updated the code

1 files changed, 27 insertions, 28 deletions

diff --git a/1952/CH7/EX7.2/Ex7_2.sce b/1952/CH7/EX7.2/Ex7_2.sce
index 0d534a552..fb1c40a9c 100755
--- a/1952/CH7/EX7.2/Ex7_2.sce
+++ b/1952/CH7/EX7.2/Ex7_2.sce
@@ -1,28 +1,27 @@
-// chapter 7 , Example 7.2 , pg 208

-ni=1.5*10^10      //intrinsic concentration   (in cm^-3)

-Nd=10^16    //donor concentration   (in atoms/cm^3)

-T=300     //temperature    (in K)

-e=1.6*10^-19    //charge of electron    (in C)

-k=1.38*10^-23     //Boltzmann constant    (in J/K)

-n0=Nd     //Assuming  n0=Nd      ( since    Nd >> ni)

-p0=ni^2/n0     //hole concentration

-E=k*T*log(n0/ni)     // E=(Ef-Ei)    location of Ef relative to Ei

-printf("Hole concentration (in cm^-3)")

-disp(p0)

-printf("Location of Ef relative to Ei   (in eV)")

-disp(E/e)

-x = linspace(-5.5,5.5,51);

-y = 1 ;

-

-scf(2);

-clf(2);

-plot(x,y+0.1);

-

-plot(x,y,'ro-');

-plot(x,y-0.347,'--');

-plot(x,y*0,'bs:');

-xlabel(["x axis";"(independent variable)"]);

-ylabel("Energy level (eV)");

-title("Band diagram");

-legend(["Ec";"Ef";"Ei";"Ev"]);

-set(gca(),"data_bounds",matrix([-6,6,-0.1,1.1],2,-1));

+// chapter 7 , Example 7.2 , pg 208
+ni=1.5*10^10      //intrinsic concentration   (in cm^-3)
+Nd=10^16    //donor concentration   (in atoms/cm^3)
+T=300     //temperature    (in K)
+e=1.6*10^-19    //charge of electron    (in C)
+k=1.38*10^-23     //Boltzmann constant    (in J/K)
+n0=Nd     //Assuming  n0=Nd      ( since    Nd >> ni)
+p0=ni^2/n0     //hole concentration
+E=k*T*log(n0/ni)     // E=(Ef-Ei)    location of Ef relative to Ei
+printf("Hole concentration (in cm^-3)")
+disp(p0)
+printf("Location of Ef relative to Ei   (in eV)")
+disp(E/e)
+x = linspace(-5.5,5.5,51);
+y = ones(length(x),1);
+
+scf(2);
+clf(2);
+plot(x,y+0.1);
+
+plot(x,y,'ro-');
+plot(x,y-0.347,'--');
+plot(x,y*0,'bs:');
+xlabel(["x axis";"(independent variable)"]);
+ylabel("Energy level (eV)");
+title("Band diagram");
+set(gca(),"data_bounds",matrix([-6,6,-0.1,1.1],2,-1));
\ No newline at end of file