TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The organic electronic device is an organic light emitting device comprising an anode, a hole injection layer, a hole transport layer, a light emitting layer, a hole and exciton blocking layer, an electron transport layer, an electron injection layer and a cathode, where the organic layer comprising (I) and (II) constitutes the electron transport layer.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: (I) is lithium quinolin-8-olate. The electron transport layer comprises a mixture of lithium quinolin-8-olate and 2,8-di-pyren-1-yl-4a,9b-dihydro-dibenzofuran. The electron injection layer comprises potassium fluoride or lithium quinolin-8-olate. The light emitting layer comprises substituted carbene compounds of formula ((L)m-(M1)(K1)o(carbene)n1) (III). (IX) is fac-iridium-tris(1,3-diphenylbenzimidazolin-2-yliden-C,C2'). The hole transport layer comprises fac-iridium-tris(1,3-diphenylbenzimidazolin-2-yliden-C,C2') doped with molybdenum oxide (MoOx), preferably molybdenum trioxide, or rhenium oxide (ReOx), preferably rhenium trioxide, where x is not defined.M1 = metal including Co, Rh, Ir, Nb, Pd, Pt, Fe, Ru, Os, Cr, Mo, W, Mn, Tc, Re, Cu, Ag or Au in any oxidation state possible for the respective metal;carbene = carbene ligand optionally uncharged or monoanionic and monodentate, bidentate or tridentate (with the carbene ligand is also a biscarbene or triscarbene ligand);L = monoanionic or dianionic ligand (optionally monodentate or bidentate);K1 = uncharged monodentate or bidentate ligand comprising phosphines, phosphine derivatives, phosphonates, phosphonate derivatives, arsenates, arsenate derivatives, phosphites, CO, pyridines, nitriles or conjugated dienes which form a pi complex with M1;n1 = number of carbene ligands (where n1 is at least 1);m = number of ligands L (where m is 0 or 1); ando = number of ligands K (where o is 0 or 1), where the sum of n1, m and 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, provided that n1 is at least 1. Preferred Definitions:    R81, R81 = substituted pyrene compounds of formula (a1), pyren-2-yl, pyren-4-yl, triphenylen-1-yl, triphenylen-2-yl, phenanthren-9-yl, phenanthren-1-yl, phenanthren-3-yl, phenanthren-2-yl, phenanthren-4-yl, 1,10-phenanthrolin-2-yl, 1,10-phenanthrolin-3-yl, 1,10-phenanthrolin-4-yl, 1,10-phenanthrolin-5-yl, dibenzothiophen-2-yl, dibenzothiophen-4-yl, 2,6-diphenyl-pyrimidin-4-yl, 4,6-diphenyl-(1,3,5)triazin-2-yl or 4,6-diphenyl-pyrimidin-2-yl;    R87 = H or 1-8C alkyl;    R91 = R81, dibenzofuran-2-yl or dibenzofuran-4-yl; and    R92 = R81 or H.    SPECIFIC COMPOUNDS - 63 Compounds (II) are specifically claimed e.g. 2,8-di-pyren-1-yl-4a,9b-dihydro-dibenzofuran of formula (IIa), 2-(7-tert-butyl-pyren-1-yl)-6-pyren-1-yl-dibenzofuran, 2,6-di-pyren-1-yl-dibenzofuran, 2-pyren-2-yl-8-pyren-1-yl-dibenzofuran and 2,8-di-pyren-2-yl-dibenzofuran.