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Light-emitting material for plant light-controlled development, preparation method of light-emitting material, and light-emitting device

The technology of a luminescent material and a luminescent device is applied in the field of luminescent materials for light-controlled development of plants and their preparation, which can solve the problems of expensive plant growth lamps and lack of luminescent materials, and achieve the effects of simple manufacturing process, low production cost and prolonging service life.

Active Publication Date: 2018-12-04
INTELLIGENT MFG INST OF HFUT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem solved by the present invention is that the plant growth lamp containing 730nm far-red light is expensive and lacks the luminescent material that can convert blue light into the Pfr state that meets the physiological activity of plants.

Method used

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  • Light-emitting material for plant light-controlled development, preparation method of light-emitting material, and light-emitting device
  • Light-emitting material for plant light-controlled development, preparation method of light-emitting material, and light-emitting device
  • Light-emitting material for plant light-controlled development, preparation method of light-emitting material, and light-emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Cr 3+ Concentration optimization:

[0056] (1) According to the chemical formula [K 3 (Al 1-x Cr x )]F 6 , the values ​​of x are 0.04, 0.06, 0.08, 0.10, KF and K 3 BF 6 The molar ratio of 2:1, respectively weighed CrF 3 , KF and K 3 AlF 3 ;

[0057] (2) CrF 3 Pour into polyvinyl fluoride reactor, according to CrF 3 , KF and K 3 AlF 3 The mass ratio of total mass to hydrofluoric acid is 40%, add hydrofluoric acid, stir to make it dissolve;

[0058] (3) Add KF to the product of step (2), and then add K after KF dissolves 3 AlF 6 , the reactor was sealed and kept stirring for 30 min;

[0059] (4) After step (3) stops stirring, carry out suction filtration to reaction product, use acetone to wash reaction product repeatedly, until no acidity is detected;

[0060] (5) Take the filter cake and dry it under vacuum at 70°C, and the obtained luminescent material is K 3 AlF 6 : Cr phosphor.

[0061] Experimental results: use X-ray diffractometer (Panalytical, ...

Embodiment 2

[0063] Optimization of the solid-liquid ratio of the reaction system: the solid-liquid ratio in the reaction system is K 3 AlF 6 , KF and CrF 3 The ratio of the mass of all solids to the mass of hydrofluoric acid liquid

[0064] (1) According to the chemical formula [K 3 (Al 0.94 Cr 0.06 )]F 6 , KF and K 3 AlF 6 The molar ratio of 2:1 weighs respectively CrF 3 , KF and K 3 AlF 3 ;

[0065] (2) CrF 3 Pour into polyvinyl fluoride reactor, according to CrF 3 , KF and K 3 AlF 3 The concentration ratio of the total mass of the solid powder to the sum of the hydrofluoric acid liquid mass is respectively 20%, 30%, 40%, 50% and 60%, adding hydrofluoric acid and stirring to dissolve it;

[0066] (3) Add KF to the product of step (2), and then add K after KF dissolves 3 AlF 6 , the reactor is sealed, stirred and reacted for 30min;

[0067] (4) After step (3) stops stirring, carry out suction filtration to reaction product, use acetone to wash reaction product repeatedl...

Embodiment 3

[0072] Optimizing Matrix Components:

[0073] (1) with CrF 3 , KF, K 3 AlF 3 and Na 3 AlF 3 as raw material, adjust K 3 AlF 6 with Na 3 AlF 6 The proportion of Cr 3+ The concentration is set to 6%, KF and ((1-x)K 3 AlF 6 +xNa 3 AlF 6 ) The mol ratio is set to 2:1;

[0074] (2) According to the chemical formula (K 1-x Na x ) 3 al 0.94 Cr 0.06 f 6 , the value of x is 0.1, 0.2, 0.3, 0.4, 0.5, weigh CrF 3 、K 3 AlF 3 and Na 3 AlF 3 , and follow KF with K 3 AlF 6 and Na 3 AlF 6 The mol ratio of sum is 2:1 and takes by weighing KF;

[0075] (3) CrF3 is poured into the polyvinyl fluoride reactor, and hydrofluoric acid is added according to the solid-to-liquid ratio of the system being 40%, and stirred to make it dissolve;

[0076] (4) Add KF to the product of step (2), and then add Na after KF dissolves 3 AlF 6 , the reactor was sealed and kept stirring for 30 min;

[0077] (5) After step (3) stops stirring, carry out suction filtration to reaction prod...

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Abstract

The invention discloses a light-emitting material for plant light-controlled development, a preparation method of the light-emitting material, and a light-emitting device, and relates to the fields ofsolid-state semiconductor illumination and photosynthetic agriculture. The invention is provided on the basis of the problems that the cost of a plant growth lamp containing 730-nm far-red light is high, and a light-emitting material capable of converting blue light into a light which meets the requirement of a plant in a physiological activity Pfr state does not exist. The chemical general formula of the light-emitting material is A<3>BF<6>:Cr, wherein A is one or more selected from monovalent metal ions comprising Li, Na, K, Rb and Cs, and B is one or more selected from trivalent metal ionscomprising Al, Ga, Sc, Y and La. According to the invention, the beneficial effects are as follows: the emission wavelength of the far-red light-emitting material for plant light-controlled development provided by the invention is matched with the absorption wavelength of the plant phytochrome of a physiological activity Pfr state, the production cost of using a far-red light fluorescent materialpackaged LED device is lower than the production cost of using a far-red light LED chip, the service life of the existing LED blue-light chip growing process and equipment can be prolonged, the preparation method is simple, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the fields of solid-state semiconductor lighting and photosynthetic agriculture, in particular to a luminescent material used for light-controlled growth of plants and its preparation method and application. Background technique [0002] Light is not only the energy source for plant photosynthesis, but also acts as an important environmental signal source to regulate plant photomorphogenesis, gene expression, enzyme activity and metabolism. Optical agriculture mainly uses artificial light sources to provide nutrients for photosynthesis or regulate plant germination, growth, flowering and other activities through photoperiod to promote growth and increase productivity. The process of light-controlled plant growth, development and differentiation is usually called photomorphogenesis, also known as photo-controlled development. [0003] Photomorphogenesis and photosynthesis in plants are two independent processes. In the process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64C09K11/80F21K9/90F21Y115/10
CPCC09K11/0883C09K11/685C09K11/7734F21K9/90F21Y2115/10
Inventor 陈雷何良锐陈杰田云飞王家龙程鹏张秋红倪海勇
Owner INTELLIGENT MFG INST OF HFUT
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