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

Organic luminescence device

a luminescence device and organic technology, applied in the direction of discharge tube luminescence screen, other domestic articles, natural mineral layered products, etc., can solve the problems of insufficient durability of the luminescence device, liable to be deteriorated, liable to be changed in the properties of the device,

Inactive Publication Date: 2002-04-25
CANON KK
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] A more specific object of the present invention is to provide an organic (electro-) luminescence device capable of effecting light output (emission) at high efficiency and luminance while realizing a prolonged life.
[0012] A further object of the present invention is to provide an organic luminescence device which can be produced easily and relatively inexpensively.

Problems solved by technology

These organic luminescence devices are also still insufficient in terms of durability such that the devices are liable to be changed in their properties with time when used for a long period or liable to be deteriorated by the influence of ambient air containing oxygen or of humidity.
However, a satisfactory solution to the problem has not been realized yet, and particularly a red luminescence with a good color purity has not been satisfactorily provided.
A proposal of using a spiro compound in an organic luminescence device has been reported (JP-A 7-278537) but has failed to provide an electron-transporting layer or a luminescence layer exhibiting sufficient luminescence performance.

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 luminescence device
  • Organic luminescence device
  • Organic luminescence device

Examples

Experimental program
Comparison scheme
Effect test

examples 2-20

[0072] Organic luminescence devices were prepared and evaluated in the same manner as in Example 1 except for replacing the spiro compound of Compound No. I-4 with Compounds Nos. I-6, I-7, I-10, I-13, I-21, I-25, II-1, II-5, II-7, II-10, II-12, II-15, II-23, II-28, II-33, III-4, III-7, III-9 and III-11, respectively, listed in Tables 1 to 3 set forth above.

[0073] The results are inclusively shown in Table 4 set forth hereinafter.

example 21

[0075] The procedure of Example 1 was repeated up to the formation of the hole-transporting layer 5.

[0076] Then, the hole-transporting layer 5 was further coated by vacuum deposition of a mixture of spiro compound (Compound No. I-1) and aluminum tris(quinolinol) in a weight ratio of 1:20 to form a 60 nm-thick electron-transporting layer 6 under a vacuum of 1.0.times.10.sup.-4 Pa and at a film thickness growth rate of 0.2-0.3 nm / sec.

[0077] Then, the electron-transporting layer was further coated by vacuum deposition of Al--Li alloy (Li 25 content: 1 atom. %) to form a 150 nm-thick metal film 4 under a vacuum of 1.0.times.10.sup.-4 Pa and at a film thickness growth rate of 1.0-1.2 nm / sec, thereby forming an organic luminescence device of a structure shown in FIG. 2.

[0078] The thus-obtained device was then supplied with a DC voltage of 8 volts between the ITO electrode 2 as an anode and the Al--Li alloy electrode as a cathods, whereby a current flowed at a density of 8.7 mA / cm.sup.2 an...

examples 22-32

[0079] Organic luminescence devices were prepared and evaluated in the same manner as in Example 21 except for replacing the spiro compound of Compound No. I-1 with Compounds Nos. I-8, I-11, I-16, I-23, II-2, II-9, II-16, II-20, III-2, III-6 and III-7, respectively, listed in Tables 1 to 3 set forth above.

[0080] The results are inclusively shown in Table 5 set forth hereinafter.

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

An organic luminescence device is formed by disposing a layer of organic compound between a pair of an anode and a cathode. An organic luminescence device exhibiting orange to red luminescence at a good durability is provided by including an organic compound layer containing a spiro compound selected from a specific class, e.g., one represented by the following structural formula: wherein Rx represents

Description

FIELD OF THE INVENTION AND RELATED ART[0001] The present invention relates to an organic (electro-)luminescence device and particularly to an organic luminescence device for emitting light by applying an electric field to a film of an organic compound (organic compound layer).[0002] An organic luminescence device generally comprises a pair of electrodes (comprising an anode and a cathode) and a film comprising a fluorescent organic compound disposed between the electrodes. Into the organic compound layer (film), holes and electrons are injected from the anode and the cathode, respectively, thus forming excitons of the fluorescent organic compound. When the excitons are returned to ground state, the organic luminescence device emits light or causes luminescence.[0003] According to a study by Eastman Kodak Co. ("Appl. Phys. Lett.", vol. 51, pp. 913- (1987)), it has been reported that a function-separation type organic luminescence layer comprising mutually laminated two layers includi...

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(United States)
IPC IPC(8): C09K11/06H10K99/00
CPCC09K11/06Y10S428/917H01L51/0036H01L51/0038H01L51/0039H01L51/004H01L51/0042H01L51/0043H01L51/0052H01L51/0053H01L51/0054H01L51/0056H01L51/0058H01L51/0059H01L51/006H01L51/0065H01L51/0067H01L51/0068H01L51/007H01L51/0071H01L51/0077H01L51/0078H01L51/0079H01L51/0081H01L51/0085H01L51/0094H01L51/5012H01L2251/308H01L51/0035H10K85/113H10K85/111H10K85/115H10K85/146H10K85/141H10K85/114H10K85/151H10K85/621H10K85/615H10K85/622H10K85/624H10K85/631H10K85/626H10K85/633H10K85/653H10K85/654H10K85/655H10K85/6565H10K85/657H10K85/321H10K85/311H10K85/30H10K85/324H10K85/342H10K85/40H10K50/11H10K2102/103
Inventor SUZUKI, KOICHIHASHIMOTO, YUICHISENOO, AKIHIROUENO, KAZUNORI
Owner CANON KK
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