Ambipolar surface conduction in oxygen sub-stoichiometric molybdenum oxide films.

ABSTRACT: The surface electric conduction in amorphous and crystallized molybdenum oxide films was studied as a function of electronic structure by current-voltage and simultaneous spectroscopic ellipsometry measurements on structures of the kind Al/Molybdenum oxide (MoO_x)/Al, at temperatures up to 400 °C and in ambient air. At room temperature, both amorphous and crystalline MoO_x samples were found to be sub-stoichiometric in oxygen. The random distribution of oxygen vacancies and the imperfect atomic ordering induced the creation of an intermediate band (IB) located near the valence band and of individual electronic gap states. At temperatures below 300 °C, the conduction was found to exhibit ambipolar character in which electrons and holes participated, the former moving in

SUBMITTER: Soultati A 

PROVIDER: S-EPMC10689454 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature