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Doping in semiconductor

by ahjie
Tags: doping, semiconductor
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ahjie
#1
Jul16-13, 10:37 PM
P: 9
When we dope pentavalent in semiconductor,it will introduce a allowable energy level below the conduction band
when dope a trivalent atom ,it will introduce a allowable energy level above valence band.

But why, why will have a energy level in between (below and above) ??
i cant figure it out, someone help me pls
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