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. 12, 2005
Filed:
Nov. 06, 2002
Bin MA, Monroeville, PA (US);
Robert W. Walters, Export, PA (US);
David B. Knowles, Apollo, PA (US);
Raymond Kwong, Plainsboro, NJ (US);
Yeh-jiun Tung, West Windsor, NJ (US);
Peter I. Djurovich, Long Beach, CA (US);
Mark E. Thompson, Anaheim, CA (US);
Bin Ma, Monroeville, PA (US);
Robert W. Walters, Export, PA (US);
David B. Knowles, Apollo, PA (US);
Raymond Kwong, Plainsboro, NJ (US);
Yeh-Jiun Tung, West Windsor, NJ (US);
Peter I. Djurovich, Long Beach, CA (US);
Mark E. Thompson, Anaheim, CA (US);
The University of Southern California, Los Angeles, CA (US);
Universal Display Corporation, Ewing, NJ (US);
Abstract
An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further comprises an emissive material having the structure:M may be a metal having an atomic weight greater than 40. Rmay be a substituent having a Hammett value less than about −0.17, between about −0.15 and 0.05, or greater than about 0.07. Rmay be H or any substituent. A may be a 5 or 6 member heteroaryl ring system. 'm' may be at least 1. 'n' may be at least zero. (X-Y) may be an ancillary ligand. The emissive material itself is also provided. The emissive material may have improved stability, and may provide a saturated blue emission.