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CBSE - XII Science - Physics - Semiconductor Electronics

How can we say that both n-type semiconductors and p-type semiconductors are electrically neutral?????

Asked by rashiluvsuall 12th December 2011, 9:53 PM
Answered by Expert


The impurity atoms added to a pure semiconductor to make it n-type or p-type is neutral itself (i.e. pentavalent impurity for n-type and trivalent impurity for p-type. In doping we add only atoms and since they are neutral they are neutral after doping also, and hence the semiconductor as a whole remains electrically neutral.
Answered by Expert 13th December 2011, 11:26 AM

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