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Which one of the following is not an intrinsic semiconductor?

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in Engineering Physics II by (679k points)
Which one of the following is not an intrinsic semiconductor?

(a) Carbon

(b) Silicon

(c) Germanium

(d) Lead

The question was asked by my college professor while I was bunking the class.

My query is from Classification of Semiconductors in division Semiconductors of Engineering Physics II

1 Answer

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Best answer
Right answer is (a) Carbon

Easiest explanation: There are 4 bonding electrons in all the above materials. However, the energy required to take out an electron will be maximum for carbon as the valence electrons are in the second orbit. Hence, the number of free electrons for conduction is negligibly small in C.

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