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Organic electroluminescent device and preparation method thereof

An electroluminescent device and electroluminescent technology, which are applied in the directions of organic light-emitting devices, organic semiconductor devices, materials of organic semiconductor devices, etc., can solve the problems of low luminous efficiency of light-emitting devices, low HOMO energy level, and unfavorable industrial production, etc. The effect of reducing the probability of luminescence quenching of the device, improving the luminous efficiency, and increasing the transmission rate

Inactive Publication Date: 2014-05-28
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

Usually, 2,9-dimethyl-4,7-biphenyl-1,10-phenanthroline (BCP) is used as the material of the hole blocking layer, but the HOMO energy level of BCP is not low enough, resulting in holes The blocking effect is not good, and the prepared organic electroluminescent device has disadvantages such as low luminous efficiency
Moreover, when BCP is used as the material of the hole blocking layer, the thickness of the hole blocking layer is relatively thin, which is difficult to control in the process and is not conducive to industrial production.

Method used

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  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A method for preparing an organic electroluminescent device, comprising the following steps:

[0075] (1) Conductive anode substrate pretreatment

[0076] Sonicate the ITO substrate with a thickness of 100nm for 15 minutes with detergent and deionized water in order to remove organic pollutants on the glass surface.

[0077] (2) Preparation of hole injection layer, hole transport layer, light emitting layer, hole blocking layer, electron transport layer, electron injection layer

[0078] Place the pretreated ITO substrate in a vacuum chamber (high vacuum coating system, Shenyang Scientific Instrument Development Center Co., Ltd.), and evacuate to 5×10 -3 Pa, MoO was deposited at a deposition rate of 1nm / s 3 Evaporated on the ITO substrate as a hole injection layer with a thickness of 30nm;

[0079] Evaporate TCTA on the hole injection layer as a hole transport layer at an evaporation rate of 1 nm / s, with a thickness of 40 nm;

[0080] 8-hydroxyquinoline aluminum (Al...

Embodiment 2

[0092] A method for preparing an organic electroluminescent device, comprising the following steps:

[0093] (1) Conductive anode substrate pretreatment

[0094] The AZO substrate with a thickness of 80nm was ultrasonicated for 15 minutes with detergent and deionized water in order to remove organic pollutants on the glass surface.

[0095] (2) Preparation of hole injection layer, hole transport layer, light emitting layer, hole blocking layer, electron transport layer, electron injection layer

[0096] Place the pretreated AZO substrate in a vacuum chamber (high vacuum coating system, Shenyang Scientific Instrument Development Center Co., Ltd.), and evacuate to 2×10 -4 Pa, WO was deposited at a deposition rate of 10nm / s 3 Evaporated on the AZO substrate as a hole injection layer with a thickness of 80nm;

[0097] N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (NPB) was deposited at a deposition rate of 0.1nm / s Evaporated on the hole injection layer as a hol...

Embodiment 3

[0109] A method for preparing an organic electroluminescent device, comprising the following steps:

[0110] (1) Conductive anode substrate pretreatment

[0111] The IZO substrate with a thickness of 300nm was ultrasonicated for 15 minutes with detergent and deionized water in sequence to remove organic pollutants on the glass surface.

[0112] (2) Preparation of hole injection layer, hole transport layer, light emitting layer, hole blocking layer, electron transport layer, electron injection layer

[0113] Place the pretreated IZO substrate in a vacuum chamber (high vacuum coating system, Shenyang Scientific Instrument Development Center Co., Ltd.), and evacuate to 2.5×10 -3 Pa, MoO was deposited at a deposition rate of 5nm / s 3 Evaporated on the IZO substrate as a hole injection layer with a thickness of 40nm;

[0114] Evaporate TAPC on the hole injection layer as a hole transport layer at an evaporation rate of 0.5nm / s, and its thickness is 45nm;

[0115] Evaporate BCzVB...

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Abstract

The invention provides an organic electroluminescent device and a preparation method thereof. The organic electroluminescent device comprises a conductive anode substrate, a hole injection layer, a hole transmission layer, a luminescent layer, a hole barrier layer, an electron transmission layer, an electron injection layer and a cathode layer which are laminated in turn. The material of the hole barrier layer is the mixed material formed in a way that bipolarity metal oxide is doped into organic silicon benzene material. The doped mass percentage of bipolarity metal oxide in organic silicon benzene material is 10-40%. The organic electroluminescent device is great in luminescence efficiency and luminescence performance, simple in method and process and low in cost.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and in particular relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device (OLED) is an energy conversion device that uses organic materials as light-emitting materials and can convert applied electrical energy into light energy. It has outstanding performances such as ultra-thin, self-luminous, fast response, low power consumption, etc., and has extremely broad application prospects in display, lighting and other fields. [0003] The structure of organic electroluminescent devices is a sandwich structure, with one or more organic thin films sandwiched between the cathode and the conductive anode. In a device with a multi-layer structure, the inside of the two poles mainly includes a light emitting layer, an injection layer and a transport layer. The organic electroluminescent device is a carr...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/54H01L51/56C09K11/06C23C14/24
CPCH10K85/60H10K50/18H10K2102/00H10K2102/301H10K71/00
Inventor 周明杰王平黄辉陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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