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Non-stoichiometric cuprous oxide. Cu(2)O...

Non-stoichiometric cuprous oxide. `Cu_(2)O` can be perpared in laboratory. In this oxide, copper-to-oxygen ratio is slightly less than 2 : 1. can you account for the fact that this substance is a p-type semiconductors?

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The ratio less than 2:1 in ` Cu_(2)O` shows that some cuprous `(Cu^(+))` ions have been replaced by cupric ` (Cu^(2+))` ions. To maintion electrical neutrality , every two ` Cu^(+)` ions will be due to presence of these positive holes, hence it is a p-type semiconductor.
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