Nitride red light conversion film and preparation method thereof

A thin-film preparation and nitride technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as poor matching, poor stability, and short fluorescence lifetime, and achieve low doping ratio, low synthesis temperature, and high luminous efficiency. Effect

Inactive Publication Date: 2016-02-03
FOSHAN ONMILLION NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are still many problems in the light conversion agents that can be used to prepare light conversion masterbatches and light conversion films on the market: (1) Poor matching
(2) The cost of preparation is high, so it is expensive and difficult to accept in the market, which is currently the biggest obstacle hindering the application of light-changing agents
(3) poor stability
(4) short fluorescence lifetime
Most of the patents and related documents do not report the fluorescence lifetime, and the fluorescence half-life reported by individual reports is only about half a year. Since the renewal time of the agricultural film is 9 to 12 months, it cannot be synchronized with the service life of the plastic film.

Method used

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  • Nitride red light conversion film and preparation method thereof
  • Nitride red light conversion film and preparation method thereof
  • Nitride red light conversion film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Synthesis of nitride red light conversion agent: weigh Ca respectively according to stoichiometric ratio 3 N 2 ,Sr 3 N 2 ,ZnO,AlN,Si 3 N 4 , Eu 2 o 3 After fully mixing, transfer it to a boron nitride crucible for heating, then transfer it to a graphite furnace, and react at 1700°C for 4 hours under a high-purity nitrogen environment. After cooling, perform powder selection, crushing, and sieving to obtain sample A1. A1 is red.

[0054] The composition formula of sample A1 is: (Ca 0.950 Sr 0.04 Zn 0.010 ) 0.988 AlSiN 3 :Eu 0.012

[0055] For absorption and excitation spectra see figure 1 . figure 1 It shows that the red light conversion agent (A1) can effectively absorb ultraviolet light and yellow-green light that are not absorbed or are weakly absorbed by plant photosynthesis, and emit red light with a wavelength of 600nm-780nm required by plant photosynthesis. The action spectra are in good agreement.

[0056] (2) Preparation of nitride light con...

Embodiment 2

[0061] (1) Synthesis of nitride red light conversion agent: weigh Ca respectively according to stoichiometric ratio 3 N 2 ,Sr 3 N 2 , BaCO 3 ,MgO,AlN,Si 3 N 4 , Eu 2 o 3 ,NH 4 After Cl is fully mixed, heat it in a molybdenum nitride crucible, then transfer it to a graphite furnace, and react at 1850°C for 4 hours in a high-purity nitrogen environment. After cooling, perform powder selection, crushing, and sieving to obtain samples. It is orange-red, and the general formula of the sample composition is: (Ca 0.800 Sr 0.050 Ba 0.100 Mg 0.050 ) 0.980 AlSiN 3 :Eu 0.018 , Cl - 0.002

[0062] Experiments have proved that the excitation spectrum of the sample is the same as that of A1, which can effectively absorb ultraviolet light and yellow-green light that are not absorbed or are weakly absorbed by plant photosynthesis, and emit red light with a wavelength of 600nm-780nm required by plant photosynthesis. It is in good agreement with the photosynthesis spectrum.

...

Embodiment 3

[0068] (1) Synthesis of nitride red light conversion agent: weigh Ca respectively according to stoichiometric ratio 3 N 2 ,ZnO,AlN,Si 3 N 4 , Eu 2 o 3 , After KCl is fully mixed, transfer it to a molybdenum nitride crucible for heating, then transfer it to a graphite furnace, and react at 1800°C for 6 hours under a high-purity nitrogen environment. After cooling, perform powder selection, crushing, and sieving to obtain a sample. The sample is orange-red, and the general formula of the sample composition is: (Ca 0.990 Zn 0.010 ) 0.985 AlSiN 3 :Eu 0.012 , K + 0.003

[0069] Experiments have proved that the excitation spectrum of the sample is the same as that of A1, which can effectively absorb ultraviolet light and yellow-green light that are not absorbed or are weakly absorbed by plant photosynthesis, and emit red light with a wavelength of 600nm-780nm required by plant photosynthesis. It is in good agreement with the photosynthesis spectrum.

[0070] (2) Prepara...

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Abstract

The present invention discloses a nitride red light conversion film, which is characterized by comprising, by weight, 0.1-2.0% of a nitride red light conversion agent, 0.1-5.0% of a third auxiliary agent, and the balance of film substrate, wherein the composition general formula of the nitride red light conversion agent is A1-x-yBCN3:REx,Tny. According to the present invention, the nitride red light conversion agent is incorporated into the film, especially the agricultural film, such that the film has a light conversion effect, and the light conversion agent application is convenient; and the nitride red light conversion film and the plant photosynthesis spectrum have good matching property, and the nitride red light conversion film can absorb 260-620 nm wavelength light harmful for plants, and emits 600-780 nm wavelength red light required by plant photosynthesis.

Description

technical field [0001] The invention relates to a nitride red light conversion film and a preparation method thereof. Background technique [0002] The light-changing agent is to convert the ultraviolet, purple and green light in sunlight that are useless to plant photosynthesis into red and blue light that can promote plant growth. There are few research reports on blue light-changing agents. The research on red light-changing agents is mainly based on rare earth organic complexes. Some documents have proposed that red light-changing agents can promote the growth of plants. [0003] However, there are still many problems in the light conversion agents currently on the market that can be used to prepare light conversion masterbatches and light conversion films: (1) Poor matching. Especially for organic complex light conversion agents, the main emission peak is generally around 610nm, which is quite different from the absorption spectrum range of plants at 620-680nm. (2) Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L23/12C08K3/34C08J3/22C09K11/64C09K11/66C09K11/02
CPCC08L23/0853C08J3/226C08J5/18C08J2323/06C08J2323/08C08J2323/12C08J2423/06C08J2423/12C08L23/06C08L23/12C08L2203/16C08L2205/02C08L2205/025C08L2205/035C09K11/025C09K11/64C09K11/66
Inventor 胡广齐陈焰李金芳梁敏婷
Owner FOSHAN ONMILLION NANO MATERIALS
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