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:
Apr. 22, 2008
Filed:
Apr. 16, 2004
Applicants:
Chi-ming Che, Hong Kong, CN;
Siu-chung Chan, Hong Kong, CN;
Inventors:
Chi-Ming Che, Hong Kong, CN;
Siu-Chung Chan, Hong Kong, CN;
Assignee:
The University of Hong Kong, Hong Kong, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 19/00 (2006.01); H01J 63/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed are emissive materials of formula (I) or (II), comprising two bidentate NO-type ligands, or a tetradentate NOON-type ligand, and a transition metal. The emissive materials are useful as electrophosphorescent emitters in organic light-emitting devices. Also disclosed are methods for preparing organic light-emitting diodes comprising these emissive materials, and the use of such diodes as white and yellow organic light-emitting devices.