Question

A semiconductor with excess of electrons is called p-type semiconductor. True or false

Answer 1

false (it is n type semiconductor)

Answer 2

False. The semiconductor with an excess of electrons is an n-type semiconductor.

p-type semiconductor

• A p-type extrinsic semiconductor is the one, in which the semiconductor is doped with the trivalent (having valency 3) elements.
• The impurities provide an excess of holes in the semiconductor. Hence, holes are the majority charge carriers in p-type semiconductors.

n-type semiconductor

• An n-type extrinsic semiconductor is the one, in which the semiconductor is doped with the pentavalent (having valency 5) elements.

• The impurities provide an excess of electrons in the semiconductor. Hence, electrons are the majority charge carriers in n-type semiconductors.

P-type semiconductors are doped with the trivalent impurities, hence they have holes as their majority charge carriers, while the n-type semiconductors have electrons as their majority charge carriers due to pentavalent doping.