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Ultra-thin flexible electroluminescent sheet and preparation method thereof

A technology of electroluminescent layer and flexible electricity, which is applied in the field of ultra-thin flexible electroluminescent sheet and its preparation, and can solve the problem of cracking of the luminous uniformity of the electroluminescent sheet, brittle ceramic conductive layer, failure of the brittle ceramic conductive layer, etc. problem, to achieve the effect of light and thin thickness, reduce the overall thickness, and good anti-oxidation ability

Inactive Publication Date: 2019-09-20
湖南纳昇电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, the traditional transparent conductive layer is composed of a transparent substrate and a brittle ceramic conductive layer. After repeated bending, or when the bending curvature is too large, the brittle ceramic conductive layer is easily broken, so that the transparent conductive layer The sheet resistance rises sharply, and eventually affects the luminous uniformity of the electroluminescent sheet; especially when applied to ultra-thin flexible substrates, the brittle ceramic conductive layer is very easy to fail due to bending

Method used

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  • Ultra-thin flexible electroluminescent sheet and preparation method thereof

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Embodiment 1

[0039] A kind of ultra-thin flexible electroluminescent sheet of the present invention, the structure of this ultra-thin flexible electroluminescent sheet is as follows figure 1 As shown, it consists of a flexible transparent electrode 1, an electroluminescent layer 2 formed by mixing nano-barium powder and water-based anionic UV glue, an insulating layer 3 prepared by water-based anionic UV glue, and a flexible transparent electrode 1. The flexible transparent electrode 1 consists of a transparent substrate 11 and a transparent conductive layer 12 from outside to inside. The transparent substrate is polyethylene terephthalate (PET), and the thickness of the transparent substrate is 15 μm; the transparent conductive layer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid ) (PEDOT:PSS) film, the thickness of the transparent conductive layer is 10nm, the sheet resistance of the transparent conductive layer is 300Ω / □, and the light transmittance is 95%; the quality of...

Embodiment 2

[0048] A kind of ultra-thin flexible electroluminescent sheet of the present invention, the structure of this ultra-thin flexible electroluminescent sheet is as follows figure 1 As shown, it consists of a flexible transparent electrode 1, an electroluminescent layer 2 formed by mixing nano-barium powder and water-based anionic UV glue, an insulating layer 3 prepared by water-based anionic UV glue, and a flexible transparent electrode 1. The flexible transparent electrode 1 consists of a transparent substrate 11 and a transparent conductive layer 12 from outside to inside. Wherein the transparent base material is polyimide (PI), and the thickness of the transparent base material is 50 μm; The ratio is 80%; the mass ratio of nano-barium powder to water-based anionic UV glue in the electroluminescence layer is 1:2.5.

[0049] The preparation method of the ultra-thin flexible electroluminescent sheet mainly includes the following steps:

[0050] (1) After cleaning the transparen...

Embodiment 3

[0057] A kind of ultra-thin flexible electroluminescent sheet of the present invention, the structure of this ultra-thin flexible electroluminescent sheet is as follows figure 1 As shown, it consists of a flexible transparent electrode 1, an electroluminescent layer 2 formed by mixing nano-barium powder and water-based anionic UV glue, an insulating layer 3 prepared by water-based anionic UV glue, and a flexible transparent electrode 1. The flexible transparent electrode 1 consists of a transparent substrate 11 and a transparent conductive layer 12 from outside to inside. The transparent substrate is polyethylene naphthalate (PEN), and the thickness of the transparent substrate is 50 μm; the transparent conductive layer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) (PEDOT:PSS) and silver nanowires are a mixture film with a mass ratio of 1:5, the thickness of the transparent conductive layer is 50nm, the sheet resistance of the transparent conductive layer is 1...

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Abstract

The invention discloses an ultra-thin flexible electroluminescent sheet, which comprises a flexible transparent electrode, an electroluminescent layer, an insulating layer and a flexible transparent electrode in turn, wherein the flexible transparent electrode is composed of a transparent substrate and a transparent conductive layer; the transparent conductive layer is a film of either poly(3, 4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) or silver nanowires or a hybrid film of the two materials; and the thickness of the transparent conductive layer is 10nm-200nm. The novel transparent conductive material with better bending resistance is adopted for replacement, so that the transparent electroluminescent device is thinner in overall thickness and better in flexibility, the performance in all aspects is excellent and stable, and the adhesion is good, thereby greatly expanding the application scope of the electroluminescent sheet, and having important significance for promoting the industrial application of the electroluminescent sheet. The invention further discloses a preparation method of the ultra-thin flexible electroluminescent sheet, which is simple in process, low in cost and convenient for industrial production.

Description

technical field [0001] The invention relates to the technical field of optoelectronic devices, in particular to an ultra-thin flexible electroluminescence sheet and a preparation method thereof. Background technique [0002] Electroluminescent sheets work on the principle of electroluminescence. Electroluminescent film is a light-emitting device, referred to as cold light film, EL lamp, EL light-emitting film or EL cold light film, which is composed of a back electrode layer, an insulating layer, a light-emitting layer, a transparent electrode layer and a surface protective film. The characteristic of generating light under the action of an electric field, converting electrical energy into light energy. With the emergence of lightweight and flexible application scenarios, the demand for thinner and more flexible electroluminescent sheets is increasing, and the most important technical limiting factor is the thickness of flexible transparent electrodes. Commonly used flexib...

Claims

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Application Information

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IPC IPC(8): H05B33/26H05B33/10
CPCH05B33/10H05B33/26
Inventor 童思超付迎刘仲军曹雷李洪学
Owner 湖南纳昇电子科技有限公司
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