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A kind of organosilicon functionalized red light carbon quantum dot and its preparation method and application

A technology of carbon quantum dots and organic silicon, applied in the field of luminescent materials, can solve the problems of low color rendering index and lack of LED devices, and achieve the effect of simple conditions, high luminous quantum efficiency, and meeting the needs of indoor lighting

Active Publication Date: 2017-10-10
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the lack of organosilane-functionalized red carbon dots, the color rendering index of LED devices based on silylated carbon dots is low

Method used

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  • A kind of organosilicon functionalized red light carbon quantum dot and its preparation method and application
  • A kind of organosilicon functionalized red light carbon quantum dot and its preparation method and application
  • A kind of organosilicon functionalized red light carbon quantum dot and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Organosilicon functionalized red light carbon quantum dots, the preparation method is as follows:

[0041] Add 0.1g p-phenylenediamine, 20ml ethanol, 10mL isocyanate propyltriethoxysilane, and 0.05g sodium hydroxide into the reaction kettle, seal it and react at 170°C for 6h; after the reaction is completed, pass column chromatography The red light carbon quantum dots functionalized with organosilicon were obtained through purification. The yield of the obtained red light carbon quantum dots was 10%.

[0042] figure 1 It shows the high-resolution transmission electron microscope and size distribution diagram of the prepared red light carbon quantum dots. It can be seen from the figure that the statistical average particle size of the red light carbon quantum dots is about 3.3nm, and the stripes of the graphite layer in the carbon quantum dots The pitch is 0.26nm.

[0043] figure 2 The absorption and fluorescence spectra of the prepared red light carbon quantum dots...

Embodiment 2

[0049] Organosilicon functionalized red light carbon quantum dots, the preparation method is as follows:

[0050] Add 0.1g p-phenylenediamine, 20ml isopropanol, 10mL isocyanate propyltriethoxysilane, and 0.05g potassium hydroxide into the reaction kettle, seal it and react at 170°C for 1 hour; after the reaction is completed, extract Organic silicon functionalized red light carbon quantum dots were obtained by purification. The yield of the obtained red-light carbon quantum dot is 8%. The red-light carbon quantum dot emits red light under the excitation of 360-560nm light, and the luminous quantum efficiency is 20%.

[0051] The prepared red-light carbon quantum dots were prepared according to the method in Example 1 to obtain red-light LED devices and white-light LED devices. The key indicators such as chromaticity coordinates and color rendering index are shown in Table 2.

Embodiment 3

[0053] Organosilicon functionalized red light carbon quantum dots, the preparation method is as follows:

[0054] Add 0.1g of p-phenylenediamine, 30ml of acetone, 10mL of isocyanate propyltriethoxysilane, and 0.05g of sodium carbonate into the reaction kettle, seal and react at 180°C for 12h; after the reaction is completed, purify by extraction to obtain organic Silicon-functionalized red-emitting carbon quantum dots. The yield of the obtained red light carbon quantum dot is 7%. The red light carbon quantum dot emits red light under the excitation of 360-560nm light, and the luminous quantum efficiency is 19%.

[0055] The prepared red-light carbon quantum dots were prepared according to the method in Example 1 to obtain red-light LED devices and white-light LED devices. The key indicators such as chromaticity coordinates and color rendering index are shown in Table 2.

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Abstract

The invention discloses a red-light carbon quantum dot functionalized with organic silicon. The carbon quantum dot is prepared by the following method: mixing aniline organic matter, organic silicon, an alkaline substance and a solvent at a temperature of 150-300°C Solvothermal reaction is carried out to obtain organosilicon-functionalized red-light carbon quantum dots; the red-light carbon quantum dots emit red light when excited by light with a wavelength of 360-560 nm. The preparation method of the red light carbon quantum dot in the present invention is simple, and the luminous quantum efficiency is high. The invention also discloses the application of the organosilicon functionalized red light carbon quantum dots in preparing red light LED devices or white light LED devices.

Description

technical field [0001] The invention relates to the field of luminescent materials. More specifically, it relates to an organosilicon-functionalized red light carbon quantum dot and its preparation and application. Background technique [0002] Luminescent materials play an important role in human production and life. Light-emitting diodes (LEDs) have found widespread use in solid-state lighting and displays. The currently widely used luminescence conversion materials are mainly rare earth-doped inorganic phosphors. Although this type of phosphor has high quantum efficiency and light conversion efficiency, there are still some fundamental defects, such as large consumption of rare earth strategic resources, high-temperature reaction preparation (higher than 1000 ° C), broad emission peak, long-wave tailing, The particle size is too large and difficult to control, the composition is difficult to control, and it is difficult to uniformly disperse and form a film, etc., whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54
CPCH10K85/00H10K50/115H10K50/00H10K50/80
Inventor 谢政王云凤周树云尹正茂王凯周传健陈萍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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