Which of the following is true about the mobility in semicon

Which of the following is true about the mobility in semiconductors such as Si as a function of increasing temperature and doping concentration?

A. Mobility increases with doping concentration and increases with temperature

B. Mobility increases wih doping concentration and decreases with temperature

C. Mobility decreases wih doping concentration and increases with temperature

D. Mobility decreases wih doping concentration and decreases with temperature

E. Mobility increases wih doping concentration and is independant of temperature

Solution

D is the correct answer. Both temperature and doping concentration will reduce the mobility of charge carriers.