Process for forming an organic light-emitting diode and devices made by the process

A process for forming a multicolor organic light-emitting diode having first, second and third subpixel areas, said process comprising:

• applying a hole injection layer over an anode layer, said hole injection layer comprising at least one conductive polymer and a fluorinated acid polymer;
• applying a hole transport layer over the hole injection layer, said hole transport layer comprising a hole transport material and at least one fullerene;
• applying a first electroluminescent material to the first subpixel areas;
• applying a second electroluminescent material to the second subpixel areas;
• applying a blue electroluminescent material overall;
• applying a cathode;
• wherein the first and second electroluminescent materials are selected from the group consisting of green electroluminescent materials and red electroluminescent materials;
• with the proviso that the second electroluminescent material emits a color different from that of the first electroluminescent material.