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Nanomaterial capable of emitting white fluorescent light and preparation method thereof

A technology of nanomaterials and fluorescence, applied in the preparation of nanomaterials, in the field of nanomaterials, can solve the problems of high cost, complicated preparation process, self-absorption of multi-layer structure, etc., and achieve low cost, simple preparation process and good repeatability Effect

Inactive Publication Date: 2013-06-19
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the existing technology, most of the three primary colors are mixed to obtain white light, but the preparation process of this method is complicated, difficult to control, and the cost is high, and the multi-layer structure is easy to cause self-absorption, resulting in relatively low quantum efficiency.

Method used

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  • Nanomaterial capable of emitting white fluorescent light and preparation method thereof
  • Nanomaterial capable of emitting white fluorescent light and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Weigh 1.05g of zinc acetate and dissolve it in 50mL of hydroalcoholic solution, the volume ratio of water to absolute ethanol is 3:1;

[0025] Second step: 0.735g manganese acetate and 0.499g copper acetate are dissolved in 60mL and 500mL of hydroalcoholic solution respectively, then

[0026] Then take out 0.5mL and 1mL respectively from the manganese acetate solution and the copper acetate solution, and pour them into the zinc acetate solution in (1). At this time, in the prepared mixed solution, the molar ratio of manganese and zinc is about 0.5%, and the molar ratio of copper and zinc is about 0.1%;

[0027] Step 3: Use a magnetic stirrer to vigorously stir the mixed solution prepared above for one hour at room temperature;

[0028] Step 4: Weigh 0.5g of PVP, add it to the mixed solution that has been stirred for one hour, and continue magnetic stirring for one hour. The PVP (polyvinyl pyrrolidone) added in this step is used as a surface modifier, which can...

Embodiment 2

[0034] Step 1: Weigh 1.05g of zinc acetate and dissolve it in 50mL of hydroalcoholic solution, the volume ratio of water to absolute ethanol is 3:1;

[0035] Second step: 0.735g manganese acetate and 0.499g copper acetate are dissolved in 60mL and 500mL of hydroalcoholic solution respectively, then

[0036] Then take out 0.5mL and 1mL respectively from the manganese acetate solution and the copper acetate solution, and pour them into the zinc acetate solution in (1). At this time, in the prepared mixed solution, the molar ratio of manganese and zinc is about 0.5%, and the molar ratio of copper and zinc is about 0.1%;

[0037] Step 3: Use a magnetic stirrer to vigorously stir the mixed solution prepared above for one hour at room temperature;

[0038] Step 4: Weigh 0.5g of PVP, add it to the mixed solution that has been stirred for one hour, and continue magnetic stirring for one hour. The PVP added in this step is used as a surface modifier, which can effectively prevent qua...

Embodiment 3

[0044] Step 1: Weigh 1.05g of zinc acetate and dissolve it in 50mL of hydroalcoholic solution, the volume ratio of water to absolute ethanol is 3:1;

[0045] Second step: 0.735g manganese acetate and 0.499g copper acetate are dissolved in 60mL and 500mL of hydroalcoholic solution respectively, then

[0046] Then take out 0.5mL and 1mL respectively from the manganese acetate solution and the copper acetate solution, and pour them into the zinc acetate solution in (1). At this time, in the prepared mixed solution, the molar ratio of manganese and zinc is about 0.5%, and the molar ratio of copper and zinc is about 0.1%;

[0047] Step 3: Use a magnetic stirrer to vigorously stir the mixed solution prepared above for one hour at room temperature;

[0048] Step 4: Weigh 0.5g of PVP, add it to the mixed solution that has been stirred for one hour, and continue magnetic stirring for one hour. The PVP added in this step is used as a surface modifier, which can effectively prevent qua...

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Abstract

The invention discloses a nanomaterial capable of emitting white fluorescent light and a preparation method thereof, and belongs to the technical field of a nano semiconductor light emitting material. The nanomaterial is zinc sulfide semiconductor quantum dot co-doped by copper atoms and manganese atoms, wherein the original molar ratio of the copper atoms to the zinc atoms is 0.1 to 0.2 percent;the original molar ratio of the manganese atoms to the zinc atoms is 0.4 to 0.6 percent; and PVP is added to slow down the chemical reaction and prevent aggregation of the quantum dots during the reaction. The main emission peak energy ranges of the nanomaterial are from 2.86 to 3.17eV, from 2.35 to 2.65eV and from 2.01 to 2.25eV. The semiconductor quantum dot material capable of emitting the white light has the advantages of simple preparation process, high repetitiveness, low cost and innocuity. The chrominance of the white light emitted by the prepared quantum dot is difficultly influencedby external factors and is very stable.

Description

technical field [0001] The invention relates to a nano material, specifically a nano material capable of emitting white fluorescence, and a preparation method of the nano material; it belongs to the technical field of nano semiconductor light-emitting materials. Background technique [0002] In the past decade, semiconductor nanomaterials have attracted more and more attention due to their superior physical and chemical properties. Especially the smaller the size of the material, the more obvious its quantum confinement effect, and then exhibit various unique and novel optical and electrical properties. Therefore, three-dimensionally confined quantum dot materials have naturally become a hot spot of concern. Compared with organic luminescent materials, quantum dot luminescent materials can overcome problems such as thermal decay and photochemical decay, and greatly improve the service life during the period. Therefore, quantum dot luminescent materials have broad applicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/58
CPCY02B20/181Y02B20/00
Inventor 侯士丽茅惠兵王基庆朱自强
Owner EAST CHINA NORMAL UNIV
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