The Total solution for NCERT class 6-12
Non-stoichiometriccuprous oxide, Cu2O can be prepared in laboratory. In this oxide,copper to oxygen ratio is slightly less than 2:1. Can you account for the factthat this substance is a p-type semiconductor?
In the cuprous oxide (Cu2O) prepared in the laboratory, copper to oxygen ratio is slightlyless than 2:1. This means that the number of Cu+ ions is slightly less than twice the number of O2− ions. This is because some Cu+ ions have been replaced by Cu2+ ions. Every Cu2+ ion replaces twoCu+ ions, thereby creating holes. As a result,the substance conducts electricity with the help of these positive holes.Hence, the substance is a p-type semiconductor.