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:
May. 19, 2015
Filed:
Sep. 16, 2004
Applicants:
Horst Vestweber, Gilserberg-Winterscheid, DE;
Anja Gerhard, Darmstadt, DE;
Philipp Stössel, Frankfurt, DE;
Inventors:
Horst Vestweber, Gilserberg-Winterscheid, DE;
Anja Gerhard, Darmstadt, DE;
Philipp Stössel, Frankfurt, DE;
Assignee:
Merck Patent GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/54 (2006.01); H01L 51/00 (2006.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
H01L 51/002 (2013.01); H01L 51/0052 (2013.01); H01L 51/5044 (2013.01); H01L 51/0058 (2013.01); H01L 51/0062 (2013.01); H01L 51/0085 (2013.01); H01L 51/5016 (2013.01); Y10S 428/917 (2013.01);
Abstract
The present invention relates to the improvement of organic electroluminescent devices which consist of a certain matrix material which has been doped with at least one phosphorescent emitter, and which are characterized in that the doping zone of the emitter in the matrix at right angles to the layer extends only over a part of the matrix layer.