Which element would be used to dope germanium to produce an n-type semiconductor?
A)Ga
B)Sn
C)Si
D)As
E)Cu

Question

Quizplus · Accepted Answer

Doping is the process of intentionally introducing impurities into a pure semiconductor crystal in order to change its electrical properties. To produce an n-type semiconductor, impurities with excess electrons must be added to the pure semiconductor. Therefore, the best choice for doping germanium to produce an n-type semiconductor is an impurity that has one more valence electron than germanium, such as arsenic (As) which has five valence electrons. Therefore, the answer is D.

Which Element Would Be Used to Dope Germanium to Produce