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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ravi prakash yadav
see the attachment
But sir, These Electron and Holes haven't any positive role to make a semiconductor Device. there are positive role of those electron and holes which obtain by doping. So How The Carrier concentration will be the answer!!!!
Band gap is simply the energy difference between valence band and conduction band. It has nothing to do with doping. I am attaching some more screenshots,have a look for better understanding.