Maro Publications

Electroluminescence

Notes

Patent Abstracts

Patent Titles

*11/26/2013 
from 8/9/2013

Maro Encyclopedia

Electronics

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Notes

2. “The present invention relates to an organic electroluminescent (hereinafter abbreviated as "EL") device and to a fabrication method therefor.

In recent years, development has accelerated with regard to luminous elements that use organic substances as a self-luminous display device. This type of self-luminous display device may supplant conventional liquid crystal display devices. EL elements that use an organic substance as a luminous material can mainly be manufactured by forming a membrane using vapor deposition of an organic EL material (a luminous material) with low molecular weight, as disclosed beginning on page 913 of Appl. Phys. Lett. 51 (12), Sep. 21, 1987, and by coating an organic EL material with high molecular weight, as disclosed beginning on page 37 of Appl. Phys. Lett. 71 (1), Jul. 7, 1997.”

[Electroluminenescence, US Patent 8,454,403 (6/4/2013)]

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1. “Electroluminescence (EL) is an optical phenomenon and electrical phenomenon in which a material emits light in response to the passage of an electric current or to a strong electric field. This is distinct from black body light emission resulting from heat (incandescence), from a chemical reaction (chemiluminescence), sound (sonoluminescence), or other mechanical action (mechanoluminescence).

Electroluminescence is the result of radiative recombination of electrons and holes in a material, usually a semiconductor. The excited electrons release their energy as photons - light. Prior to recombination, electrons and holes may be separated either by doping the material to form a p-n junction (in semiconductor electroluminescent devices such as light-emitting diodes) or through excitation by impact of high-energy electrons accelerated by a strong electric field (as with the phosphors in electroluminescent displays).

The most typical inorganic thin-film EL (TFEL) is ZnS:Mn with yellow-orange emission. Examples of the range of EL material include:

 Powdered zinc sulfide doped with copper (producing greenish light) or silver (producing bright blue light)

 Thin-film zinc sulfide doped with manganese (producing orange-red color)

 Naturally blue diamond, which includes a trace of boron that acts as a dopant.

 Semiconductors containing Group III and Group V elements, such as indium phosphide (InP), gallium arsenide (GaAs), and gallium nitride (GaN).

 Certain organic semiconductors, such as [Ru(bpy)3]2+(PF6-)2, where bpy is 2,2'-bipyridine."

(Electroluminescence, Wikipedia, 8/9/2013)

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Patent Abstracts

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Patent Titles

11/12/2013

9. 8,581,241 
Polymer compound, net-like polymer compound produced by crosslinking the polymer compound, composition for organic electroluminescence element, organic electroluminescence element, organic EL display, and organic EL lighting 

8. 8,580,401 
Curable material and its application 

7. 8,580,395 
Electroluminescent polymers, method for the production thereof, and use thereof 

6. 8,580,393 
Polymer and organic electroluminescent device including the same 

10/15/2013

5. 8,557,333 
Electroluminescent display device 

4. 8,557,067 
Method for manufacturing organic electroluminescence panel 

6/4/2013

3. 8,455,115 
Organic electroluminescent device

2. 8,454,403 
Methods of manufacturing an organic electroluminescent device

4/23/2013

1. 8,426,038 
Phosphorescent polymer compound and organic electroluminescence device using the same 

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Interested!!
Bookmark this page to follow future developments!.
(RDC 7/16/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2013 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 8/9/2013.