Which of the following is an n-type semiconductor?
A) Silicon doped with phosphorus
B) Silicon doped with boron
C) GaAs with gallium in excess of arsenic
D) Selenium doped with indium
E) Germanium doped with indium

Question

Quizplus · Accepted Answer

N-type semiconductors are created by doping an intrinsic semiconductor with an impurity that has more valence electrons than the semiconductor material. This creates a surplus of negatively charged electrons, which make the material conductive. Phosphorus has 5 valence electrons, while silicon has 4, so doping silicon with phosphorus creates an n-type semiconductor. The other options do not meet this criteria.

Which of the Following Is an N-Type Semiconductor