Patent ID: 7960723

Claim:
A stacked electro-optically active organic diode comprising: an anode electrode layer; a cathode electrode layer; a first electro-optically active organic layer arranged between said electrode layers; a second electro-optically active organic layer arranged between said first electro-optically active organic layer and said cathode electrode layer; a low electron affinity layer arranged between the first electro-optically active organic layer and the second electro-optically active organic layer, said low electron affinity layer having a thickness of at least 50 Å and being formed of a first transparent inorganic semiconductor material; and a high electron affinity layer arranged between said second electro-optically active organic layer and the low electron affinity layer, said high electron affinity layer being formed of a second transparent inorganic semiconductor material, wherein said second transparent inorganic semiconductor material has a higher electron affinity than said first inorganic semiconductor material.