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Electroluminescent device, display device and lighting device

A technology of electroluminescent devices and light-emitting layers, which is applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of low luminous efficiency and short life, and achieve improved luminous efficiency, increased service life, and increased charge injection efficiency Effect

Active Publication Date: 2019-05-03
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an electroluminescent device to solve the problems of low luminous efficiency and short life

Method used

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  • Electroluminescent device, display device and lighting device
  • Electroluminescent device, display device and lighting device
  • Electroluminescent device, display device and lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] It is the same as Comparative Example 1, except that the constituent material of the light-emitting layer includes carbon nanotubes with surface hydrophobic modification.

[0053]The constituent materials of the luminescent layer include surface hydrophobically modified carbon nanotubes, the surface of the hydrophobically modified carbon nanotubes is modified with octadecyl groups, the mass ratio of carbon nanotubes and quantum dots is 0.2%, and the carbon nanotubes are single-walled Carbon nanotubes have an outer diameter of 1 nanometer to 2 nanometers and a length of 0.5 micrometers to 2 micrometers.

[0054] The surface hydrophobic modification process of carbon nanotubes is as follows, get 20 milliliters of carboxylated carbon nanotubes in a 50 milliliter three-necked flask, fill 20 milliliters of thionyl chloride, 0.5 milliliters of N,N-dimethyl Formamide was refluxed at 70 degrees Celsius for 24 hours, and then 5 ml of oleylamine was added thereto, and reacted at ...

Embodiment 2

[0056] It is the same as Comparative Example 1, except that the constituent material of the light-emitting layer includes carbon nanotubes with surface hydrophobic modification.

[0057] The constituent material of the luminescent layer contains carbon nanotubes with surface hydrophobic modification, the surface of the hydrophobically modified carbon nanotubes is modified with hexadecyl, the mass ratio of carbon nanotubes and quantum dots is 0.2%, and the carbon nanotubes are single-walled Carbon nanotubes have an outer diameter of 1 nanometer to 2 nanometers and a length of 0.5 micrometers to 2 micrometers.

[0058] The surface hydrophobic modification process of carbon nanotubes is as follows, get 20 milliliters of carboxylated carbon nanotubes in a 50 milliliter three-necked flask, fill 20 milliliters of thionyl chloride, 0.5 milliliters of N,N-dimethyl Formamide was refluxed at 70 degrees Celsius for 24 hours, and 5 ml of hexadecylamine was added thereto, and reacted at 70...

Embodiment 3

[0060] Same as Example 1, except that the mass ratio of carbon nanotubes and quantum dots is 0.4%.

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Abstract

The invention provides an electroluminescence device, comprising an anode, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode arranged in sequence, the light-emitting layer comprising surface-modified carbon nanotubes and uniformly dispersed in the carbon Quantum dots surrounding nanotubes, the length of the carbon nanotubes being at least half the thickness of the light-emitting layer. The invention can effectively improve the luminous efficiency of the electroluminescent device and further increase its service life. The invention also provides a display device and a lighting device.

Description

technical field [0001] The present invention relates to the field of light emitting devices, in particular to an electroluminescence device, a display device and an illumination device. Background technique [0002] Quantum dots are inorganic semiconductor light-emitting nanocrystals with three-dimensional dimensions in the range of 1-20 nanometers. Because its particle size is smaller than or close to the exciton Bohr radius, quantum dots have the advantages of wide excitation wavelength range, controllable particle size, narrow half-maximum width, large Stokes shift, and strong photostability, so they are widely used. In display, biomarker, solar cell and other fields. [0003] Quantum dot technology has been applied in the field of display. Quantum dot electroluminescent devices have important commercial application value. They have the advantages of narrow half-peak width, high stability, long service life, wide range of luminous wavelengths, and high efficiency of quan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54
CPCH10K85/221H10K50/115
Inventor 刘东强王红琴王思元王允军
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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