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:
Jul. 19, 2016
Filed:
Mar. 13, 2015
Applicant:
Universal Display Corporation, Ewing, NJ (US);
Inventors:
Mauro Premutico, Brooklyn, NY (US);
Chuanjun Xia, Lawrenceville, NJ (US);
Chun Lin, Yardley, PA (US);
Assignee:
Universal Display Corporation, Ewing, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/08 (2006.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5012 (2013.01); H01L 51/5016 (2013.01); H01L 51/5024 (2013.01);
Abstract
An OLED having an organic layer formed of a dopant and a host, where the organic layer is disposed between an anode and a cathode is disclosed. The dopant's concentration level in the organic layer, along a direction perpendicular to the first and second planar surfaces of the organic layer, defines a novel concentration gradient that enhances the OLED's efficiency.