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Deep red phosphor for LED plant growth lamp and preparation method thereof

A plant growth lamp and phosphor technology, applied in the directions of botanical equipment and methods, horticultural methods, chemical instruments and methods, etc., to achieve the effects of easy operation, wide excitation range and simple preparation method

Inactive Publication Date: 2019-10-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are relatively few luminescent materials with 700nm-800nm ​​broad-spectrum emission on the market, and there is no broadband deep red phosphor with a peak near the plant phytochrome (Pfr=730nm), so a wide-band, non-toxic and low-cost phosphor has been developed. Moderate crimson phosphor and the preparation of suitable plant growth lamps are of great significance to the development of efficient green agriculture in our country

Method used

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  • Deep red phosphor for LED plant growth lamp and preparation method thereof
  • Deep red phosphor for LED plant growth lamp and preparation method thereof
  • Deep red phosphor for LED plant growth lamp and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh raw material Y 2 o 3 0.005 mol, Al 2 o 3 0.0144 mol, H 3 BO 3 0.056 mol, Cr 2 o 3 0.0006 mol. After the raw materials are fully mixed, they are sintered in air at 1250°C for 10h. The resulting product is fully ground, washed three times with deionized water, and dried at 80° C. to obtain the deep red phosphor of the present invention. The excitation spectrum and emission spectrum of this embodiment are as attached figure 1 shown.

Embodiment 2

[0034] Weigh raw material Gd 2 o 3 0.005 mol, Al 2 o 3 0.0144 mol, H 3 BO 3 0.056 mol, Cr 2 o 3 0.0006 mol, weigh 1% AlF by raw material weight 3 as a flux. After fully mixing the raw materials and flux, sinter in air at 1200°C for 5h. After the calcined product is fully ground, it is fired a second time at 1200°C for 10 hours in air. The resulting product was ground, washed three times with deionized water, and dried at 100° C. to obtain the deep red phosphor of the present invention. The excitation spectrum and emission spectrum of this embodiment are as attached figure 2 , 3 shown.

Embodiment 3

[0036] Weigh raw material Lu 2 o 3 0.005 mol, Al 2 o 3 0.0144 mol, H 3 BO 3 0.056 mol, Cr 2 o 3 0.0006 mol, weigh 5% AlF of raw material weight 3 as a flux. After fully mixing the raw materials and flux, sinter in air at 1200°C for 20h. After the calcined product is fully ground, it is washed three times with deionized water and dried at 120° C. to obtain the deep red phosphor of the present invention. The excitation spectrum and emission spectrum of this embodiment are as attached Figure 4 , 5 shown.

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Abstract

The invention discloses a deep red phosphor material for LED plant growth lamp, which is RX3(BO3)4:yCr, wherein the R is at least one of La, Lu, Gd, Y and Nd, the X is at least one of Al, Ga and Sc, and 0.005<=y<=0.2. The phosphor material uses the following substances as raw materials: oxygen-containing compounds of Cr, oxygen-containing compounds of Cr, La, Lu, Gd, y, Nd, Al, GA and SC, and oneof H3BO3 and B2O3. The raw materials are directly mixed and then burned, or a reaction flux is added, the raw materials and the reaction flux are fully and evenly mixed, and the mixture is burned; a burned product is subjected to a post-processing process to manufacture the phosphor material. The invention provides the phosphor material with stable chemical property and excellent luminous performance which can be effectively excited by blue light (380-500 nm) and emits deep red and near-infrared light in a range of 650 nm-900 nm. The phosphor material has the advantages of simple method, easyoperation, no pollution and low cost.

Description

technical field [0001] The invention relates to the technical field of solid luminescent materials, in particular to a deep red phosphor material that can be used in LED plant growth lamps and a preparation method thereof. Background technique [0002] Photosynthesis is one of the essential conditions for plant growth and development. Studies have shown that the absorption spectrum of green plants to visible light is basically the same, mainly concentrated in the purple-blue region of 400-500nm and the orange-red region of 600nm-800nm. Deep blue light (450nm) and red light (660nm) can promote photosynthesis, and deep red light (730nm) can control plant morphology and increase the biomass of leafy vegetables. Therefore, blue light, red light and deep red light play an important role in the growth and development, flowering and fruiting of plants. The content of orange-red light in sunlight is relatively small. In addition, economic crops such as vegetables and flowers in gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80F21K9/00A01G7/04
CPCA01G7/045C09K11/7708F21K9/00Y02P60/14
Inventor 邵起越石美玲董岩蒋建清
Owner SOUTHEAST UNIV
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