The Fermi-level efficiency method and its applications on high interface trap density oxide-semiconductor interfaces

An interface characterization technique, termed the Fermi-level efficiency (FLE) method, is proposed for evaluating the passivation level of high trap density oxide-semiconductor interfaces. Based on the characteristic charge trapping time-energy relation and the conductance method, the FLE method examines the Fermi-level displacement at the oxide-semiconductor interface under applied gate bias. The obtained Fermi-level efficiencies can be used to assess the interface qualities of metal-oxide-semiconductor devices with III-V and other novel substrate materials.