THE INFLUENCE OF SURFACE-TREATMENT ON THE QUALITY OF PD AU CONTACTS TO P-TYPE ZNSE/

The influence of surface treatment prior to the deposition of Pd/Au me tallic contacts to p-type ZnSe is discussed, The methods studied being a sulphur based treatment and a CuSex contact treatment. The results show that both of these form better quality contacts, with lower appli ed voltages for set current densities, in comparison to an untreated s ample. Although, the barrier height increased for the sulphur treated sample, by 0.11 eV to 0.69 eV, the active contact area was increased b y an order of magnitude. The CuSex treatment is shown to reduce the Sc hottky barrier height to 0.50 eV but the active contact area was sever ely reduced in this case.