours in a reducing atmosphere, and then cooled to room temperature and ground into powder to obtain a near-infrared luminescent material.

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Abstract

The invention discloses a near-infrared light-emitting material and a preparation method thereof. The structural formula of the near-infrared light-emitting material is: M' 3 M 1‑x‑y (BO 3 ) 3 : xCe 3+ ,yRE 3+ ; M' is one or more of Ba, Sr, M is one or more of Y, Gd, RE is one or more of Yb, Pr; x and y are doped rare earth ions Doping molar amount, 0.005≤x≤0.05, 0.005≤y≤0.30. The method adopted in the present invention has simple operation, short preparation period and no pollution to the environment. The preparation method includes: mixing and grinding the B source compound, the Ce source compound, the M'-containing compound, the M-containing compound, and the RE-containing compound evenly, calcining in a reducing atmosphere, cooling to room temperature, and grinding into powder. The near-infrared light-emitting material of the present invention has a wide excitation spectrum at 200-400 nm, utilizes the energy transfer process to generate near-infrared light at 900-1100 nm that matches the forbidden band width of silicon, and can be used as a spectrum conversion material for silicon solar cells .

Description

technical field [0001] The invention belongs to the field of solid luminescent materials in physics, and particularly relates to a near-infrared luminescent material and a preparation method thereof. Background technique [0002] The limited reserves of fossil energy and the increasingly serious environmental pollution are the main challenges faced by various countries, so it is particularly important to develop pollution-free and sustainable new energy. In recent years, new energy sources such as wind energy, solar energy, tidal energy, biomass energy and geothermal energy have received extensive attention. Among them, solar energy has the advantages of no geographical restrictions, green and pollution-free, and inexhaustible. [0003] Silicon-based solar cells are still the mainstream of the solar cell market. But affected by the Shockley-Queisser limit, the maximum theoretical value of photoelectric conversion efficiency of solar cells is 30%, and the actual photoelectr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
CPCC09K11/778Y02P70/50
Inventor 赵瑾
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY