What is a Semiconductor and difference between n-type and p-type?

Semiconductor & Types (n-type vs p-type):

• Semiconductor: Material (Silicon, Germanium) with electrical conductivity between conductors and insulators.
• n-type Semiconductor: Doped with pentavalent impurities (Phosphorus, Arsenic); majority charge carriers are free electrons.
• p-type Semiconductor: Doped with trivalent impurities (Boron, Aluminium); majority charge carriers are holes.