US 7,320,835 B2
Phosphorescent material
Norman Herron, Newark, Del. (US)
Assigned to E. I. du Pont de Nemours and Company, Wilmington, Del. (US)
Filed on Dec. 14, 2004, as Appl. No. 11/12,036.
Application 11/012036 is a continuation in part of application No. 10/650323, filed on Aug. 28, 2003, granted, now 7,198,730.
Prior Publication US 2005/0196637 A1, Sep. 08, 2005
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 51/54 (2006.01); C09K 11/06 (2006.01)
U.S. Cl. 428—690  [428/917; 313/504; 313/506; 257/40; 257/E51.044; 546/4; 556/21] 24 Claims
 
1. An organometallic complex composition of matter, the composition comprising:
a hexacoordinate transition metal, M, selected from Ir, Os, Ru, and Rh;
a first monoanionic bidentate ligand having Formula V

OG Complex Work Unit Drawing
a hydride ligand;
a second monoanionic bidentate ligand comprising a phosphino alkoxide; and
a monodentate phosphine ligand;
wherein
R4 is a group comprising an unsaturated 5-membered heteroring containing nitrogen and attached via the nitrogen, and
R5 and R6 are independently selected from H, alkyl, fluoroalkyl, fluoroalkylsulfonate, alkoxy, fluoroalkoxy, carboxyl, and cyano, and R5 is also selected from —C(CF3)OCH3.