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Flexible organic electroluminescent device and preparation method thereof

An electroluminescent device, an organic technology, applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve problems such as limited conductivity, high surface resistance, and affecting the luminous efficiency of flexible organic electroluminescent devices. Achieve low raw material cost, increase electrical conductivity, and improve electrical conductivity

Inactive Publication Date: 2014-03-26
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the immature research on PEDOT / PSS composite materials and their limited conductivity, the anode made of this material also has the problem of high surface resistance, which seriously affects the luminous efficiency of flexible organic electroluminescent devices.

Method used

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  • Flexible organic electroluminescent device and preparation method thereof
  • Flexible organic electroluminescent device and preparation method thereof
  • Flexible organic electroluminescent device and preparation method thereof

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preparation example Construction

[0071] The present invention also provides a method for preparing a flexible organic electroluminescent device, comprising the following steps:

[0072] (1) After cleaning the flexible substrate, air-dry it and set it aside;

[0073] (2) Add the suspension of single-layer graphite to the aqueous solution of poly-3,4-dioxyethylene thiophene and polybenzenesulfonate mixture, and stir to obtain graphene, poly-3,4-dioxyethylene thiophene and polyphenylene sulfonate The mixed solution of sulfonate, and then add polar aprotic solvent, stir evenly to obtain an anode solution system; wherein, the mass ratio of graphene, poly(3,4-dioxyethylenethiophene) and polybenzenesulfonate is 0.003-0.158 :2:1;

[0074] (3) Spin-coat the anode solution system obtained in step (2) on the surface of the flexible substrate treated in step (1), then place the flexible substrate at 130-160°C for 5-15 minutes, and cool And remove the excess solvent to obtain a flexible anode;

[0075] (4) On the flexi...

Embodiment 1

[0094] A method for preparing a flexible organic electroluminescent device, comprising the following steps:

[0095] (1) Select polyethylene naphthalate (PEN) film as a flexible substrate, put it in deionized water containing detergent for ultrasonic cleaning, clean it with deionized water, put it in isopropanol, In acetone and carry out ultrasonic treatment, then dry with nitrogen, standby;

[0096] (2) Add the suspension of single-layer graphite with a concentration of 0.05mg / mL to the PEDOT / PSS aqueous solution with a mass fraction of 1.0%, and stir to obtain a graphene-PEDOT / PSS mixture, and then press the volume ratio of 20:1 Add the concentration of 98% dimethyl sulfoxide solution to the graphene-PEDOT / PSS mixed solution, and after mixing, ultrasonic treatment at room temperature for 10 minutes to obtain a uniform anode solution system; wherein, graphene, poly 3, The mass ratio of 4-dioxyethylenethiophene to polybenzenesulfonate is 0.006:2:1;

[0097] (3) Put the flexi...

Embodiment 2

[0107] A method for preparing a flexible organic electroluminescent device, comprising the following steps:

[0108] (1) Select polyethylene terephthalate (PET) film as the flexible substrate, soak it in isopropanol for 15 minutes, take it out, soak it in acetone for 15 minutes, and then wash it with distilled water Clean and dry at room temperature for later use;

[0109] (2) Add 2.0 mg / mL single-layer graphite suspension to 5% PEDOT / PSS aqueous solution, stir to obtain graphene-PEDOT / PSS mixture, and then press the ratio of 10:1 by volume In graphene-PEDOT / PSS mixed solution, adding concentration is the dimethyl sulfoxide (DMSO) solution of 80%, after mixing, at room temperature supersonic treatment 15 minutes, obtains uniform anode solution system; Wherein, graphene, poly 3 , The mass ratio of 4-dioxyethylenethiophene to polybenzenesulfonate is 0.158:2:1;

[0110] (3) Put the flexible substrate treated in the step (1) on the homogenizer, spin-coat the anode solution syste...

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Abstract

The invention discloses a flexible organic electroluminescent device. The flexible organic electroluminescent device comprises a flexible substrate, an anode layer, a hole transporting layer, a light emitting layer, an electronic transmitting layer, an electronic injection layer and a cathode layer which are sequentially overlapped, wherein the anode layer is made of materials comprising graphene, poly 3,4-ethylenedioxythiophene and polystyrene sulfonate at the mass ratio of (0.003-0.158):2:1. The invention also discloses a preparation method for the flexible organic electroluminescent device. According to the invention, the technical defect that a current flexible organic electroluminescent device taking high-molecular PEDOT / PSS as the anode materials is low in light efficiency is overcome; by doping the graphene in appropriate ratio in the anode material, the conductibility of the anode material is increased, the surface resistance of the anode material is reduced, and accordingly, the light efficiency of the flexible organic electroluminescent device is improved. The preparation method is simple in process, low in raw material cost, and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the related field of electronic devices, in particular to a flexible organic electroluminescent device and a preparation method thereof. Background technique [0002] Flexible organic electroluminescent device (FOLED) is a new type of organic electroluminescent device with a flexible substrate as the substrate. It has the advantages of low driving voltage, high luminous efficiency, wide viewing angle, fast response, and rollable folding. fields have broad application prospects. [0003] The basic structure of a flexible organic electroluminescent device is: flexible substrate / anode layer / hole injection layer / hole buffer layer / light emitting layer / electron transport layer / electron injection layer / cathode layer. The anode layer plays a crucial role in flexible organic electroluminescent devices as a base for other layers. Usually, when preparing the anode, a layer of transparent conductive film such as ITO, IZO and other materi...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/56
CPCH10K50/81H10K71/00
Inventor 周明杰王平冯小明陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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