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//Calculation of barrier potential
// Example 3.1
// Page no 80
clc;
clear all;
close;
//Given data
p=5; // Resistivity of p-region
n=2; // Resistivity of n-region
mu=3900;
k=0.026; //Boltzmann constant
ni=2.5*10^13; //Density of the electron hole pair
e=1.6*10^-19; //charge of electron
//Barrier potential calculation
r0=(1/p); // Reflection at the fiber air interface
r1=(1/n);
m=r1/(mu*e);
p=6.5*10^14; //Density of hole in p -region
Vb=k*log(p*m/ni^2);
//Displaying the result in command window
printf("\n Barrier potential(in V) = %0.3f",Vb);
// The answers vary due to round off error
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