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:
Mar. 09, 2010
Filed:
Oct. 31, 2003
Chihaya Adachi, East Windsor, NJ (US);
Marc A. Baldo, Princeton, NJ (US);
Stephen R. Forrest, Princeton, NJ (US);
Chihaya Adachi, East Windsor, NJ (US);
Marc A. Baldo, Princeton, NJ (US);
Stephen R. Forrest, Princeton, NJ (US);
The University of Southern California, Los Angeles, CA (US);
The Trustees of Princeton University, Princeton, NJ (US);
Abstract
The present invention relates to an organic light emitting device structure having an organic light emitting device (OLED) over a substrate, where the OLED has, for example, an anode, a hole transporting layer (HTL), a first electron transporting layer (ETL) that is doped with a phosphorescent material, a second electron transporting layer (ETL), and a cathode. The OLEDs of the present invention are directed, in particular, to devices that include an emissive layer comprised of an electron transporting host material having a triplet excited state energy level that is higher than the emissive triplet excited state energy level of the phosphorescent dopant material.