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A broadband near-infrared emitting phosphor capable of being excited by blue light and its preparation method

A blue light excitation, phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of narrow emission bandwidth, large package volume, slow response, etc., achieve uniform particle size, high luminous efficiency, and reduce sintering temperature. Effect

Active Publication Date: 2022-06-14
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the tungsten halogen lamp has a wide spectral range as a broadband near-infrared light source widely used at present, it also has very obvious defects: slow response, low efficiency, large packaging volume, short life, etc.
Liu Shuting's published Lu 2 o 3 :Mn 4+ (Acta Synthetic Crystals 48 (2019) 1240-1246), near-infrared emission peaks at 695nm and 712nm can be observed, which are derived from Mn 4+ Ionic 2 E → 4 A 2 and 4 T 2 → 4 A 2 transition, but its emission bandwidth is narrow

Method used

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  • A broadband near-infrared emitting phosphor capable of being excited by blue light and its preparation method
  • A broadband near-infrared emitting phosphor capable of being excited by blue light and its preparation method
  • A broadband near-infrared emitting phosphor capable of being excited by blue light and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] By chemical expression (Ba.) 0.99 Sm 0.01 )Al 10 O 16 The stoichiometric ratio is called the raw material BaCO 3 、Al 2 O 3 and Sm 2 O 3 , the molar ratio between them is 0.99: 5: 0.005; the homogeneous mixture after grinding the raw material, for the first time in a high-temperature furnace at 5% H 2 +95％N 2 (Volume ratio) nitrogen-hydrogen mixing atmosphere and sintering at 1400 °C for 2 hours, after slow cooling to room temperature; The sample is then removed and ground the intermediate product (Ba 0.99 Sm 0.01 )Al 10 O 16 , and press the chemical formula (Ba 0.99 Sm 0.01 )Al 10 O 16 (AlN) 0.5 The stoichiometric ratio is called the intermediate product and the AlN, the molar ratio between them is 1:0.5, followed by the addition of barium fluoride flux, the mass of which is 0.01% of the total mass of the intermediate product and AlN. The homogeneous mixture after the above grinding, the second time in a high-temperature furnace at 5% H 2 +95％N 2 (volume ratio) nitrogen-hyd...

Embodiment 2

[0032] By chemical expression (Ba.) 0.99 Sm 0.01 )Al 10 O 16 The stoichiometric ratio is called the raw material BaCO 3 、Al 2 O 3 and Sm 2 O 3 , the molar ratio between them is 0.99: 5: 0.005; the homogeneous mixture after grinding the raw material, for the first time in a high-temperature furnace at 5% H 2 +95％N 2 (Volume ratio) nitrogen-hydrogen mixing atmosphere and sintering at 1450 °C for 5 hours, after which it is slowly cooled to room temperature; The sample is then removed and ground the intermediate product (Ba 0.99 Sm 0.01 )Al 10 O 16 , and press the chemical formula (Ba 0.99 Sm 0.01 )Al 10 O 16 (AlN) 0.5 The stoichiometric ratio is called the intermediate product and AlN, and the molar ratio between them is 1:0.5, followed by the addition of barium fluoride flux, which has a mass of 0.05% of the total mass of the intermediate product and AlN. The homogeneous mixture after the above grinding, the second time in a high-temperature furnace at 5% H 2 +95％N 2 (Volume ratio) ...

Embodiment 3

[0035] By chemical expression (Ba.) 0.98 Sm 0.02 )Al 10 O 16 The stoichiometric ratio is called the raw material BaCO 3 、Al 2 O 3 and Sm 2 O 3 , the molar ratio between them is 0.98: 5: 0.01; the homogeneous mixture after grinding the raw material, for the first time in a high-temperature furnace at 5% H 2 +95％N 2 (Volume ratio) nitrogen-hydrogen mixing atmosphere and sintering at 1450 °C for 5 hours, after which it is slowly cooled to room temperature; The sample is then removed and ground the intermediate product (Ba 0.98 Sm 0.02 )Al 10 O 16 , and press the chemical formula (Ba 0.98 Sm 0.02 )Al 10 O 16 (AlN) 0.75 The stoichiometric ratio is called the intermediate product and AlN, and the molar ratio between them is 1:0.75, followed by the addition of barium fluoride flux, which has a mass of 0.1% of the total mass of the intermediate product and AlN. The homogeneous mixture after the above grinding, the second time in a high-temperature furnace at 5% H 2 +95％N 2 (Volume ratio) ...

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Abstract

The invention discloses a broadband near-infrared emitting phosphor capable of being excited by blue light and a preparation method thereof. The fluorescent powder has the following chemical expression: (Ba 1‑x SM x ) Al 10 o 16 (AlN) y , wherein, x is 0.01-0.2, and y is 0.5-1.5. The broadband near-infrared emitting fluorescent powder obtained in the present invention has a wide excitation bandwidth, covers the ultraviolet, purple and blue light regions, the excitation peak is located near 467nm, and the peak of the excitation spectrum is high, and can be used as a broadband near-infrared emitting fluorescence excited by ultraviolet, purple and blue light powder; the fluorescent powder has good dispersibility, uniform particle size, good chemical stability and high luminous efficiency; at the same time, the halide of the metal ion contained in the chemical expression disclosed by the present invention is used as a flux to reduce the sintering temperature.

Description

Technical field [0001] The present invention relates to the field of luminescent material technology, in particular to a broadband near-infrared emission phosphor capable of being excited by blue light and a preparation method thereof. Background [0002] In 1964, near-infrared spectroscopy was first applied to detect the moisture content of cereals. After decades of development, near-infrared spectroscopy technology and near-infrared imaging technology have been widely used, realizing the measurement of nutrients, pesticide residues, additives and other components in various crops or foods, and has also become an important tool for medical research such as brain science research and early diagnosis of cancer. [0003] In recent years, it has been proposed that if near-infrared technology can be integrated into portable devices such as mobile phones, ordinary people can realize the detection of food nutrients, additives and human body conditions at any time. This portable, fast, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
CPCC09K11/7764C09K11/0883
Inventor 余华钟家松毛启楠陈雷锋朱怡雯李心悦赵红挺
Owner HANGZHOU DIANZI UNIV
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