The variation of conductivity of n-type semiconductor with temperature has to be explained. Concept Introduction: Semiconductors are those materials which has an ability to control the flow of charge carrier in it. There are mainly two type semiconductors; intrinsic and extrinsic semiconductors. In extrinsic semiconductor an impurity is added to improve the conductivity. Extrinsic semiconductor is classified as p-type semiconductor and n-type semiconductor depending on the carriers present in it. p-type semiconductor: If a group 14 elements is doped with atoms of group 13 elements, then an electron can be transferred from 14 t h group element to 13 t h group element by creating a hole in the valence band which increases the conductivity. These types of semiconductors are called p-type semiconductors. n-type semiconductor: If 15 t h group elements are used as dopant for 14 t h group elements an electron will be transferred to conduction band results in increase in conductivity. These types of semiconductors are called n-type semiconductors.

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Chapter 15, Problem 15E.5P

Interpretation Introduction

Interpretation:

The variation of conductivity of n-type semiconductor with temperature has to be explained.

Concept Introduction:

Semiconductors are those materials which has an ability to control the flow of charge carrier in it. There are mainly two type semiconductors; intrinsic and extrinsic semiconductors. In extrinsic semiconductor an impurity is added to improve the conductivity. Extrinsic semiconductor is classified as p-type semiconductor and n-type semiconductor depending on the carriers present in it.

p-type semiconductor: If a group 14 elements is doped with atoms of group 13 elements, then an electron can be transferred from 14th group element to 13th group element by creating a hole in the valence band which increases the conductivity. These types of semiconductors are called p-type semiconductors.

n-type semiconductor: If 15th group elements are used as dopant for 14th group elements an electron will be transferred to conduction band results in increase in conductivity. These types of semiconductors are called n-type semiconductors.

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