Patent ID: 7768191
Filing Date: 2010-08-03
Classification: C07F,C09K,H01L,H05B

Abstract:
1. An electroluminescent device with an organic electroluminescent layer comprising a light-emitting material including a first isomer of an iridium complex in a quantity higher than 90%, in relation to the total quantity of the light-emitting material, wherein the iridium complex comprises an iridium complex Ir(III)L1L2L3 for emitting light with a central iridium ion Ir(III), with a ligand L3 as a dionate selected from the group consisting of: pentane-2,4-dionate (acac), 2,2,6,6-tetramethyl-3,5-heptandionate (thd), 7,7-dimethy-1,1,1,2,2,3,3-heptyfluoro-4,6-octandionate (fod), 4,4,4-trifluorol-(2-thienyl)butane-1,3-dionate (ttfa), 1,3-diphenylpropane-1,3- dionate (dbm), 4,4,4-trifluoro-1-(2-naphthyl)butane-1,3-dionate (tfnb) or 4,4,4-trifluoro-1-(1-naphthyl)butane-1,3-dionate and with two rigid aromatic ligands L1 and L2 with one nitrogen and carbon atom, sharing in the ligand bond, each, wherein the iridium complex Ir(III)L1L2L3 is present as a first isomer, in which the nitrogen atom of the ligand L1 sharing in the ligand bonding and the nitrogen atom of the ligand L2 sharing in the ligand bonding are juxtaposed relative to the central iridium ion, wherein L1 an L2 are dibenzo[f,h] chinoline and L3 is pentane-2,4-dionate (acac).