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:
Jan. 31, 2012
Filed:
Oct. 10, 2007
Mark E. Thompson, Anaheim Hills, CA (US);
Raymond Kwong, Plainsboro, NJ (US);
Yeh-jiun Tung, Princeton, NJ (US);
Jason Brooks, Lambertville, NJ (US);
Mark E. Thompson, Anaheim Hills, CA (US);
Raymond Kwong, Plainsboro, NJ (US);
Yeh-Jiun Tung, Princeton, NJ (US);
Jason Brooks, Lambertville, NJ (US);
Universal Display Corporation, Ewing, NJ (US);
The University of Southern California, Los Angeles, CA (US);
Abstract
A device is provided, having an anode, a cathode, and two adjacent organic layers disposed between the anode and the cathode. One organic layer is a phosphorescent emissive material. The other organic layer may comprise an aromatic hydrocarbon material, comprising an aromatic non-heterocyclic hydrocarbon core optionally substituted, and wherein the substituents are the same or different, and each is selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, heteroalkyl, substituted aryl, substituted heteroaryl and heterocyclic groups. The second organic layer may comprise a material having a molecular dipole moment less than about 2.0 debyes, such that the device has an unmodified external quantum efficiency of at least about 3% and a lifetime of at least about 1000 hours at an initial luminance of about 100 to about 1000 cd m.