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Carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and preparing method thereof

A carbon quantum dot and carboxyl-containing technology, applied in the field of quantum dot light emission, can solve the problems of low quantum efficiency, complex preparation method, low color purity, etc., and achieve the effects of low cost, high color purity and high fluorescence quantum efficiency.

Inactive Publication Date: 2016-04-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of low quantum efficiency, short lifespan, low color purity, complicated preparation method and high cost of existing red light-emitting materials, so as to provide carboxyl-containing carbon quantum lights with reddish-orange fluorescence. Spot solution and preparation method thereof

Method used

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  • Carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and preparing method thereof
  • Carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and preparing method thereof
  • Carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and preparing method thereof

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specific Embodiment approach 1

[0011] Specific implementation mode one: refer to Figure 1 to Figure 3 Specifically illustrate this embodiment, the preparation method of the reddish-orange fluorescent carboxyl-containing carbon quantum dot solution described in this embodiment, the method includes the following steps:

[0012] Step 1. Dissolve 1mmol~4mmol maleic anhydride and 1mmol~4mmol o-phenylenediamine in 10mL~15mL absolute ethanol to obtain a mixed solution, and then put the mixed solution into a polytetrafluoroethylene reactor; step 2 1. Ultrasonic the reaction kettle in step 1 for 10min to 30min, and then stir the mixed solution for 10min to 30min; step 3, put the reaction kettle in step 2 into a steel kettle, and place the steel kettle at a temperature of 180°C to 200°C 10h to 15h in the environment, and then cooled to room temperature naturally, and the reactant was taken out; step 4, the reactant obtained in step 3 was filtered with a 200nm ultrafiltration membrane to obtain a reddish-orange fluor...

specific Embodiment approach 2

[0014] Specific embodiment two: This embodiment is to further illustrate the preparation method of the reddish-orange fluorescent carboxyl-containing carbon quantum dot solution described in specific embodiment one. In this embodiment, the polytetrafluoroethylene reaction described in step one The volume of the kettle is 20mL.

specific Embodiment approach 3

[0015] Specific embodiment three: This embodiment is to further illustrate the preparation method of the reddish-orange fluorescent carboxyl-containing carbon quantum dot solution described in specific embodiment one. In this embodiment, the maleic anhydride described in step one The ratio of substance to o-phenylenediamine is 1:1.

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Abstract

The invention discloses a carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and a preparing method thereof and relates to the technical field of quantum dot luminescence. The carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and the preparing method thereof aim to solve the problems of existing red-light-emitting materials that quantum efficiency is low, service life is short, and color purity is low, and the problems of existing red-light-emitting material preparing methods that complexity is high and cost is high. Maleic anhydride and o-phenylenediamine are dissolved in absolute ethyl alcohol and placed in a polytetrafluoroethylene reaction still; ultrasonic treatment and stirring are conducted in sequence; the reaction still is placed in a steel kettle, heating and natural cooling are conducted, and then a reactant is taken out after temperature is reduced to be room temperature; the reactant is filtered, and then the carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light is obtained. The method is simple, easy to operate, low in cost and high in yield. The carbon quantum dot solution obtained with the method is high in fluorescence quantum efficiency, high in stability, capable of being placed in the air for a long time, and high in color purity. The carbon quantum dot solution is suitable for serving as a red-light-emitting material, and the method is suitable for preparing the carbon quantum dot solution which emits reddish orange fluorescent light.

Description

technical field [0001] The invention relates to the technical field of quantum dot luminescence. Background technique [0002] At present, great achievements have been made in the development of organic small molecule materials, and a series of classic compounds have appeared in green light, blue light and red light. As far as the degree of industrialization is concerned, representative materials have been developed for green light materials and blue light materials, while red light materials are much inferior in comparison. A series of problems such as low device efficiency, short life, and low color purity have been plagued by the practical application of red light devices, which makes the development of red light materials particularly important. Nowadays, scientific research institutions at home and abroad are developing their own representative red light materials to solve the difficulties faced by red light materials. The synthesis process of existing red luminescent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65
CPCC09K11/65
Inventor 杨玉林石岩范瑞清王平
Owner HARBIN INST OF TECH
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