First slide

Classification of semi-conductors

Question

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

Easy

A

group III element
B

group IV element
C

group V element
D

none of these

Solution

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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