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Method for preparing organic electroluminescent device

An electroluminescent device, organic technology, applied in the direction of electric solid device, semiconductor/solid state device manufacturing, electrical components, etc., to achieve the effect of wide selection range, increase injection efficiency, and reduce contact barrier

Inactive Publication Date: 2010-06-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although OLED technology has made great progress in recent years, the current technology still has many bottlenecks in the field of organic electroluminescence.

Method used

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  • Method for preparing organic electroluminescent device
  • Method for preparing organic electroluminescent device
  • Method for preparing organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Such as figure 1 As shown, the organic functional layers in the device structure include a hole transport layer 2, a light emitting layer 3 and an electron transport layer 4, wherein the light emitting layer 3 is a blue light emitting layer or a green light emitting layer respectively.

[0066] The material of the hole transport layer of the device is NPB, and the material of the light emitting layer is BAlq or Alq 3 , the electron transport material is Alq 3 , The cathode layer is made of Mg:Ag alloy. The entire device structure is described as:

[0067] Glass substrate / ITO / {(3,4-polyethylenedioxythiophene / polystyrenesulfonic acid) / double octadecyl chain / (3,4-polyethylenedioxythiophene / polystyrenesulfonate acid)} n (n=4,8,12) / NPB(20nm) / BAlq(10nm) / Alq 3 (10nm) / Mg:Ag(100nm)

[0068] The preparation method is as follows:

[0069] (1) Utilize detergent, ethanol solution and deionized water to carry out ultrasonic cleaning to anode substrate, after cleaning, in 25% a...

Embodiment 2

[0080] Such as figure 1 As shown, the organic functional layers in the device structure include a hole transport layer 2, a light emitting layer 3 and an electron transport layer 4, wherein the light emitting layer 3 is a blue light emitting layer or a green light emitting layer respectively.

[0081] The material of the hole transport layer of the device is NPB, and the material of the light emitting layer is BAlq or Alq 3 , the electron transport material is Alq 3 , The cathode layer is made of Mg:Ag alloy. The entire device structure is described as:

[0082] Glass substrate / ITO / {(3,4-polyethylenedioxythiophene / polystyrenesulfonic acid) / double octadecyl ammonium bromide chain / (3,4-polyethylenedioxythiophene / polyethylene sulfonic acid) Styrene sulfonic acid)} n (n=4,8,12) / NPB(20nm) / BAlq(10nm) / Alq 3 (10nm) / Mg:Ag(100nm)

[0083] The manufacturing process of the device is the same as that of Embodiment 1

Embodiment 3

[0085] Such as figure 1 As shown, the organic functional layers in the device structure include a hole transport layer 2, a light emitting layer 3 and an electron transport layer 4, wherein the light emitting layer 3 is a blue light emitting layer or a green light emitting layer respectively.

[0086] The material of the hole transport layer of the device is NPB, and the material of the light emitting layer is BAlq or Alq 3 , the electron transport material is Alq 3 , The cathode layer is made of Mg:Ag alloy. The entire device structure is described as:

[0087] Glass substrate / ITO / {(polyaniline / polystyrene sulfonic acid) / double octadecyl chain / (polyaniline / polystyrene sulfonic acid)} n (n=4,8,12) / NPB(20nm) / BAlq(10nm) / Alq 3 (10nm) / Mg:Ag(100nm)

[0088] The manufacturing process of the device is the same as that of Embodiment 1

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Abstract

The invention discloses a method for preparing an organic electroluminescent device. The method comprises the following steps: firstly, a cationic surface active agent and a soluble ionogenic conductive polymer are assembled on the gas-liquid interface, then the laminar sequential nano structure of the conductive polymer / the surface active agent is transferred to an anode layer by the LB method tobe used as the hole injection layer of the device, and then the preparation of other functional layers and an electrode film of the device is performed. Because of very good sequential laminar structure, the hole injection layer material ensures that the contact potential barrier between a hole transport layer and the anode layer is reduced, and the hole injection efficiency is enhanced. The invention can be used for the preparation of big area polymer hole injection layers to produce organic electroluminescent devices with high qualities.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence in electronic components. Background technique [0002] In recent years, the conductive polymer poly-3,4-ethylenedioxythiophene (PEDOT) has gradually become a hot spot in the research of organic electronic materials due to its high electrical conductivity, thermal stability and good transparency. Doped PEDOT has high electrical conductivity and is a hole-rich material, so it can be used as a hole-transporting material for organic electronic devices. Subsequently, Bayer obtained a water-soluble 3,4-polyethylenedioxythiophene / polystyrenesulfonic acid (PEDOT:PSS) conductive polymer colloid with adjustable conductivity through the method of copolymerization, which has It has good environmental stability, good electron blocking properties and transparency, and has good affinity for ITO, making it an ideal material for the hole injection buffer layer of organic electroluminescent de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/56
Inventor 蒋亚东杨亚杰于军胜徐建华
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA