First slide
Classification of semi-conductors

To convert an intrinsic semiconductor to an extrinsic one with electrons as majority carriers, the intrinsic semiconducting material must be doped with


For the semiconductor to have majority carriers as electron, it must be doped with group v element. Because four electrons will make covalent bonds with intrinsic one and one electron for every doping atom will remain free and won't form any covalent bond with the host atom.

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