Organic electronic device comprising a substrate, an anode layer, a cathode layer, at least one first emission layer, and a hole injection layer that comprises a metal complex

An organic electronic device comprising a substrate, an anode layer, a cathode layer, at least one first emission layer, and a hole injection layer, wherein

• the hole injection layer comprises a metal complex, wherein the metal complex has the formula (I)—
• Mn(L⊖)n (I),
• wherein
• M is a metal ion,
• n is the valency of M,
• L is a ligand comprising at least 4 covalently bound atoms, wherein the at least 4 covalently bound atoms comprise (i) at least three carbon atoms or at least four carbon atoms, (ii) at least two oxygen atoms or one oxygen and one nitrogen atom, two to four oxygen atoms, or two to four oxygen atoms and zero to two nitrogen atoms, (iii) at least one or more groups selected from halogen, CN, substituted or unsubstituted C1 to C6 alkyl, or substituted or unsubstituted C1 to C6 alkoxy, two or more groups selected from halogen, CN, substituted or unsubstituted C1 to C6 alkyl, or substituted or unsubstituted C1 to C6 alkoxy, at least one or more groups selected from halogen, CN, substituted C1 to C6 alkyl, or substituted C1 to C6 alkoxy, two or more groups selected from halogen, CN, perfluorinated C1 to C6 alkyl, or perfluorinated C1 to C6 alkoxy, or one or more groups selected from substituted or unsubstituted C1 to C6 alkyl, substituted or unsubstituted C6 to C12 aryl, or substituted or unsubstituted C3 to C12 heteroaryl, or (iv) a combination thereof,
• wherein the substituents are selected from D, C6 aryl, C3 to C9 heteroaryl, C1 to C6 alkyl, C1 to C6 alkoxy, C3 to C6 branched alkyl, C3 to C6 cyclic alkyl, C3 to C6 branched alkoxy, C3 to C6 cyclic alkoxy, partially or perfluorinated C1 to C16 alkyl, partially or perfluorinated C1 to C16 alkoxy, partially or perdeuterated C1 to C6 alkyl, partially or perdeuterated C1 to C6 alkoxy, COR3, COOR3, halogen, CN, or a combination thereof;
• wherein R3 is selected from C6 aryl, C3 to C9 heteroaryl, C1 to C6 alkyl, C1 to C6 alkoxy, C3 to C6 branched alkyl, C3 to C6 cyclic alkyl, C3 to C6 branched alkoxy, C3 to C6 cyclic alkoxy, partially or perfluorinated C1 to C16 alkyl, partially or perfluorinated C1 to C16 alkoxy, partially or perdeuterated C1 to C6 alkyl, partially or perdeuterated C1 to C6 alkoxy, or a combination thereof,
• n is an integer from 1 to 4, and wherein the charge neutral form of M has an electro-negativity value according to Allen of less than 2.4;
• the anode layer comprises a first anode sub-layer and a second anode sub-layer, wherein
• the first anode sub-layer comprises a first metal having a work function in the range of ≥4 and ≤6 eV, and
• the second anode sub-layer comprises a transparent conductive oxide;
• wherein
• the hole injection layer is arranged between the first emission layer and the anode layer,
• the first anode sub-layer is arranged closer to the substrate, and
• the second anode sub-layer is arranged closer to the hole injection layer.