2 files changed, 30 insertions, 0 deletions
diff --git a/3636/CH5/EX5.9/Ex5_9.sce b/3636/CH5/EX5.9/Ex5_9.sce
new file mode 100644
index 000000000..b2836059f
--- /dev/null
+++ b/3636/CH5/EX5.9/Ex5_9.sce
@@ -0,0 +1,26 @@
+clc;
+clear;
+Na=10^15 //doping densities in cm^-3
+Nd=10^17 //in cm^-3
+V=0.5 //in V
+e=1.6*10^-19 //in J
+nn0=10^17 //in cm^-3
+ni=1.5*10^10 //in cm^-3
+Si_bandgap=1.1 //bandgap of silicon in eV
+Const=0.0259 //constant value for kT/e in J
+
+//Calculation
+//a)
+pn0=ni^2/nn0 //in cm^-3
+pn=pn0*exp((V)/Const) 
+
+//b)
+
+Vbi=0.6949 //breakdown voltage in V
+Vp=Vbi-V //potential already present in V
+Vz=Si_bandgap-Vp //Zener breakdown voltage in V
+
+mprintf("a)\n")
+mprintf("Total concentration of holes= %.2e cm^-3\n",pn) 
+mprintf("b)\n")
+mprintf("Additional voltage required= %.4f V",Vz)
diff --git a/3636/CH5/EX5.9/Ex5_9.txt b/3636/CH5/EX5.9/Ex5_9.txt
new file mode 100644
index 000000000..be6e7448a
--- /dev/null
+++ b/3636/CH5/EX5.9/Ex5_9.txt
@@ -0,0 +1,4 @@
+ a)
+Total concentration of holes= 5.45e+11 cm^-3
+b)
+Additional voltage required= 0.9051 V 
+\ No newline at end of file