what makes indium oxide n-type, it is the only holes or some other reason? and reason behind wide band gap?
Hi Indra,
Oxygen vacancy is a common native point defect in metal oxides like In2O3, ZnO etc and that is the responsible for n-type conductivity.
The wide band gap of Indium oxide can be explained based on the molecular orbital theory where atomic orbital energy of the oxygen in lower than indium and as a whole the conduction band is much higher than valance band.
As mentioned by @Sujoy Sarkar, the wide band gap was developed in this material. But, the conduction is due to the unsatisfied Indium ions in the compound. This causes a difference in ionic concentration which causes charges to flow through ionic conduction
Hi Indra,
Please, go through the pdf files provided here. I think, these will be helpful.
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