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White electroluminescent device realized by carbon quantum dots

A technology of electroluminescent devices and carbon quantum dots, which is applied in the direction of electroluminescent light sources, electric light sources, electrical components, etc., can solve the problems of poor transparency of inorganic YAG fluorescent materials, reducing the color of electroluminescent devices, life-span luminous efficiency, high cost

Inactive Publication Date: 2013-10-02
SHANGHAI KERUN PHOSPHOR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Their disadvantages are that organic materials are stable and have poor weather resistance, and inorganic YAG fluorescent materials have poor transparency and high cost.
The existing technology reduces the color, lifespan and luminous efficiency of electroluminescent devices. Because dyes are not resistant to ultraviolet rays, white electroluminescent devices cannot be used outdoors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] Preparation of a white electroluminescence device realized by carbon quantum dots:

[0030] The back conductive layer is a metal back conductive layer, 0.1 mm thick aluminum foil, and its surface is brilliance and oil-removing substances.

[0031] The light-emitting layer is made of D502 blue-green electroluminescent material, which is mixed with epoxy resin paint, and the thickness of the screen-printed light-emitting layer is 50 microns; the curing temperature is 110 degrees.

[0032] The transparent conductive layer uses an ITO film with conductive properties, and is combined with the semi-dry light-emitting layer through a flat heat sealer.

[0033] The carbon quantum dot fluorescent layer is made by dispersing the carbon quantum dot fluorescent material with acetone, then mixing with epoxy resin, adding polystyrene microsphere diffusing agent, and screen printing on the surface of the ITO film with a thickness of about 0.1-0.3 mm.

[0034] The transparent sealing layer is se...

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Abstract

A white electroluminescent device realized by carbon quantum dots comprises a transparent sealing layer, a carbon quantum dot fluorescent layer, a transparent conductive layer, a light-emitting layer and a back conductive layer. The white electroluminescent device is characterized in that the carbon quantum dot fluorescent layer comprises carbon-containing nano fluorescent materials, has a light absorption range of 365-520 nm and a light emission range of 440-610 nm, and is used for converting the luminescent spectrums of the light-emitting layer into white light.

Description

technical field [0001] The invention belongs to the technical field of electroluminescent devices application. Background technique [0002] The existing electroluminescent (EL) device technology is currently divided into: EL glass screen, EL enamel screen, EL plastic screen, EL cloth, and EL wire device. Thin, light, dynamic flashing, uniform surface light, simple production and assembly process. Its luminous principle is that a DC or AC electric field acts on both sides of the luminescent material to generate high voltage and low current electric field luminescence, which is mainly used for advertising, lighting and display. And carbon quantum dot fluorescent material people directly make LED point light source semiconductor light-emitting device. [0003] The color of the existing EL light is mainly realized by the conversion of organic fluorescent dyes or pigments. Usually, it is printed with ink or mixed with plastic particles to make a film. After adding organic flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/00
Inventor 郑岩刘星元曲松楠
Owner SHANGHAI KERUN PHOSPHOR TECH
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