Germanium is a semiconductor .Which of the following should be added in small amounts to produce a p-type semiconductor?
A) Bi
B) As
C) P
D) Sb
E) B

Question

Quizplus · Accepted Answer

Boron (B) is typically added in small amounts to produce a p-type semiconductor. This is because boron has one fewer valence electron than germanium, which creates a "hole" in the crystal lattice that acts as a positive charge carrier. Choice A, Bi, does not create a hole in the crystal lattice as it has too many valence electrons. Choices B, C, and D, As, P, and Sb, respectively, have too many electrons to create a hole and also do not fit well within the crystal lattice of germanium, making them less effective dopants.

Germanium Is a Semiconductor