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a cr 3 + Doped strontium indium phosphate broadband near-infrared luminescent material and preparation method

The technology of strontium indium phosphate and luminescent material is applied in the field of near-infrared luminescent materials, and achieves the effects of simple preparation method, wide excitation spectrum and low cost of raw materials

Active Publication Date: 2022-02-08
UNIV OF SCI & TECH BEIJING
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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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  • a cr <sup>3</sup> <sup>+</sup> Doped strontium indium phosphate broadband near-infrared luminescent material and preparation method

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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 3For high-purity raw materials, put them in an agate mortar and add an appropriate amount of absolute ethanol to grind for 20-40 minutes to make the raw materials fully mixed evenly, transfer the mixed raw materials to an alumina crucible, put them into a box furnace for pre-burning, and use 1 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...

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Abstract

The invention discloses a Cr 3+ Doped strontium indium phosphate broadband near-infrared luminescent material and preparation method, its general chemical formula is: Sr 3 In 1‑x‑y m y P 3 o 12 :xCr 3+ , wherein: M is one or more of Sc and Lu elements, 0.001≤x≤0.11, 0≤y≤1. The near-infrared luminescent material belongs to the cubic crystal system, and has the 3 InP 3 o 12 Crystal structure of the same type, space group I‑43d. The material of the invention has a wide excitation spectrum, the excitation wavelength is in the range of 250-600nm, can be excited by ultraviolet light and visible light, and the emission wavelength range is 700-1100nm. The invention can be used to manufacture a broadband near-infrared light source when matched with a blue or ultraviolet LED chip, and has important application value in the fields of non-destructive quality analysis of food and non-invasive detection of human physiological state. The preparation process of the invention is simple, the raw material price is low, and the 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. ...

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Application Information

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Patent Type & Authority Patents(China)
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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