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Organic light-emitting device and preparation method thereof

An electroluminescent device and electroluminescent technology, which are applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., and can solve the problems of high driving voltage, low carrier mobility, poor stability, etc.

Inactive Publication Date: 2015-05-20
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

[0003] Although organic electroluminescent devices have many advantages, compared with inorganic electroluminescent devices, organic electroluminescent devices have higher driving voltage and poor stability, and the carrier mobility of the organic layer in the device is low. Voltage, improving carrier injection efficiency and carrier mobility are very important to improve the power conversion efficiency and lifetime of organic electroluminescent devices. In order to solve these problems, organic electroluminescent devices use p-type doped space hole injection layer, but the hole injection efficiency of organic electroluminescent devices needs to be further improved

Method used

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  • Organic light-emitting device and preparation method thereof
  • Organic light-emitting device and preparation method thereof

Examples

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Embodiment 1

[0037] A method for preparing an organic electroluminescent device, comprising the following steps:

[0038] (1) Conductive anode 1 is made of indium tin oxide glass (ITO), and ultrasonicated with detergent, deionized water, acetone and ethanol for 5 minutes each to remove organic pollutants on the glass surface, cleaned and air-dried; The final ITO glass also needs surface activation treatment to increase the oxygen content on the ITO surface and improve the work function on the ITO surface; the thickness of the conductive anode 1 is 100nm;

[0039] (2) Then, the first doped layer 21, the second doped layer 22, the third doped layer 23, the fourth doped layer 24 and the fifth doped layer 25 are prepared by vacuum evaporation on the conductive anode 1 in sequence to obtain The hole injection layer 2 with a thickness of 30nm, the materials of the first doped layer 21, the second doped layer 22, the third doped layer 23, the fourth doped layer 24 and the fifth doped layer 25 are...

Embodiment 2

[0048] A method for preparing an organic electroluminescent device, comprising the following steps:

[0049] (1) Use indium tin oxide glass (ITO) as the conductive anode, and use detergent, deionized water, acetone and ethanol to ultrasonicate for 5 minutes each to remove organic pollutants on the glass surface, clean it and air dry it; The ITO glass also needs surface activation treatment to increase the oxygen content on the ITO surface and improve the work function of the ITO surface; the thickness of the conductive anode is 100nm;

[0050] (2) Then prepare the first doped layer, the second doped layer, the third doped layer, the fourth doped layer and the fifth doped layer by vacuum evaporation on the conductive anode to obtain holes with a thickness of 25nm The injection layer, the material of the first doped layer, the second doped layer, the third doped layer, the fourth doped layer and the fifth doped layer are all WO 3 Doped to the mixed material formed by TCTA, the ...

Embodiment 3

[0059] A method for preparing an organic electroluminescent device, comprising the following steps:

[0060] (1) Use indium tin oxide glass (ITO) as the conductive anode, and use detergent, deionized water, acetone and ethanol to ultrasonicate for 5 minutes each to remove organic pollutants on the glass surface, clean it and air dry it; The ITO glass also needs surface activation treatment to increase the oxygen content on the ITO surface and improve the work function of the ITO surface; the thickness of the conductive anode is 100nm;

[0061] (2) Then prepare the first doped layer, the second doped layer, the third doped layer, the fourth doped layer and the fifth doped layer by vacuum evaporation on the conductive anode to obtain holes with a thickness of 25nm Injection layer, the material of the first doped layer, the second doped layer, the third doped layer, the fourth doped layer and the fifth doped layer is V 2 o 5 The mixed material formed by doping to CBP has the sa...

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Abstract

The invention discloses an organic light-emitting device. The organic light-emitting device comprises a conductive anode, a hole injection layer, a hole transmission layer, a light emitting layer, an electron transmission layer, an electron injection layer and a cathode layer in sequentially overlapped arrangement. The hole injection layer comprises a first doped layer, a second doped layer, a third doped layer, a fourth doped layer and a fifth doped layer, and the first doped layer, the second doped layer, the third doped layer, the fourth doped layer and the fifth doped layer are overlapped sequentially and all made of mixed materials formed by doping doped materials into base materials. The invention further provides a preparation method of the organic light-emitting device.

Description

technical field [0001] The invention relates to the field of organic electroluminescence, in particular to an organic electroluminescence device and a preparation method thereof. Background technique [0002] Organic light-emitting devices (Organic light-emitting devices, referred to as OLEDs) is a multi-layer light-emitting device using organic light-emitting materials, including sequentially stacked anode layer, light-emitting layer and cathode layer. The principle of OLED light emission is based on the action of an external electric field, electrons are injected from the cathode layer to the lowest unoccupied molecular orbital (LUMO) of organic matter, and holes are injected from the anode to the highest occupied orbital (HOMO) of organic matter, electrons and holes The excitons meet, recombine, and form excitons in the light-emitting layer. The excitons migrate under the action of the electric field and transfer energy to the light-emitting material. The excited electron...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 周明杰钟铁涛王平张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD