Patent ID: 8377740
Filing Date: 2013-02-19
Classification: B01J,C07F,C09B,C09K,H01L,Y02P

Abstract:
1. An organic light-emitting diode comprising at least one uncharged transition metal complex of the formula (I) comprising at least one carbene ligand wherein the symbols have the following meanings: M carbene is a carbene ligand selected from the group consisting of the following formulae wherein Z, Z′ are identical or different and are each CH or N; R t and t′ are identical or different and are each from 0 to 3, and when t or t′ >1 the radicals R R L is a monoanionic or dianionic ligand, which may be monodentate or bidentate; K is an uncharged monodentate or bidentate ligand selected from the group consisting of phosphines; phosphonates and derivatives thereof, arsenates and derivatives thereof; phosphites; CO; pyridines; nitriles and conjugated dienes which form a π complex with M n is the number of carbene ligands, wherein n is at least 1 and when n>1 the carbene ligands in the complex of the formula I can be identical or different; m is the number of ligands L, wherein m can be 0 or ≧1 and when m>1 the ligands L can be identical or different; o is the number of ligands K, wherein o can be 0 or ≧1 and when o>1 the ligands K can be identical or different; wherein the sum n+m+o is dependent on the oxidation state and coordination number of the metal atom and on the denticity of the ligands carbene, L and K and also on the charge on the ligands carbene and L, with the proviso that n is at least 1.