The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2014
Filed:
Nov. 24, 2005
Applicants:
Salvatore Cina, Rennes, FR;
Benoit Racine, Renage, FR;
Christophe Fery, Niedereschach, DE;
Inventors:
Assignee:
Thomson Licensing, Boulogne-Billancourt, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/54 (2006.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5012 (2013.01); H01L 2251/5315 (2013.01); H01L 51/5032 (2013.01); H01L 51/5052 (2013.01); Y10S 428/917 (2013.01);
Abstract
Organic light-emitting diode comprising a lower electrode and an upper electrode, an organic electroluminescent layer and at least one doped organic layer in contact with one of said electrodes. According to the invention, the doping level of this organic layer is higher at the interface with the electrode than in the core of this layer. Thanks to the invention, the luminous efficiency of the diode is very substantially improved.