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A kind of luminescent microsphere and preparation method thereof

A technology of luminescent microspheres and microspheres, which is applied in the preparation of microspheres, luminescent materials, and microcapsule preparations. It can solve the problems of poor stability of organic fluorescent substances, low display color gamut, and wide half-peak width. The effect of high fluorescence efficiency

Active Publication Date: 2022-06-28
TIANJIN NAMEI NAMI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The aluminosilicate phosphor also has the characteristics of the above-mentioned aluminate and silicate matrix, such as: CN1995276A, CN10142911A, CN101595201A, but the aluminosilicate matrix phosphor is still relatively small
[0003] In addition, other fluorescent powders have a wide half-maximum width, low display color gamut, poor stability of organic fluorescent substances, and inorganic quantum dots also need the protection of water and oxygen, which have many limitations. In view of this, the present invention is proposed

Method used

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  • A kind of luminescent microsphere and preparation method thereof
  • A kind of luminescent microsphere and preparation method thereof
  • A kind of luminescent microsphere and preparation method thereof

Examples

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Embodiment 1

[0032] 1. Preparation of cadmium oxide-doped silica microspheres

[0033] 1) cadmium nitrate is dissolved in the aqueous solution of ethanol, the mass concentration of ethanol is 50%, the mass concentration of cadmium nitrate is 10%, obtains cadmium nitrate solution;

[0034] 2) The three-dimensional macroporous carbon template is immersed in the cadmium nitrate solution obtained in step 1), and after drying, the template on which the cadmium nitrate is deposited is obtained. The mass ratio of cadmium nitrate deposited in the template was adjusted to 10% by repeating this step repeatedly. Then the template is isolated from the air and heated to 450°C, cadmium nitrate is decomposed into cadmium oxide and nitrogen dioxide, and cadmium oxide is deposited in the template;

[0035] 3) tetraethylorthosilicate is dissolved in the mixed solution of ethanol, water and hydrochloric acid, the mass concentration of tetraethylorthosilicate is 40%, the mass concentration of ethanol is 58%,...

Embodiment 2

[0043] 1. Preparation of cadmium oxide-doped silica microspheres

[0044] 1) cadmium nitrate is dissolved in the aqueous solution of ethanol, the mass concentration of ethanol is 50%, the mass concentration of cadmium nitrate is 10%, obtains cadmium nitrate solution;

[0045] 2) The three-dimensional macroporous carbon template is immersed in the cadmium nitrate solution obtained in step 1), and after drying, the template on which the cadmium nitrate is deposited is obtained. The mass ratio of cadmium nitrate deposited in the template was adjusted to 8% by repeating this step repeatedly. Then the template is isolated from the air and heated to 420°C, cadmium nitrate is decomposed into cadmium oxide and nitrogen dioxide, and cadmium oxide is deposited in the template;

[0046] 3) tetraethylorthosilicate is dissolved in the mixed solution of ethanol, water and hydrochloric acid, the mass concentration of tetraethylorthosilicate is 40%, the mass concentration of ethanol is 58%, ...

Embodiment 3

[0053] 1. Preparation of cadmium oxide-doped silica microspheres

[0054] 1) cadmium nitrate is dissolved in the aqueous solution of ethanol, the mass concentration of ethanol is 50%, the mass concentration of cadmium nitrate is 10%, obtains cadmium nitrate solution;

[0055] 2) The three-dimensional macroporous carbon template is immersed in the cadmium nitrate solution obtained in step 1), and after drying, the template on which the cadmium nitrate is deposited is obtained. The mass ratio of cadmium nitrate deposited in the template was adjusted to 12% by repeating this step repeatedly. Then the template is isolated from the air and heated to 480°C, cadmium nitrate is decomposed into cadmium oxide and nitrogen dioxide, and cadmium oxide is deposited in the template;

[0056] 3) tetraethylorthosilicate is dissolved in the mixed solution of ethanol, water and hydrochloric acid, the mass concentration of tetraethylorthosilicate is 40%, the mass concentration of ethanol is 58%,...

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Abstract

The invention belongs to the technical field of luminescent materials, and in particular relates to a luminescent microsphere and a preparation method thereof. The preparation method comprises: 1) preparing cadmium oxide-doped silica microspheres; 2) putting the silica microspheres into a mixed solution of octadecene / oleic acid or trioctylamine / oleic acid and heating to boiling, the microspheres swell at high temperature, and oleic acid penetrates into the microspheres to react with CdO to form a silica suspension adsorbed with organic cadmium; 3) adding a selenium precursor to the obtained silica suspension adsorbed with organic cadmium, and The adsorbed organic cadmium reacts to form CdSe to obtain luminescent microspheres. The luminescent microspheres provided by the present invention have high fluorescence efficiency and good stability, are not protected by barrier materials such as barrier films, and can be directly used in light conversion materials such as high-color gamut luminescent films, luminescent panels, Mini-Led and Micro-Led. Wait.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, in particular to a luminescent microsphere and a preparation method thereof. Background technique [0002] At present, the realization of white light LED is the blue GaInN chip excited YAG (Y 3 Al 5 O 12 :Ce 3+ ) phosphor produces yellow light, which is mixed with the blue light of the chip to form white light. Due to the lack of red light components in the emission spectrum of YAG phosphors and the defects of low color rendering index and high color temperature, the near-ultraviolet (UVLED) chip excited phosphors to achieve white LEDs have attracted much attention. In this mode, phosphors with more comprehensive emission wavelengths can be selected to formulate the light color of white LEDs, so that the color rendering index and color temperature of white LEDs can be effectively improved. There are many kinds of near-ultraviolet excited phosphors, among which aluminate and sil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/88B01J13/02H01L33/50
CPCC09K11/883B01J13/02H01L33/502C09K11/02Y02B20/00C09K11/025H05B33/02H05B33/10H05B33/145H05B33/22
Inventor 刘光赵宝杰刘海鹏王奕
Owner TIANJIN NAMEI NAMI TECH CO LTD
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