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+//Exa 8.3
+clc;
+clear;
+close;
+//given data :
+NA=7.5*10^24;//in atoms/m^3
+ND=1.5*10^22;//in atoms/m^3
+De=25*10^-4;//in m^2/s
+Dh=10^-3;//in m^2/s
+TAUeo=500;//in ns
+TAUho=100;//in ns
+ni=1.5*10^16;//in atoms/m^3
+VR=-10;//in Volt
+epsilon=11.6*8.854*10^-12;//in F/m
+e=1.6*10^-19;//in Coulamb
+VT=26;//in mV
+GL=10^27;//in m^-3 s^-1
+
+Le=sqrt(De*TAUeo*10^-9);//in um
+Le=Le*10^6;//in um
+Lh=sqrt(Dh*TAUho*10^-9);//in um
+Lh=Lh*10^6;//in um
+JS=e*(ni^2)*(De/(Le*10^-6*NA)+De/(Lh*10^-6*ND));//in A/cm^2
+JL=12.5;//in mA/cm^2
+VOC=VT*log(1+JL/JS);//in Volt
+disp(VOC,"Open circuit voltage in Volt : ");
+//Note : Answer in the book is wrong. \ No newline at end of file