Preparation method of single-matrix carbon quantum dot white light fluorescent powder

A carbon quantum dot and single-matrix technology, applied in the field of preparation of single-matrix carbon quantum dot white light phosphors, can solve the problems of difficult preparation, low purity, and fluorescence quenching, and achieve advanced technology, good purity, and accurate and detailed data Effect

Active Publication Date: 2015-08-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

However, its preparation is difficult, its purity is low, and it is prone to fluorescence quenching caused by agglomeration, which limits its application in white light-emitting diodes.

Method used

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  • Preparation method of single-matrix carbon quantum dot white light fluorescent powder
  • Preparation method of single-matrix carbon quantum dot white light fluorescent powder
  • Preparation method of single-matrix carbon quantum dot white light fluorescent powder

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with accompanying drawing:

[0056] figure 1 As shown, it is a state diagram for the preparation of a single-matrix carbon quantum dot aqueous solution, and the positions of each part must be correct, proportioned according to the amount, and operated in sequence.

[0057] Quantities of the chemical substances used in the preparation are determined according to a preset range, with grams and milliliters as measurement units.

[0058] The preparation of the single-matrix carbon quantum dot aqueous solution is carried out in a hydrothermal reactor, which is completed under the state of heating and hydrothermal synthesis;

[0059] The heating furnace 1 is vertical, the upper part of the heating furnace 1 is a furnace cover 2, and the lower part is a furnace seat 3. The inside of the heating furnace 1 is a furnace chamber 13, and a workbench 4 is arranged on the inner bottom of the furnace chamber 13. On ...

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Abstract

The invention discloses a preparation method of single-matrix carbon quantum dot white light fluorescent powder to solve the problems that the single-matrix carbon quantum dot white light fluorescent powder is big in preparation difficulty, low in purity and easy to cause fluorescence quenching due to agglomeration. The single-matrix carbon quantum dot white light fluorescent powder is prepared by taking citric acid as a carbons source, L-cysteine as an additive and deionized water as a solvent, adopting a hydrothermal synthesis method to prepare a single-matrix carbon quantum dot aqueous solution, and performing closed reaction, injection filtration, dialysis, gelatinization and vacuum drying. The preparation method is advanced in process and accurate and informative in data, the prepared product is dark-brown powder, the particle diameter of the powder is less than or equal to 8nm, the color coordinates comprise x=0.325 and y=0.356, the prepared product emits white light and is good in purity reaching 98.5%, and the fluorescence quenching caused by agglomeration is avoided, so that the prepared method can be used for preparing white light light-emitting diodes and is a very ideal method for preparing the single-matrix carbon quantum dot white light fluorescent powder.

Description

technical field [0001] The invention relates to a preparation method of a single-matrix carbon quantum dot white light phosphor, and belongs to the technical field of preparation and application of nano carbon material carbon dots. Background technique [0002] Semiconductor solid-state light-emitting diodes have the advantages of safety, energy saving, long life, fast response, and high luminous intensity, and have broad prospects in reducing lighting energy consumption and providing high-quality light sources. [0003] Single-matrix white light-emitting diodes mostly use rare-earth-based luminescent materials and semiconductor quantum dots as phosphors, but rare-earth-based luminescent materials are expensive and have low light efficiency, and semiconductor quantum dots contain toxic elements such as Cd, Pb, and Hg, which cannot meet the requirements of single-matrix white light emission. Requirements for diodes in terms of energy saving and environmental protection. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B31/02
CPCY02B20/00
Inventor 刘旭光杨永珍赵永强王亚玲张峰
Owner TAIYUAN UNIV OF TECH
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