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Non-stoichiometric cuprous oxide (Cu2O) ...

Non-stoichiometric cuprous oxide `(Cu_2O)` can be prepared in the laboratory. In this oxide, copper to oxygen ratio is sloghtly less than 2 : 1 can you account for the fact that this substance is p-type semiconductor

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i) The ratio less than 2 : I in `C_(42)` O shows that some cuprous `(Cu^+)` have been replaced by `Cu^(2+)` ion.
ii) Every two `Cu^+` ions replaced by cupric `(Cu^(2+)` ions there by creating a hole.
iii) Conduction is due to these positive holes, hence it is a p-type semiconductor
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