Fluorescent light-emitting material and preparation method thereof

A luminescent material and fluorescent technology, which is applied in the field of fluorescent luminescent materials and their preparation, can solve the problems of low light efficiency of white light, and achieve the effects of high luminous efficiency, good dispersion and stability, and simple preparation methods

Active Publication Date: 2012-10-10
JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a variety of phosphors of different colors can be excited by ultraviolet light, in order to obtain white light, the mass ratio of the three primary color phosphors of blue, green and red must be precisely adjusted, and the three primary color phosphors of blue, green and red Light reabsorption and fluorescence resonance energy transfer are prone to occur between them, and this self-absorption, scattering and energy transfer lead to low light efficiency of the final emitted white light

Method used

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  • Fluorescent light-emitting material and preparation method thereof
  • Fluorescent light-emitting material and preparation method thereof
  • Fluorescent light-emitting material and preparation method thereof

Examples

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preparation example Construction

[0030] The invention also discloses a method for preparing a fluorescent light-emitting material, which includes the following steps:

[0031] In an inert gas atmosphere, the Cd-containing compound, the In-containing compound, the sulfur powder and the organic coating agent react in liquid olefin to obtain a fluorescent light-emitting material with an atomic ratio shown in formula (I):

[0032] CD x InS 1.5+x (I);

[0033] Among them, 0

[0034] The present invention uses a compound containing Cd, a compound containing In and sulfur powder as raw materials, and the compound containing Cd is preferably one or more of cadmium nitrate, cadmium chloride, cadmium iodide, cadmium acetate and cadmium acetylacetonate .

[0035] The compound containing In is preferably one or more of indium nitrate, indium chloride, indium iodide, indium acetate and indium acetylacetonate.

[0036] In the present invention, t...

Embodiment 1

[0046] Add 40mmol of sulfur powder into 80mL of 1-octadecene, and ultrasonically disperse at room temperature to dissolve the sulfur powder in 1-octadecene to obtain a sulfur solution;

[0047]Add 0.02mmol of cadmium acetate, 0.1mmol of indium acetate, and 0.4mmol of oleic acid into 4mL of 1-octadecene, and heat to 190°C under the protection of nitrogen to dissolve to form a transparent solution;

[0048] Seal the above transparent solution, use nitrogen to remove the air, and heat to 240°C under the protection of nitrogen, keep it for 10 minutes, add 0.3mL of sulfur solution to react for 3 minutes, and cool to room temperature to obtain a fluorescent light-emitting material, the atomic ratio of which is Cd0. 2InS1.7.

[0049] The metal content in the fluorescent luminescent material prepared in Example 1 was measured by inductively coupled plasma mass spectrometry (ICP-MS), and the results are shown in Table 1. It can be seen that the fluorescent luminescent material was prep...

Embodiment 2

[0054] Add 40mmol of sulfur powder into 80mL of 1-octadecene, and ultrasonically disperse at room temperature to dissolve the sulfur powder in 1-octadecene to obtain a sulfur solution;

[0055] Add 0.05mmol of cadmium acetate, 0.1mmol of indium acetate, and 0.4mmol of oleic acid into 4mL of 1-octadecene, and heat to 190°C under the protection of nitrogen to dissolve to form a transparent solution;

[0056] Seal the above transparent solution, use nitrogen to remove the air, and heat to 240°C under the protection of nitrogen, keep it for 10 minutes, add 0.4mL sulfur solution to react for 3 minutes, and cool to room temperature to obtain a fluorescent light-emitting material, the atomic ratio of which is Cd 0.5 InS 2 .

[0057] The metal content in the fluorescent luminescent material prepared in Example 2 was measured by inductively coupled plasma mass spectrometry (ICP-MS), and the results are shown in Table 1. It can be seen that the fluorescent luminescent material was prep...

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Abstract

The invention provides a fluorescent light-emitting material which has the atomic ratio shown in a formula (I): CdxInS[1.5+x] (I). The invention also provides the preparation method of the fluorescent light-emitting material. The preparation method comprises the steps of reacting a compound containing Cd, a compound containing In and sulfur powder with an organic cladding agent in liquid olefin at the inert gas atmosphere so as to obtain the fluorescent light-emitting material with the atomic ratio shown in the formula (I). The fluorescent light-emitting material provided by the invention is excited by ultraviolet light to emit white light; because the fluorescent light-emitting material has a single component and can effectively prevent self-absorption, scattering and energy transfer, the fluorescent light-emitting material provided by the invention is high in light-emitting efficiency after being excited by ultraviolet light; an experiment result shows that after the fluorescent light-emitting material provided by the invention is excited by ultraviolet light, the color coordinate of the material is positioned in a white light region of a chromaticity diagram; and additionally, the preparation method of the fluorescent light-emitting material provided by the invention is simple, and the obtained fluorescent light-emitting material has good scattering property and stability.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to fluorescent luminescent materials and a preparation method thereof. Background technique [0002] White light-emitting diode (LED) is a semiconductor device that converts electrical energy into visible light. It has the advantages of non-toxicity, long life, high efficiency and energy saving, all solid state, low working voltage, strong shock resistance and good safety. It has been used in liquid crystal displays. Backlights, indicator lights, and general lighting have been applied in many fields, and will replace various bulbs and fluorescent lamps currently used as a new generation of green lighting sources, which have extensive and far-reaching significance for energy saving, environmental protection, and improving people's quality of life. . [0003] The prior art discloses a variety of deployment methods for white LEDs, mainly including the following three: [0004] (1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62
Inventor 杨秀荣冯建杨帆
Owner JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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