Questions

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

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group III element

group IV element

group V element

none of these

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detailed solution

Correct option is C

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.

Similar Questions

A silicon specimen is made into a P-type semi-conductor by doping, on an average, one indium atom per $5 \times 10^{7}$ silicon atoms. If the number density of atoms in the silicon specimen is $5 \times 10^{28}$ atoms $m^{- 3},$ then the number of acceptor atoms in silicon per cubic centimetre will be