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// Chapter 3_The Semiconductor in Equilibrium
//Caption_Position of Fermi Energy level
//Ex_14//page 121
T=300 //temperature in kelvin
kT=0.0259
ni=1.5*(10^10) //intrinsic carrier concentration
Efa=3*kT //Ef-Ea=3kT
Eav=0.045
Efif=Eg/2-(Eav)-(Efa) //The position of fermi level at the maximum doping
Na=exp(Efif/kT)*ni
printf('Maximum doping is %fd per cm cube',Na)
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