Question

Give details about the term Extrinsic semiconductor. (Atleast 6-7 lines)

Answer 1

Extrinsic Semiconductor
A semiconductor to which an impurity at controlled rate is added to make it conductive is known as an extrinsic Semiconductor.

An intrinsic semiconductor is capable to conduct a little current even at room temperature, but it is not useful for the preparation of various electronic devices. Thus, to make it conductive a small amount of suitable impurity is added to the material.

following are given in my books & hope it really helps u

Answer 2

Hey there!

If an intrinsic semiconductor such as the above is added a small percentage of impurities, ie trivalent or pentavalent elements, the semiconductor is called extrinsic, and is said to be doped. The impurities must form part of the crystalline structure substituting the corresponding silicon atom.

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