Pure Si at 500, K has equal number of electro | vedclass

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

Question

(B) For an intrinsic semiconductor,the law of mass action states that $n_i^2 = n_e n_h$,where $n_i$ is the intrinsic carrier concentration.Given $n_i

Vedclass · Accepted Answer

$p$-type having electron concentration $n_e = 5 	imes 10^9 \,m^{-3}$

Vedclass · Answer

(B) For an intrinsic semiconductor,the law of mass action states that $n_i^2 = n_e n_h$,where $n_i$ is the intrinsic carrier concentration.Given $n_i = 1.5 	imes 10^{16} \,m^{-3}$.After doping with indium (a trivalent impurity),the hole concentration increases to $n_h = 4.5 	imes 10^{22} \,m^{-3}$.Using the relation $n_e = \frac{n_i^2}{n_h}$:$n_e = \frac{(1.5 	imes 10^{16})^2}{4.5 	imes 10^{22}}$$n_e = \frac{2.25 	imes 10^{32}}{4.5 	imes 10^{22}}$$n_e = 0.5 	imes 10^{10} = 5 	imes 10^9 \,m^{-3}$.Since $n_h > n_e$,the semiconductor is $p$-type.

Pure $Si$ at $500\, K$ has equal number of electron $(n_e)$ and hole $(n_h)$ concentrations of $1.5 \times 10^{16} \,m^{-3}$. Doping by indium increases $n_h$ to $4.5 \times 10^{22} \,m^{-3}$. The doped semiconductor is of

Similar Questions

Let $f(0)=1, f(0.5)=\frac{5}{4}, f(1)=2, f(1.5)=\frac{13}{4}$ and $f(2)=5$. Using Simpson's rule,$\int_0^2 f(x) dx$ is equal to

The height to which a cylindrical vessel must be filled with a homogeneous liquid,so that the average force with which the liquid presses the side of the vessel is equal to the force exerted by the liquid on the bottom of the vessel,is equal to:

From which part of the plant is cocoa obtained from $Theobroma$ $cacao$?

When a tuning fork of frequency $341 \ Hz$ is sounded with another tuning fork,six beats per second are heard. When the second tuning fork is loaded with wax and sounded with the first tuning fork,the number of beats is two per second. The natural frequency of the second tuning fork is (in $Hz$)

How many primary amines are possible for the formula $C_4H_{11}N$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module