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Cr<3+>-doped strontium indium phosphate broadband near-infrared luminescent material and preparation method thereof

A technology of strontium indium phosphate and luminescent materials, applied in the field of near-infrared luminescent materials, to achieve the effects of easy excitation conditions, wide excitation spectrum, and low raw material prices

Active Publication Date: 2021-02-02
UNIV OF SCI & TECH BEIJING
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  • Abstract
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Problems solved by technology

[0004] In order to overcome the deficiencies of existing near-infrared luminescent materials, the technical problem mainly solved by the present invention is to provide a Cr 3+ doped with Sr 3 InP 3 o 12 The strontium indium phosphate broadband near-infrared luminescent material with a crystal structure has a wide emission wavelength range and good chemical stability, which provides a better choice of luminescent materials for related research and application fields

Method used

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  • Cr&lt;3+&gt;-doped strontium indium phosphate broadband near-infrared luminescent material and preparation method thereof
  • Cr&lt;3+&gt;-doped strontium indium phosphate broadband near-infrared luminescent material and preparation method thereof

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Embodiment 1

[0032] Embodiment 1: The chemical composition formula of this embodiment is Sr 3 In 0.98 Cr 0.02 P 3 o 12 The specific preparation method of the broadband near-infrared luminescent material is as follows:

[0033] According to the chemical composition formula Sr 3 In 0.98 Cr 0.02 P 3 o 12 , according to the stoichiometric ratio, respectively weighed SrCO 3 ,In 2 o 3 ,NH 4 h 2 PO 4 ,Cr 2 o 3High-purity raw materials are placed in an agate mortar and an appropriate amount of absolute ethanol is added to grind for 20-40 minutes to fully mix the raw materials evenly. Heat up to 900°C at a heating rate of -3°C / min, hold for 2-6 hours, cool down to room temperature with the furnace, and regrind the sample into powder. Then transfer the ground powder to a high-temperature alumina crucible again, and place it in a box-type furnace, raise the temperature to 900°C-1300°C, keep it warm and calcined for 3-10 hours under high temperature conditions, at a rate of 5-10°C / min...

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Abstract

The invention discloses a Cr<3+>-doped strontium indium phosphate broadband near-infrared luminescent material and a preparation method. The general chemical formula of the luminescent material is Sr3In1-x-yMyP3O12:xCr<3+>, M is one or more of Sc and Lu elements, x is greater than or equal to 0.001 and less than or equal to 0.11, and y is greater than or equal to 0 and less than or equal to 1. Thenear-infrared luminescent material belongs to a cubic crystal system, has a crystal structure of the same type as Sr3InP3O12, and has a space group of I-43d. The material is wide in excitation spectrum, the excitation wavelength is within the range of 250-600 nm, the material can be excited by ultraviolet light and visible light, and the emission wavelength range of the material is 700-1100 nm. The broadband near-infrared luminescent material can be matched with a blue light or ultraviolet light LED chip for use in manufacturing of a broadband near-infrared light source, and has important application value in the fields of food nondestructive quality analysis, human physiological status non-invasive detection and the like. The preparation process is simple, raw materials are low in price,and industrial production is easy.

Description

technical field [0001] The invention relates to a preparation and application method of a broadband near-infrared luminescent material, which belongs to the technical field of near-infrared luminescent materials. The near-infrared luminescent material can be applied to the fields of non-destructive quality analysis of food, living organism imaging, marking and tracing, and the like. Background technique [0002] Near-infrared light is invisible light between the visible light region and the mid-infrared light region on the electromagnetic spectrum. Since the analysis technology of near-infrared light contains chemical bond information such as C-H, O-H and N-H, it can provide characteristic data of biological tissues and organic materials, so near-infrared light can be used for non-destructive quality analysis of food. In addition, near-infrared light has a strong penetrating ability in the living body, and is often used as a biological probe for medical biological imaging. ...

Claims

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Application Information

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IPC IPC(8): C09K11/71C09K11/81H01L33/50
CPCC09K11/71C09K11/771H01L33/502
Inventor 宋振刘天瑶蔡昊安雅静刘泉林
Owner UNIV OF SCI & TECH BEIJING
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