Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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 difficult process control, unfavorable industrial production, and low HOMO energy level.

Inactive Publication Date: 2014-05-28
OCEANS KING LIGHTING SCI&TECH CO LTD +2
View PDF0 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A method for preparing an organic electroluminescent device, comprising the following steps:

[0076] (1) Conductive anode substrate pretreatment

[0077] 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.

[0078] (2) Preparation of hole injection layer, hole transport layer, light emitting layer, hole blocking layer, electron transport layer, electron injection layer

[0079] 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, with the vapor deposition rate of 1nm / s 2 o 5 Evaporated on the ITO substrate as a hole injection layer with a thickness of 50nm;

[0080] Evaporate TAPC on the hole injection layer as a hole transport layer at an evaporation rate of 1 nm / s, with a thickness of 40 nm;

[0081] 8-hydroxyquinoline aluminum (Alq ...

Embodiment 2

[0090] A method for preparing an organic electroluminescent device, comprising the following steps:

[0091] (1) Conductive anode substrate pretreatment

[0092] 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.

[0093] (2) Preparation of hole injection layer, hole transport layer, light emitting layer, hole blocking layer, electron transport layer, electron injection layer

[0094] 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;

[0095] 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

[0104] A method for preparing an organic electroluminescent device, comprising the following steps:

[0105] (1) Conductive anode substrate pretreatment

[0106] 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.

[0107] (2) Preparation of hole injection layer, hole transport layer, light emitting layer, hole blocking layer, electron transport layer, electron injection layer

[0108] 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;

[0109] Evaporate TCTA on the hole injection layer as a hole transport layer at an evaporation rate of 0.5nm / s, and its thickness is 45nm;

[0110] Evaporate BCzVB...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

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 with calcium carbonate coated on the surface is doped into hole barrier material. The hole barrier material is 4, 7-dibenzyl-1, 10-phenanthroline, 1, 2, 4-triazole derivative or 1, 3, 5-tri (1-phenyl-1H-benzimidazole-2-radical) benzene. The mass percentage of bipolarity metal oxide in the hole barrier material is 5-40%. 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01L51/50H01L51/56
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com