ORGANIC LIGHT EMITTING DEVICE, A METHOD FOR MANUFACTURING THE SAME AND A COMPOSITION FOR USE THEREIN

The present invention relates to an organic light emitting device comprising an anode, a cathode, at least two emission layers, and at least one charge generation layer, wherein the at least two emission layers are arranged between the anode and the cathode and wherein the at least one charge generation layer is arranged between two of the at least two emission layers; wherein the charge generation layer comprises a n-type sub-layer and a p-type sub-layer, wherein the n-type sub-layer comprises a) at least one first organic compound, the first organic compound comprising at least one group P=X, wherein X is selected from O, S and Se; b) at least one second organic compound, the second organic compound comprising at least one metal complexing group, alternatively two metal complexing groups; and c) a zero-valent metal dopant, wherein the zero-valent metal dopant is a metal selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals, group 3 transition metals and mixtures thereof; a method for preparing the same and a composition for use therein.