Question

What is doping in semiconductors?

Answer 1

Answer:Pure semiconductor is of very little importance because it conducts very little current at normal temprature. Electrical conductivity of this pure semiconductor material can be increased by many times by adding small amount of impurity to it. Approximately one million of atoms of pure semiconductor is mixed with one atom of impurity during the process of crystallization.. This process of adding impurity to pure semiconductor in order to make it more electrical conductive is called Doping.

Pure semiconductor is called instrinsic and impurity is known as extrinsic semiconductors. There are two types of impurities

1. Donor type or N-tyoe
2. Acceptor type or P-type.