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Flexible electroluminescence composite material and preparation method thereof

A technology of composite materials and luminescent materials, applied in circuits, electrical components, electrical solid devices, etc., can solve the problems of short service life and instability, and achieve the effects of long service life, stable luminescence, and adjustable luminous color.

Inactive Publication Date: 2016-05-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of short service life and instability of luminescent materials on flexible materials, the present invention provides a flexible electroluminescence composite material, which can be bent, cut and folded arbitrarily, and the luminescent materials will not be damaged and have a long service life , stable light emission

Method used

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  • Flexible electroluminescence composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1.1 Measure n-hexane and acetone with a volume of 2mL respectively. After mixing evenly, add 5g polyvinylcarbazole under stirring conditions and make it completely dissolve;

[0034] 1.2 Weigh 0.1g of fullerene and add it to the solution obtained in Example 1.1. After mixing evenly, the dielectric layer is coated on the PET film with an ITO conductive layer on the surface by screen printing, and the thickness of the dielectric layer is controlled to be 10 micron, followed by drying;

[0035] 1.3 Add 50g of rare earth red rare earth luminescent material with a particle size of 100nm to the mixed solution of n-hexane and acetone with a volume of 10mL, and stir to make it evenly mixed;

[0036] 1.4 Weigh 49g of polyvinylcarbazole and 1g of graphene into the solution obtained in step 1.3 to obtain a mixed solution;

[0037] 1.5 Use screen printing to evenly coat the solution in Example 1.4 on the dielectric layer in Example 1.2, and control the thickness of the light-emitt...

Embodiment 2

[0040] 2.1 Measure n-hexane and acetone with a volume of 2mL respectively. After mixing evenly, add 5g polyvinylcarbazole under stirring conditions and make it completely dissolve;

[0041] 2.2 Weigh 0.1g of fullerene and add it to the solution obtained in Example 2.1. After mixing evenly, the dielectric layer is coated on the PET film with an ITO conductive layer on the surface by screen printing, and the thickness of the dielectric layer is controlled to be 10 micron, followed by drying;

[0042] 2.3 Add 50g of white rare earth luminescent material with a particle size of 1500nm to the mixed solution of n-hexane and acetone with a volume of 10mL respectively, and stir to make it evenly mixed;

[0043] 2.4 Weigh 25g of polyvinyl carbazole and 1 gram of graphene into the solution obtained in Example 2.3 to obtain a mixed solution;

[0044] 2.5 The solution in Example 2.4 was uniformly coated on the dielectric layer in Example 2.2 by screen printing, and the thickness of the l...

Embodiment 3

[0047] 3.1 Measure n-hexane and acetone with a volume of 2mL respectively. After mixing evenly, add 5g polyvinylcarbazole under stirring conditions and make it completely dissolve;

[0048] 3.2 Weigh 0.1g of fullerene and add it to the solution obtained in Example 3.1. After mixing evenly, the dielectric layer is coated on the PET film with an ITO conductive layer on the surface by screen printing, and the thickness of the dielectric layer is controlled to be 10 micron, followed by drying;

[0049] 3.3 Add 31g of red rare earth luminescent material with a particle size of 1200nm to the mixed solution of n-hexane and acetone with a volume of 10mL, and stir to make it evenly mixed;

[0050] 3.4 Weigh 30 g of polyvinylcarbazole and 1 gram of graphene into the solution obtained in Example 3.3 to obtain a mixed solution;

[0051] 3.5 Laser printing was used to evenly coat the solution in Example 3.4 on the dielectric layer in Example 3.2, and control the thickness of the luminescent...

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Abstract

The invention discloses a flexible electroluminescence composite material and a preparation method thereof. The composite material comprises a flexible matrix coated with a conducting layer, wherein the conducting layer is coated with a dielectric layer, and the dielectric layer is coated with a luminous layer, wherein the luminous layer is made of a mixture of a luminous material, graphene and polyvinyl carbazole. The flexible electroluminescence composite material is simple in preparation; the polyvinyl carbazole and the graphene are introduced in the luminous layer, so that the luminous layer cannot be damaged when coated on the flexible matrix; various commercial inorganic luminous materials are directly used as the luminous material and can be excited by utilizing alternating-current current to give out light, so that the flexible electroluminescence composite material is energy-saving, long in service life, stable in luminescence, bendable, foldable, capable of being cut, and good in flexibility. The composite material can be made into various device materials, can be used as a lighting source, and is adjustable in luminous color, wide in luminous material application range, good in application prospect and particularly suitable for the requirement of the environment development at present.

Description

technical field [0001] The invention relates to a flexible electroluminescent composite material and a preparation method thereof, belonging to the technical field of energy materials. Background technique [0002] When a substance absorbs energy in a certain way, electrons are excited from the ground state to the excited state, and then the phenomenon of emitting photons in the process of returning from the excited state to the ground state is called luminescence. According to different excitation sources, there are various types of luminescence, the main types are: photoluminescence, cathodoluminescence, electroluminescence, thermoluminescence, photoluminescence, radioluminescence and so on. Electroluminescence refers to a phenomenon in which a voltage is applied to both ends of the luminescent material, and photons are released during the transition of electrons from the ground state to the excited state and then back to the ground state under electrical excitation. At pr...

Claims

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Application Information

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IPC IPC(8): H01L51/54H01L51/50H01L51/56
CPCH10K85/00H10K30/865H10K50/11H10K71/00
Inventor 杨萍陈玲车全德
Owner UNIV OF JINAN
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