Question

As doped with Si is which type of semiconductor

Answer 1

Answer:

n-type semiconductor

Explanation:

when a pentavalent impurity like phosphorous,arsenic, antimony etc..are added in sufficient quantity to the pure form of silicon and germanium crystal. each impurity atom has five valency electrons out of five valency electrons four electrons are needed to form covalent bonds with si and Ge atoms. 5th electron is very loosely bound and need less amount of energy to become a free electron therefore excess electrons are available for conduction and conductivity of semiconductor increases. each impurity atom atom forms for 4 covalent bonds with the 4 neighboring si and Ge stoms and donate 1free electron to the conduction band