Germanium (Ge) metal have a work function of around 4.7 eV and GeO have an electron affinity relative to Ge of around 2.4 eV and bandgap of 2.8 eV, which implies the valance band position for GeO is located at 7.1eV.
Inorganic GeO has never been crystallised. The stable oxide Ge is GeO2 (see J. Mater. Chem. C, 2013,1, 95-100). In attached paper is information about GeO2.
Perhaps this information will be of interest to anyone.
Do you mean the position of the conduction band offset?
Thin GeO2 layerd prepared by dry oxidation assisted with UV light show (by XPS): a valence band offset of 4.0 eV below the VB of Ge, and a conduction band offset of 1.04 eV above the CB of Ge.
Ref: Seiichi Miyazaki lab (Hiroshima University).
Other oxide growth condition will affect the offset due to the presence of charge trap states at the Ge/GeO2 interface and GeOx non-stechiometric oxide. You may take a look at Appl. Phys. Lett. 92, 022109 (2008), doi: 10.1063/1.2831668.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Material Characterization