ABSTRACT
In the ambipolar OLET configuration, the source and drain are interchangeable for either of the charge carriers, that is, the holes and electrons. On the application of the electric field between the source and drain, the holes and electrons are driven to the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), respectively. When opposite charges are combined to form an exciton, radiative recombination takes place and the exciton annihilates in the form of light photon and the rest in heat. Good electrical properties and intense light emission of OLETs depends on different structure-related concerns, processing and characterization conditions, device architecture, and choice of electrode materials.
