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

Electron injection layer material and organic electroluminescent device

A technology for electroluminescent devices and electron injection layers, which is applied in the direction of organic semiconductor devices, electric solid devices, electrical components, etc., can solve the problems of affecting electron injection capabilities, active chemical properties, and difficult storage, so as to improve luminous performance and reduce Electron injection barrier, effect of improving balance

Pending Publication Date: 2021-12-31
CHANGCHUN HYPERIONS TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal materials, the lower the work function, the higher the current density and the higher the electron injection ability at the same voltage, but its chemical properties are lively, it is not easy to store under normal temperature and pressure, and it is easily affected by water vapor and oxygen in the air. Therefore, it is urgent to develop new electron injection materials and improve the electron injection ability

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
  • Electron injection layer material and organic electroluminescent device
  • Electron injection layer material and organic electroluminescent device
  • Electron injection layer material and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The preparation of the organic electroluminescent device of the present invention adopts a vacuum evaporation system, and the preparation is completed by continuous evaporation under the condition of uninterrupted vacuum. The materials used are in different evaporation source quartz crucibles, and the temperature of the evaporation source can be controlled separately.

[0039] The anode of the organic electroluminescent device of the present invention can use a material with a large work function, for example: metals such as vanadium, chromium, copper, zinc, gold or alloys thereof; metal oxides such as zinc oxide, indium oxide, indium oxide Tin (indium tin oxide, ITO) and indium zinc oxide (indium zinc oxide, IZO); combinations of metals and oxides, such as ZnO:Al or SnO 2 : Sb; conductive polymers, such as poly(3-methyl compound), poly[3,4-(ethylene-1,2-dioxy) compound] (PEDOT), polypyrrole and polyaniline, etc., but not limited to this.

[0040] The negative electro...

Embodiment 1

[0084] Clean the ITO glass substrate twice in distilled water, ultrasonically wash for 30 minutes, after distilled water cleaning, isopropanol, acetone, methanol and other solvents are sequentially ultrasonically washed and then dried, transferred to a plasma cleaner, and the above substrate is washed 5 minutes, sent to the evaporation machine. Evaporate hole injection layer HAT-CN / 15nm layer by layer, hole transport layer NPB / 120nm, light-emitting layer as the main body BH: doped with 10% BD / 20nm, hole blocking layer of the present invention compound 17 / 5nm, electron transport layer Alq 3 / 25nm, electron injection layer Li 2 CO 3 : Doped with 2% Yb / 2nm, cathode Al / 300nm.

[0085]

Embodiment 2

[0087] Clean the ITO glass substrate twice in distilled water, ultrasonically wash for 30 minutes, after distilled water cleaning, isopropanol, acetone, methanol and other solvents are sequentially ultrasonically washed and then dried, transferred to a plasma cleaner, and the above substrate is washed 5 minutes, sent to the evaporation machine. Evaporate hole injection layer HAT-CN / 15nm layer by layer, hole transport layer NPB / 120nm, light-emitting layer as the main body BH: doped with 10% BD / 20nm, hole blocking layer of the present invention compound 82 / 5nm, electron transport layer Alq 3 / 25nm, electron injection layer Li 2 CO 3 : Doped with 5% Yb / 2.5nm, cathode Al / 300nm.

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
Login to View More

Abstract

The invention provides an electron injection layer material and an organic electroluminescent device, and belongs to the technical field of organic electroluminescence. According to the invention, metal Yb is doped into a lithium-containing compound, so that the electron injection barrier can be reduced, the electron injection capability is remarkably improved, the concentration of electrons and holes in the device is further balanced by optimizing the doping concentration of the metal Yb, and the luminescence performance of the device is effectively improved. The invention also provides the organic electroluminescent device comprising the electron injection layer material, and at least one of a hole blocking layer and an electron transport layer adopts a specific structure shown in the formula I, so that the balance degree of electrons and holes can be further improved, and the organic electroluminescent device has relatively high light-emitting efficiency and relatively long service life.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence, and in particular relates to an electron injection layer material and an organic electroluminescence device. Background technique [0002] Organic Light-Emitting Diode (OLED) is an all-solid-state light-emitting device with high brightness, high contrast, high definition, wide viewing angle, wide color gamut, ultra-thin, ultra-light, low power consumption, wide Temperature, self-illumination, high luminous efficiency, short response time, transparency, flexibility, etc., have been commercialized in the fields of mobile phones, TVs, and micro-displays. Potential new display technology. [0003] The device structure used in OLEDs generally consists of an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode. By applying a voltage between the anode and the cathode, electrons are inje...

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): H01L51/54H01L51/50
CPCH10K85/622H10K85/624H10K85/615H10K85/6576H10K85/6574H10K85/657H10K85/6572H10K50/16H10K50/171H10K50/18H10K2102/00
Inventor 郭建华李梦茹苗玉鹤孙月
Owner CHANGCHUN HYPERIONS 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