Write a short note on N type semiconductor.

Explanation:

When pentavalent elements are added in pure semiconductors as an impurity, n-type semiconductor is formed. Pentavalent elements like phosphorus have five valence electron in their outer shell out of which four forms a covalent bond with the four electrons of the element out of which semiconductor is formed and the remaining one electron is free to move inside the semiconductor. As electron have a negative charge the name of the semiconductor is kept as n-type semiconductor.

Final Answer:

Hence, n-type semiconductor is a semiconductor that have free electrons inside them due to doping.