Non-stoichiometric cuprous oxidem,Cu_(2)O can bepreparedin thelaboratory. In this oxide, copper to oxygen ratio is slightly less than 2 :1 . Can you account for the fact that this substances is a a p -type semiconductor ?

Non-stoichiometric cuprous oxidem,Cu_(2)O can bepreparedin thelaborato

1.	Non-stoichiometric cuprous oxidem,Cu_(2)O can bepreparedin thelaboratory. In this oxide, copper to oxygen ratio is slightly less than 2 :1 . Can you account for the fact that this substances is a a p -type semiconductor ?
Answer» Solution :The RATIO less than 2:1 in ` Cu_(2)O` shows that somecuprous `(Cu^(+))` ions have been replaced by cupric ` (Cu^(2+))` ions. To maintion electrical neutrality , EVERY two ` Cu^(+)` ionswill be DUE to presence of these POSITIVE HOLES, hence it is a p-type semiconductor.