Organic electroluminescence generating devices

An electroluminescence generating device comprising:

• a channel comprising at least one layer of an organic semiconductor material, said channel being able to carry both types of charge carriers, said charge carriers being electrons and holes;
• an electron injector electrode, said electron injector electrode being in contact with said channel and positioned on top of a first side of said channel or within said channel, said electron injector electrode being able to inject electrons in said channel;
• a hole injector electrode, said hole injector electrode being spaced apart from said electron injector electrode, said hole injector electrode being in contact with said channel and positioned on top of a first side of said channel or within said channel, said hole injector electrode being able to inject holes in said channel, each of said electron injector electrode and said hole injector electrode being positioned in an essentially horizontal plane along said channel;
• and
• a control electrode positioned on said first side or on a second side of said channel, said control electrode being suitable for controlling the charge injection, the current flow and the charge recombination between the electron injector electrode and the hole injector electrode,
• said electroluminescence generating device being able to emit light by applying an electrical potential difference between said electron injector electrode and said hole injector electrode, wherein said electron injector electrode and said hole injector electrode have a different material composition.