Color-temperature-adjustable fluorescent-phosphorescent four-mode white-light-emitting carbon dot and preparation method and application thereof

A color temperature and white light technology is applied in the field of carbon dots that emit white light in four modes of color temperature-tunable fluorescent phosphorescence and can solve the problems of single color temperature and difficulty in realizing white light emission, and achieve the effects of convenient operation, low cost and high yield

Active Publication Date: 2022-05-13
QILU UNIV OF TECH
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the research of the present inventors, the existing fluorescent and phosphorescent single-component white light materials have the problem of single color temperature, and it is difficult to realize white light emission with adjustable color temperature.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Color-temperature-adjustable fluorescent-phosphorescent four-mode white-light-emitting carbon dot and preparation method and application thereof
  • Color-temperature-adjustable fluorescent-phosphorescent four-mode white-light-emitting carbon dot and preparation method and application thereof
  • Color-temperature-adjustable fluorescent-phosphorescent four-mode white-light-emitting carbon dot and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0047] The second embodiment of the present invention provides a method for preparing the above-mentioned carbon dots with adjustable color temperature fluorescent phosphorescent four-mode emitting white light. The carbon source precursor is subjected to hydrothermal reaction to obtain carbon dots, wherein the carbon source precursor Including 1,3-propanediamine and hydroxyethylidene diphosphonic acid.

[0048] In the present invention, by changing the hydrothermal reaction temperature, carbon dots with different degrees of carbonization can be obtained, that is, the carbon dots can be obtained. If the precursor is replaced, carbon dots with different carbonization degrees will not be obtained, so it is difficult to adjust the intrinsic state emission of the carbon dots, and then white light emission with adjustable color temperature cannot be realized.

[0049] The hydrothermal reaction in the present invention refers to a reaction that takes water as a solvent and is carried...

Embodiment 1

[0067] Example 1. Preparation of fluorescent phosphorescent four-mode emitting white light carbon dots

[0068] Measure three parts of 3.2 mL of 1,3-propylenediamine and three parts of 0.8 g of ethylidene diphosphonic acid, add the measured reagents to three 50 mL polytetrafluoroethylene liners, and add 20 mL of deionized Water was dissolved by ultrasonic stirring. Put the lining into the reaction kettle, and heat it at 190°C, 210°C, and 220°C for 9 hours in a drying oven. After the reaction is completed, the reaction kettle is naturally cooled to room temperature. Open the reaction kettle to take out the lining, and then use the drying oven to Heating at 200°C for 6 hours, the carbon dot solids with light yellow appearance were obtained respectively, and the carbon dots obtained at 190°C were recorded as CDs 190 , the carbon dots obtained at 210°C are denoted as CDs 210 , the carbon dots obtained at 220°C are denoted as CDs 220 ,Such as figure 1 (a) shown.

[0069] The c...

Embodiment 2

[0071] Example 2, Preparation of Fluorescent Phosphorescent Four-mode Emitting White Light Carbon Dots

[0072] The specific implementation is the same as in Example 1, except that the 1,3-propanediamine and hydroxyethylidene diphosphonic acid are 0.8 mL and 0.8 g, respectively. Fluorescence and phosphorescence four-mode emission cannot be realized, only single fluorescence and single phosphorescence emission can be realized.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
purityaaaaaaaaaa
purityaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the fields of fluorescent materials, phosphorescent materials and illumination, and particularly relates to color-temperature-adjustable fluorescent and phosphorescent four-mode white light emitting carbon dots as well as a preparation method and application thereof. The carbon dots have C-C bonds, C = C bonds, C-O bonds, C-N bonds, C-P bonds, N-H bonds, P = O bonds and P-O bonds, and the average particle size distribution is 1.0-4.5 nm; when excited by ultraviolet light, the fluorescent probe generates double fluorescence emission peaks and double phosphorescence emission peaks; the wavelengths of the double fluorescence emission peaks are 420 to 440 nm and 465 to 520 nm respectively, and the wavelengths of the double phosphorescence emission peaks are 545 to 550 nm and 525 to 610 nm respectively. The preparation method comprises the steps that a carbon source precursor is subjected to a hydrothermal reaction to obtain the carbon dots, and the carbon source precursor comprises 1, 3-propane diamine and 1-hydroxyethylidene-1, 1-diphosphonic acid. The color-temperature-adjustable fluorescent and phosphorescent four-mode emission white light carbon dot provided by the invention can realize color-temperature-adjustable white light emission, and is more suitable for the field of illumination.

Description

technical field [0001] The invention belongs to the field of fluorescent materials, phosphorescent materials and lighting, and in particular relates to carbon dots with adjustable color temperature fluorescent phosphorescent four-mode emitting white light, a preparation method and an application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Compared with traditional fluorescent lamps and incandescent lamps, fluorescent phosphorescent single-component white light-emitting diodes have the advantages of no phase segregation and color aging, high energy conversion efficiency, low calorific value, and good stability. According to the research of the present inventor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00C09K11/65H01L33/50
CPCC09K9/00C09K11/65H01L33/504
Inventor 王子飞李杰贾月涵徐彬沈健
Owner QILU UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap