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:
Aug. 27, 2013
Filed:
Oct. 11, 2007
Mohammad Khaja Nazeeruddin, Ecublens, CH;
Cedric Klein, Brumath, FR;
Michael Graetzel, Saint Sulpice, CH;
Mohammad Khaja Nazeeruddin, Ecublens, CH;
Cedric Klein, Brumath, FR;
Michael Graetzel, Saint Sulpice, CH;
Solvay (Societe Anonyme), Brussels, BE;
Abstract
This invention pertains to light emitting materials comprising novel ortho-metalated transition metal complexes [C^N]ML comprising two orthometalated ligands having imidazole moieties and an ancillary ligand of β-diketonate type. The ortho-metalated transition metal complexes are represented by formula (I): It has been surprisingly found that when the metal has bound thereto both orthometalated ligands comprising imidazole moieties and an ancillary ligand of β-diketonate type, the ligands advantageously participate in the emission process, significantly broadening emission in the visible region and enabling appreciable improvement of the white emission efficiency of complexes [C^N]ML. Additional objects of the invention are the use of the light emitting materials and organic light emitting device comprising the light emitting material.