Preparation method and application method of Cr<3+> doped near-infrared wide-spectrum luminescent material

A luminescent material and near-infrared technology, applied in luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of low luminous efficiency and narrow range

Inactive Publication Date: 2020-07-07
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Near-infrared luminescent materials that have been discovered so far mainly have problems such as low luminous efficiency and narrow range. Theref

Method used

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  • Preparation method and application method of Cr&lt;3+&gt; doped near-infrared wide-spectrum luminescent material
  • Preparation method and application method of Cr&lt;3+&gt; doped near-infrared wide-spectrum luminescent material
  • Preparation method and application method of Cr&lt;3+&gt; doped near-infrared wide-spectrum luminescent material

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Embodiment 1

[0031] Embodiment 1: The chemical composition formula of this embodiment is Ca 3 Y 1.98 Ge 3 o 12 : 0.02Cr 3+ The specific preparation method of the broad-spectrum near-infrared luminescent material is as follows:

[0032] According to the chemical composition formula Ca 3 Y 1.98 Ge 3 o 12 : 0.02Cr 3+ Stoichiometric ratio, respectively weigh CaO, Y 2 o 3 , GeO 2 、Cr 2 o 3 High-purity raw materials and 3% flux LiF are placed in an agate mortar and an appropriate amount of ethanol is added for grinding for 20-40 minutes to fully mix the raw materials evenly. After drying, transfer the mixed raw materials to an alumina crucible and put In a high-temperature box-type furnace, heat up to 1400°C at a heating rate of 10°C / min, hold for 6 hours, cool to room temperature with the furnace, and regrind into powder. Afterwards, the obtained sample Beijing stock is acid-washed to remove a small amount of impurities, and the chemical composition formula can be obtained as Ca ...

Embodiment 2

[0033] Embodiment 2: The chemical composition formula of this embodiment is Ca 3 Y 1.96 Ge 3 o 12 : 0.04Cr 3+The specific preparation method of the broad-spectrum near-infrared luminescent material is as follows:

[0034] According to the chemical composition formula Ca 3 Y 1.96 Ge 3 o 12 : 0.04Cr 3+ Stoichiometric ratio, respectively weigh CaO, Y 2 o 3 , GeO 2 、Cr 2 o 3 High-purity raw materials and 3% flux LiF are placed in an agate mortar and an appropriate amount of ethanol is added for grinding for 20-40 minutes to fully mix the raw materials evenly. After drying, transfer the mixed raw materials to an alumina crucible and put In a high-temperature box-type furnace, heat up to 1400°C at a heating rate of 10°C / min, hold for 6 hours, cool to room temperature with the furnace, and regrind into powder. Afterwards, the obtained sample Beijing stock is acid-washed to remove a small amount of impurities, and the chemical composition formula can be obtained as Ca 3...

Embodiment 3

[0035] Embodiment 3: The chemical composition formula of this embodiment is Ca 3 Y 1.94 Ge 3 o 12 : 0.06Cr 3+ The specific preparation method of the broad-spectrum near-infrared luminescent material is as follows:

[0036] According to the chemical composition formula Ca 3 Y 1.94 Ge 3 o 12 : 0.06Cr 3+ Stoichiometric ratio, respectively weigh CaO, Y 2 o 3 , GeO 2 、Cr 2 o 3 High-purity raw materials and 3% flux LiF are placed in an agate mortar and an appropriate amount of ethanol is added for grinding for 20-40 minutes to fully mix the raw materials evenly. After drying, transfer the mixed raw materials to an alumina crucible and put In a high-temperature box-type furnace, heat up to 1400°C at a heating rate of 10°C / min, hold for 6 hours, cool to room temperature with the furnace, and regrind into powder. Afterwards, the obtained sample Beijing stock is acid-washed to remove a small amount of impurities, and the chemical composition formula can be obtained as Ca ...

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Abstract

The invention discloses a Cr<3+> doped near-infrared wide-spectrum luminescent material and a preparation method thereof, which belong to the technical field of near-infrared luminescent materials. The general chemical formula is Ca3Y2-xGe3O12: xCr<3+>, and x is greater than or equal to 0.01 mol% and less than or equal to 20 mol%. The near-infrared luminescent material belongs to a cubic crystal system and has a garnet type space crystal structure the same as Ca3Y2Ge3O12, the space group is Ia3d, Ca<2+> occupies dodecahedron octa-coordination, Y<3+> occupies octahedron hexa-coordination, and Ge<4+> occupies tetrahedron tetra-coordination. The material is wide in excitation spectrum, the optimal excitation wavelength ranges from 400 nm to 550 nm, and the emission wavelength ranges from 700nm to 1200 nm. The material is matched with a blue-light LED chip, can be used for manufacturing a wide-spectrum near-infrared light source, and is applied to the fields of plant illumination, biological probes, military affairs and the like. The method is simple in preparation process, low in raw material price and easy to synthesize.

Description

technical field [0001] The invention relates to a preparation and application method of a near-infrared broad-spectrum luminescent material, which belongs to the technical field of near-infrared luminescent materials. The near-infrared luminescent material with a band can be applied to biological imaging, molecular probes, military fields, and the like. Background technique [0002] Near-infrared light refers to part of the invisible light with a wavelength range of 780-1400nm, which is between the visible light region and the mid-infrared region of the electromagnetic spectrum. Based on the extensive research and development of near-infrared luminescent materials, near-infrared spectroscopy has become one of the fastest-growing analytical techniques in recent years. According to different emission bands of the near-infrared luminescent material, it is applied to different scenarios, for example: the near-infrared emission spectrum located in the first biological window (650...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7707H01L33/502H01L2933/0041
Inventor 刘泉林毛宁宋振余懿
Owner UNIV OF SCI & TECH BEIJING
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