Organic Light Emitting Device Comprising Polar Matrix and Metal Dopant

The present invention relates to an electronic device comprising at least one light emitting layer between an anode and a cathode, the device further comprising between the cathode and the anode at least one mixed layer comprising (i) in substantially elemental form, an electropositive element selected from Li, Na, K, Be, Sc, Y, La, Lu, Ti and V, and (ii) at least one substantially covalent electron transport matrix compound comprising at least one polar group selected from a phosphine oxide group, wherein the reduction potential of the substantially covalent electron transport matrix compound, if measured by cyclic voltammetry under the same conditions, has the value which is more negative than the value obtained for 4,7-diphenyl-1, 10-phenanthroline, preferably more negative than for (9-phenyI-9II-carbazole-2,7-diyl)bis(diphenylphosphine oxide), more preferably more negative than for (9,9-dihexyI-9H-fluorene-2,7-diyl)bis(diphenylphosphine oxide), highly preferably more negative than for 1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene, even more preferably more negative than for 3-phenyl-3H-benzo[b]dinaphto[2,1-d; 1 2′-fj]phosphepine-3-oxide, most preferably more negative than for pyrene and still preferably more negative than for [1,1′-binaphthalen]-2,2′-diylbis(diphenylphosphine oxide) or a diazole group, wherein the reduction potential of the substantially covalent electron transport matrix compound, if measured by cyclic voltammetry under the same conditions, has the value which is more negative than the value obtained for 4,7-diphenyl-1, 10-phenanthroline, preferably more negative than for (9-phenyl-9H-carbazole-2,7-diyl)bis(diphenylphosphine oxide), more preferably more negative than for (9,9-dihexyl-9H-fluorene-2,7-diyl)bis(diphenylphosphine oxide), highly preferably more negative than for 1,3,5-tris(1-phenyl-1 II-benzimidazol-2-yl)benzene, even more preferably more negative than for 3-phenyl-3H-benzo[b]dinaphto[2,1-d:1′,2′-fj]phosphepine-3-oxide, most preferably more negative than for pyrene and still preferably more negative than for [1,1′-binaphthalen]-2,2′-diylbis(diphenylphosphine oxide), a process for manufacturing the same and a compound comprised therein.