What type of semiconductor is formed when pure silicon is doped with a pentavalent impurity like phosphorus or arsenic?

💡 Solution & Explanation

Doping pure silicon with a pentavalent impurity from group fifteen, such as phosphorus or arsenic, introduces extra free electrons and creates an n-type semiconductor where electrons serve as majority charge carriers. Conversely, trivalent dopants like boron create p-type semiconductors with electron deficiencies known as holes. Semiconductor physics forms a core component of science and technology curricula.