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Cr < 3 + >-doped lithium indium germanate near-infrared luminescent material and preparation method thereof

A luminescent material, indium germanate technology, applied in luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of low luminous efficiency, narrow emission range, etc., achieve high luminous quantum efficiency, and the preparation method is simple and easy. The effect of technology promotion and mass production

Active Publication Date: 2020-07-10
UNIV OF SCI & TECH BEIJING
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  • 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 emission range. Therefore, it is of great significance and application prospect to seek near-infrared luminescent materials with high efficiency and wide emission range.

Method used

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  • Cr &lt; 3 + &gt;-doped lithium indium germanate near-infrared luminescent material and preparation method thereof
  • Cr &lt; 3 + &gt;-doped lithium indium germanate near-infrared luminescent material and preparation method thereof
  • Cr &lt; 3 + &gt;-doped lithium indium germanate near-infrared luminescent material and preparation method thereof

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Embodiment 1

[0027] Embodiment 1: The chemical composition formula of this embodiment is LiIn 0.99 Ge 2 o 6 : 0.01Cr 3+ The specific preparation method of the broad-spectrum near-infrared luminescent material is as follows:

[0028] Chemical composition LiIn 0.99 Ge 2 o 6 : 0.01Cr 3+ Stoichiometric ratio, respectively weigh Li 2 CO 3 、In 2 o 3 、GeO 2 、Cr 2 o 3 High-purity raw materials and 1% flux H 3 BO 3 , put in an agate mortar and add an appropriate amount of absolute ethanol to grind for 20-40 minutes, so that the raw materials are fully mixed evenly, and after drying, transfer the mixed raw materials to an alumina crucible, put them into a high-temperature box furnace, and heat at 10°C / Min heating rate to 900 ℃ ~ 1300 ℃, heat preservation 1-10h, cool down to room temperature with the furnace, re-grind into powder. After that, the obtained sample is acid-washed to remove a small amount of impurities, and the chemical composition formula can be obtained as LiIn 0.99 G...

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Abstract

The invention discloses a Cr < 3 + >-doped lithium indium germanate near-infrared luminescent material and a preparation method thereof, and belongs to the technical field of near-infrared luminescentmaterials. The chemical general formula of the material is LiIn1-x-yMyGe2O6: xCr < 3 + >, M is one or more of Sc and Ga elements, x is greater than or equal to 0.01 mol% and less than or equal to 20mol%, and y is greater than or equal to 0 and less than or equal to 0.5. In the near-infrared luminescent material, LiIn1-x-yMyGe2O6: xCr < 3 + > belongs to an orthorhombic system, and has a spatial crystal structure of the same type as LiInGe2O6. The material is wide in excitation spectrum, the excitation wavelength ranges from 250 nm to 850 nm and comprises the ultraviolet invisible wavelength range and the visible wavelength range, and the emission wavelength range of the material ranges from 700 nm 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 and the like. The method is simple in preparation process, low in raw material priceand 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 can be applied to living 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 (650-950n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66C09K11/78H01L33/50
CPCC09K11/681C09K11/7707H01L33/502H01L2933/0041
Inventor 刘泉林毛宁宋振余懿
Owner UNIV OF SCI & TECH BEIJING
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