Chapter 7, Problem 30E

Interpretation Introduction

Interpretation:

$\begin{array}{l}n-\text{types semiconduct}\\ \\ \\ \\ \end{array}$

Intrinsic semiconductor:

Pure form of semiconductor $\left(\text{Si, Ge}\right)$ is called intrinsic semiconductor it has equal number of holes and free electrons.

Extrinsic semiconductor:

When very small amount of impurity either trivalent or pentavalent is mixed, obtain extrinsic semiconductor.

Concept used:

$n-\text{type}$ Semiconductor formed by mixing pentavalent atom $\left(\text{like P}\right)$ with pure $\text{Si or Ge and p}-\text{type}$ semiconductor formed by mixing trivalent atom like $\text{Indium }\left(In\right),\text{ Boron }\left(B\right),\text{ Aluminium}\left(Al\right)$ etc. with pure $\text{Si or Ge}$.

To determine: the difference between a $n-\text{type}$ semiconductor and a $\text{p}-\text{ type}$ semiconductor