MetallHalbleiterÜbergänge

MetallHalbleiterÜbergänge are interfaces formed between a metal and a semiconductor material. These junctions play a crucial role in semiconductor devices, influencing their electrical properties and functionality. When a metal comes into contact with a semiconductor, charge transfer occurs until the Fermi levels align, creating a depletion region or an accumulation region at the interface. The nature of this junction, whether it is rectifying (Schottky contact) or ohmic (ohmic contact), depends on the work function of the metal and the electron affinity of the semiconductor, as well as the presence of any interfacial layers. Schottky contacts exhibit a potential barrier, allowing current to flow primarily in one direction, which is the basis for Schottky diodes. Ohmic contacts, on the other hand, have a low resistance and facilitate efficient current injection or extraction into and out of the semiconductor, essential for transistor operation and interconnections. The fabrication and characterization of MetallHalbleiterÜbergänge are critical aspects of semiconductor device manufacturing.