The hole and the free electron concentrations | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Given,the intrinsic carrier concentration $n_{i} = 1.4 	imes 10^{16} \ m^{-3}$.According to the law of mass action for semiconductors,the product

Vedclass · Accepted Answer

$0.49 	imes 10^{10} \ m^{-3}$

Vedclass · Answer

(A) Given,the intrinsic carrier concentration $n_{i} = 1.4 	imes 10^{16} \ m^{-3}$.According to the law of mass action for semiconductors,the product of hole concentration $(n_{h})$ and electron concentration $(n_{e})$ is equal to the square of the intrinsic carrier concentration $(n_{i}^2)$:$n_{i}^2 = n_{h} 	imes n_{e}$Given $n_{h} = 4 	imes 10^{22} \ m^{-3}$,we need to find $n_{e}$.$n_{e} = \frac{n_{i}^2}{n_{h}}$$n_{e} = \frac{(1.4 	imes 10^{16})^2}{4 	imes 10^{22}}$$n_{e} = \frac{1.96 	imes 10^{32}}{4 	imes 10^{22}}$$n_{e} = 0.49 	imes 10^{10} \ m^{-3}$.

The hole and the free electron concentrations in a pure silicon at room temperature are given by $1.4 \times 10^{16} \ m^{-3}$ each under equilibrium. When it is doped with indium and the hole concentration is $n_{h} = 4 \times 10^{22} \ m^{-3}$,the electron concentration is

Similar Questions

In a $P$-type semiconductor,the energy level formed in the forbidden gap near the valence band is called ...

Explain the concept of the hole in the semiconductor.

If $n_e$ and $v_d$ are the number density of electrons and drift velocity in a semiconductor,respectively,what happens when the temperature is increased?

Which of the following energy band diagrams shows the $N$-type semiconductor?

In the energy band diagram of a material shown below,the open circles and filled circles denote holes and electrons respectively. The material is

Vedclass Test Series

Exam Paper Generator

Online Exam Module