CBSE Class 12-science Answered
How carrying by the electron in n type and by holes on the p type be explained by the logic of transfer of electron from normal to conduction band?
Asked by Pratyush Srivastava | 23 Dec, 2013, 07:11: PM
Expert Answer
In n-type semiconductor, due to addition of pentavelent impurity, there are electron energy levels near the top of the band gap so that they can be easily excited into the conduction band. In p-type semiconductor, due to the addition of trivalent impurity, extra holes in the band gap allow excitation of valence band electrons, leaving mobile holes in the valence band.
Answered by | 29 Dec, 2013, 11:27: PM
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