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

Organic electroluminescence device

An electroluminescent device, an organic technology, applied in the direction of electric solid-state devices, electrical components, organic chemistry, etc., can solve the problems of easy crystallization, low blue light efficiency, poor stability, unstable film shape, etc., and achieve excellent luminous color and high efficiency Effect

Inactive Publication Date: 2009-09-23
TSINGHUA UNIV +2
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film morphology of the main material ADN is quite unstable and easy to crystallize, and the light color of ADN itself is also greenish (0.20, 0.26)
Therefore, a derivative blue light material based on ADN improvement appeared later, but it still cannot change the current situation of low efficiency and poor stability of blue light, and it is difficult to match red and green to obtain the color screen required today.

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 electroluminescence device
  • Organic electroluminescence device
  • Organic electroluminescence device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Embodiment 1: ITO / compound 1 (50nm) / LiF / Al

[0076] With the ITO conductive glass substrate etched with specific patterns as the substrate, the substrate is ultrasonically cleaned in deionized water containing cleaning solution. The temperature of the cleaning solution is about 60°C, and then the cleaned substrate is cleaned Drying, first put it into the pretreatment chamber for plasma pretreatment on the ITO substrate, and then put it into the evaporation chamber to evaporate the organic layer and the cathode structure in sequence. During the evaporation process, the pressure of the chamber is lower than 5.0×10 -3 Pa.

[0077] In this embodiment, the organic layer is vapor-deposited with a light-emitting layer with a thickness of 90 nm, and the material is Compound 1.

[0078] Evaporate 0.5nm lithium fluoride LiF as the electron injection layer, and finally cover 150nm metal aluminum Al as the cathode.

Embodiment 2

[0079] Embodiment 2: ITO / compound 2 (90nm) / LiF / Al

[0080] Prepare with embodiment 1. The light-emitting layer was changed to 90nm compound 2.

Embodiment 3

[0081] Embodiment 3: ITO / compound 3 (150nm) / LiF / Al

[0082] Prepare with embodiment 1. The emitting layer was changed to 150nm compound 3.

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 relates to an organic electroluminescence device with the new structure, which comprises a first electrode, a second electrode, an organic layer positioned between the two electrodes and comprising a luminous layer. The device is characterized in that the luminous layer at least comprises a benzanthracene derivative selected from the general expression such as right; wherein X and Y are separately selected from cyclization aromatic groups of four to twenty atomic carbon atoms or replaced cyclization aromatic groups of four to twenty atomic carbon atoms; A1, A2, A3 and A4 are separately selected from hydrogen atoms, ethylene, aromatic amino, carbazyl or aromatic heterocyclic radical and are selected from the hydrogen atoms at different times. The device uses the benzanthracene derivative as luminescent dye, thus being capable of obtaining devices with high brightness, high efficiency and excellent emitting colors.

Description

Technical field: [0001] The invention relates to an organic electroluminescent device (OLED), in particular to an electroluminescent device using a specific light-emitting host material. Background technique: [0002] Organic electroluminescent displays have a series of advantages such as self-illumination, low-voltage DC drive, full curing, wide viewing angle, light weight, simple composition and process, etc. Compared with liquid crystal displays, organic electroluminescent displays do not need a backlight source Large, low power, and its response speed can reach 1000 times that of liquid crystal displays, but its manufacturing cost is lower than that of liquid crystal displays with the same resolution. Therefore, organic electroluminescent displays have broad application prospects. [0003] The general structure of an organic electroluminescent device includes in turn: a substrate, an anode, an organic layer, and a cathode, and the organic functional layer includes an emi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54C07C211/50C07C211/55C07C211/57C07C211/54
Inventor 邱勇段炼谢静任雪艳
Owner TSINGHUA UNIV
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