Method for enhancing photosynthesis spectral intensity of LED phosphor by using plasma

A photosynthesis and spectral intensity technology, applied in ion implantation plating, chemical instruments and methods, luminescent materials, etc., can solve problems such as difficulty in large-scale application, influence on luminous efficiency, color mixing uniformity obstacles, etc. Conducive to popularization and application, low cost effect

Active Publication Date: 2012-03-21
艾柯谷生态农业发展(河北)有限公司
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  • Abstract
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Problems solved by technology

However, there are also problems at the same time. The wavelength range of the current commercial red LED is in the range of 580 nm to 610 nm, which is actually not in the characteristic photosynthetic spectrum range; The preparation cost of light-emitting materials is high, and it is difficult to apply them on a large scale; the phosphors used in solid-state diode packaging are not single-matrix but mixed powders. When using high-power chips as structural units, they will encounter obstacles in the uniformity of color mixing There are problems of color reabsorption and ratio control between powders, and the luminous efficiency is greatly affected

Method used

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  • Method for enhancing photosynthesis spectral intensity of LED phosphor by using plasma
  • Method for enhancing photosynthesis spectral intensity of LED phosphor by using plasma
  • Method for enhancing photosynthesis spectral intensity of LED phosphor by using plasma

Examples

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Embodiment 1

[0020] A method for increasing the photosynthetic spectral intensity of LED phosphors by using plasma, using the metal surface plasma effect to increase the photosynthetic spectral intensity of LED phosphors, the steps are as follows:

[0021] 1) Put the glass substrate into the sputtering chamber, and the air pressure in the chamber is pumped below 2Pa. At this time, argon gas is introduced as the protective gas, the air flow is 2.5l / min, the air pressure in the chamber is maintained at 2.8Pa, and the purity is 99.99%. The silver was sputtered as the target, and sputter deposition was performed. The sputtering current is 4mA, the sputtering time is selected as 40s, and the thickness of the silver film is 12nm. Afterwards, an island-shaped silver nanofilm is obtained after heat treatment in a nitrogen atmosphere with a purity of 99.99%. The heat treatment temperature is 200°C and the time is 21mins;

[0022] 2) put Ba 3 MgSi 2 o 8 :Eu 2+ , Mn 2+ Uniformly disperse in alco...

Embodiment 2

[0024] The steps are the same as in Example 1, except that the sputtering time is 60s, and the thickness of the silver film is 20nm.

Embodiment 3

[0026] The steps are the same as in Example 1, except that the sputtering time is 90s, and the thickness of the silver film is 50nm.

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Abstract

A method for enhancing photosynthesis spectral intensity of an LED phosphor by using plasma is realized by employing metal surface plasma effect. A light source emitting blue-violet light is employed, and blue-violet light irradiates on a metal film to generate surface plasma effect, which interacts with emit photons of the phosphor, so that intensity of photosynthesis spectrum emitted by the phosphor is enhanced. The method comprises the following steps: 1) placing a glass substrate in a sputtering cavity, carrying out sputtering deposit on a metal target, and carrying out heat treatment in nitrogen to prepare an insular metal nano film; 2) dispersing the LED phosphor in a dispersing agent to form a phosphor solution, coating the phosphor solution on the glass substrate with the metal nano film prepared on by spin coating and obtaining a phosphor / Ag chemiluminescence system. The invention has advantages of simple technology, low cost, simultaneous increase of red and blue light andilluminating enhancement proportion controlled by metal sputtering time, and is easy for practice and beneficial for popularization and application.

Description

【Technical field】 [0001] The invention relates to the field of photoelectric materials and devices, in particular to a method for increasing the photosynthetic spectral intensity of LED phosphors by using plasma. 【Background technique】 [0002] Plants need sunlight to grow more luxuriantly. Different wavelengths of light have different effects on plant photosynthesis, and the wavelength of light required for plant photosynthesis is around 400-700nm. 400-500nm (blue light) and 610-720nm (red light) contribute the most to photosynthesis, called photosynthesis spectrum. Since the invention of the blue light diode chip, the solid-state light source for plant growth combined with blue and red LEDs in an array has great advantages over traditional fluorescent lamps in terms of energy saving, service life and compact volume structure. However, there are also problems at the same time. The wavelength range of the current commercial red LED is in the range of 580 nm to 610 nm, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79C23C14/34C23C14/18
Inventor 陆启飞蔡毅王达健仇坤王鹏于文慧
Owner 艾柯谷生态农业发展(河北)有限公司
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