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Cr-doped perovskite structure halide near infrared light-emitting material and preparation method thereof

A perovskite-type, luminescent material technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problem of weak luminescence intensity of near-infrared luminescent materials, achieve excellent thermal quenching characteristics, simple preparation method, and stable chemical properties Effect

Active Publication Date: 2019-06-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the luminous intensity of the currently studied near-infrared luminescent materials is still relatively weak, and further research is needed on how to increase the luminous intensity.

Method used

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  • Cr-doped perovskite structure halide near infrared light-emitting material and preparation method thereof
  • Cr-doped perovskite structure halide near infrared light-emitting material and preparation method thereof
  • Cr-doped perovskite structure halide near infrared light-emitting material and preparation method thereof

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Embodiment 1

[0028] The chemical composition formula of this embodiment is Cs 2 AgIn 0.9 Cl 6 :0.1Cr 3+ The preparation method of the near-infrared luminescent material is as follows:

[0029] According to the chemical composition formula Cs 2 AgIn 0.9 Cl 6 :0.1Cr 3+ Stoichiometric ratio, weigh CsCl, AgCl, InCl respectively 3 , CrCl 3 The high-purity powder raw materials are ground in an agate mortar and a glove box full of protective atmosphere, so that the raw materials are fully mixed and even. Transfer the mixed raw materials to a quartz tube and vacuum seal the tube, then place it in a high-temperature reaction furnace for sintering at 300-600°C for 1-7 days, take it out after natural cooling, and grind again to obtain a single-phase Cs 2 AgIn 0.9 Cl 6 :0.1Cr 3+ of fluorescent powder.

[0030] The powder X-ray diffraction (XRD) spectrum of the near-infrared luminescent material prepared in this embodiment is as follows: figure 1 As shown, the excitation spectrum as fig...

Embodiment 2

[0032] The chemical composition formula of this embodiment is Cs 2 AgGa 0.4 In 0.5 Cl 6 :0.1Cr 3+ The preparation method of the near-infrared luminescent material is as follows:

[0033] According to the chemical composition formula Cs 2 AgGa 0.4 In 0.5 Cl 6 :0.1Cr 3+ Stoichiometric ratio, weigh CsCl, AgCl, GaCl respectively 3 , InCl 3 , CrCl 3 The high-purity powder raw materials are ground in an agate mortar and a glove box full of protective atmosphere, so that the raw materials are fully mixed and even. Transfer the mixed raw materials to a quartz tube and vacuum seal the tube, then place it in a high-temperature reaction furnace for sintering at 300-600°C for 1-7 days, take it out after natural cooling, and grind again to obtain a single-phase Cs 2 AgGa 0.4 In 0.5 Cl 6 :0.1Cr 3+ of fluorescent powder.

[0034] The powder X-ray diffraction (XRD) spectrum of the near-infrared luminescent material prepared in this embodiment is as follows: figure 1 As shown...

Embodiment 3

[0036] The chemical composition formula of this embodiment is CsRbAgIn 0.9 Cl 6 :0.1Cr 3+ The preparation method of the near-infrared luminescent material is as follows:

[0037] According to the chemical composition formula CsRbAgIn 0.9 Cl 6 :0.1Cr 3+ Stoichiometric ratio, weigh CsCl, RbCl, AgCl, InCl respectively 3 , CrCl 3 The high-purity powder raw materials are ground in an agate mortar and a glove box full of protective atmosphere, so that the raw materials are fully mixed and even. Transfer the mixed raw materials to a quartz tube and vacuum seal the tube, then place it in a high-temperature reaction furnace for sintering at 300-600°C for 1-7 days, take it out after natural cooling, and grind again to obtain a single-phase CsRbAgIn 0.9 Cl 6 :0.1Cr 3+ of fluorescent powder.

[0038] The powder X-ray diffraction (XRD) spectrum of the near-infrared luminescent material prepared in this embodiment is as follows: figure 1 As shown, the excitation spectrum as Ima...

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Abstract

The invention discloses a Cr-doped perovskite structure halide near infrared light-emitting material and a preparation method thereof. The chemical composition is AB1-xX3:xCr<3+>, wherein A:B:X is equal to 1:1:3; A is at least one of Cs and Rb; B is at least one of Ag, Na, In, Ga and Pb; X is at least one of Cl and Br; and x is more than 0 and less than 100 mole percent. The invention also discloses the preparation method of the near infrared light-emitting material. The preparation method comprises the following steps: (1) weighing materials: weighing an A-containing compound, a B-containingcompound and a Cr-containing compound separately; and (2) grinding and uniformly mixing the materials and performing high-temperature calcining synthesis by a solid phase method. An emission band of the near infrared light-emitting material is positioned at 800 to 1400 nm and the emission peak is positioned at about 950 to 1050 nm. The preparation method is simple in process, low in raw material price, easy in large-scale technical promotion and is of great importance in research and development of near infrared fluorescent powder with wide spectrum emission. The light-emitting material can beused for manufacturing near infrared light-emitting devices and can be applied in the fields of spectral transformation, radioactive labeling, anti-faking and the like.

Description

technical field [0001] The invention relates to the technical field of near-infrared luminescent materials, in particular to a Cr-doped halide near-infrared luminescent material with a perovskite structure and a preparation method. Background technique [0002] Near-infrared light (NIR, 800-2500nm) analysis technology contains chemical bond information such as C-H, O-H and N-H, and can provide characteristic data of biological tissues and organic materials. important application. When a beam of NIR light irradiates biological organisms, different components of the organisms absorb the NIR spectrum differently, so the measured absorption, reflection and transmission spectra are different; according to this principle, it can be used for non-destructive testing, such as quickly identifying the quality of food , Differentiate between food and additives. In addition, the biological optical window has the first window (NIR, 650-950nm), the second window (NIR, 1000-1350nm) and th...

Claims

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Application Information

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IPC IPC(8): C09K11/62
Inventor 刘泉林赵芳仪宋振赵静
Owner UNIV OF SCI & TECH BEIJING
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