Electronic Devices - Semiconductors - Discussion

Adding pentavalent impurity makes access of electrons within the semiconductor and thus calling it n type.

N-type semiconductor (extrinsic/impure semiconductor) fermi energy level in near to the conducting bond.

n-type means it is a intrinsic semiconductor first of all...

N type semiconductor is a lower conductor. When a pentavalent impurity add in n type semiconductor than it generate a free electron. So it is use for conduct.

If doping increases the conductivity then why it is called ADDING OF IMPURITIES.

N-type Semiconductor :

An intrinsic semiconductor material is a poor conductor and is pure semiconductor. When a small amount of impurity, either trivalent or pentavalent, is added/ doped into the intrinsic material its conductivity rises sharply.

N-type material formed after the addition of pentavalent impurity to the intrinsic semiconductor material is called N-type material. Addition of small amount of pentavalent atoms in the intrinsic material provides large number of free electrons for conduction.

Intrinsic semiconductors are pure semiconductors. The process of adding impurity to the pure form of semiconductor is called doping and the semiconductor thus obtained is called extrinsic semiconductors. Pentavalent impurity produce n- type and trivalent produce p- type semiconductors.