Red luminescent material and preparation method and application thereof

A technology of red light emission and emission wavelength, which is applied in the field of red light-emitting materials and its preparation, can solve the problems of low efficiency in the red light band and limit the application of red light, and achieve excellent light-emitting performance, low cost, and reliable quality

Inactive Publication Date: 2019-10-25
宁波市镇海中学 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the efficiency of the existing red light band is low, which limits the application of red light in the field of plant lighting

Method used

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  • Red luminescent material and preparation method and application thereof
  • Red luminescent material and preparation method and application thereof
  • Red luminescent material and preparation method and application thereof

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Experimental program
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preparation example Construction

[0055] The present invention also provides a method for preparing the above-mentioned red luminescent material, the method comprising the following steps:

[0056] S100: According to Gd 3-x mn x al 4 GaO 12 (wherein, 0.001≤x≤0.5, x is the mole fraction) stoichiometric ratio weighs the reaction raw materials.

[0057] Preferably, the reaction raw materials are oxides, fluorides, chlorides, carbonates, borates, oxalates or acetates containing elements in the above red luminescent materials.

[0058] S200: Grinding and mixing the weighed reaction raw materials.

[0059] Generally, the grinding of the reaction raw materials is carried out in an agate mortar, and alcohol or acetone is usually added to the reaction raw materials to speed up the grinding process.

[0060] Preferably, in order to allow the reaction raw materials to fully react in the subsequent process, in step S200, the average particle size of the reaction raw materials after grinding is 300-600 mesh.

[0061] S...

Embodiment 1

[0070] Weigh 1.4995molGd 2 o 3 , 0.001molMnO 2 , 2molAl 2 o 3 , 0.5molGa 2 o 3 The reaction raw materials; mix and grind the weighed reaction raw materials evenly and put them into a high-purity corundum crucible; under the air atmosphere, sinter in a tube furnace at 1500°C for 2 hours, and then grind after cooling to room temperature with the furnace. get Gd 2.999 mn 0.001 al 4 GaO 12 Fluorescent powder, recorded as sample 1#.

Embodiment 2

[0072] Weigh 1.495molGd 2 o 3 , 0.01molMnO 2 , 2molAl 2 o 3 , 0.5molGa 2 o 3 The reaction raw materials; mix and grind the weighed reaction raw materials evenly and put them into a high-purity corundum crucible; sinter in a tube furnace at 1700°C for 5 hours in an air atmosphere, and then grind after cooling to room temperature with the furnace. get Gd 2.99 mn 0.01 al 4 GaO 12 Phosphor powder, recorded as sample 2#.

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Abstract

The invention discloses a red luminescent material and a preparation method and application thereof. The red light-emitting material is selected from at least one of substances with a chemical generalformula as shown in a formula I: Gd<3-x>Mn<x>Al<4>Ga<12>, wherein x is greater than or equal to 0.001 and less than or equal to 0.5. The red luminescent material provided by the invention has wide excitation and emission spectrums and excellent luminescence property, can emit red light under excitation of ultraviolet light, near ultraviolet light and blue-green light, and can be applied to light-emitting diode (LED) plant illumination.

Description

technical field [0001] The application relates to a red luminescent material and its preparation method and application, belonging to the technical field of luminescent materials. Background technique [0002] A white LED light source is usually composed of a chip and a phosphor. The phosphor has a light conversion function and can convert the chip light source into light of various wavelengths. Phosphor powder is composed of rare earth luminescent ions or transition group luminescent ions. These luminescent ions have rich electronic energy level structures, and the transitions between different electronic energy levels make the luminescent bands cover ultraviolet, visible and infrared bands. LED light sources have the advantages of long life, high efficiency, and energy saving, and are expanding into applications such as health lighting, automotive lighting, smart lighting, and agricultural lighting. [0003] The spectrum that affects plant growth is mainly concentrated in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80A01G7/04F21K9/00
CPCA01G7/045C09K11/7706F21K9/00Y02P60/14
Inventor 朱仕哲蔡睿亿曾昊溟刘永福刘爽蒋俊
Owner 宁波市镇海中学
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