initial commit / add all books

1 files changed, 36 insertions, 0 deletions

diff --git a/2594/CH5/EX5.21/Ex5_21.sce b/2594/CH5/EX5.21/Ex5_21.sce
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+clc

+Vbi=1.2

+disp("Vbi = "+string(Vbi)+"/cm^3") //initializing value of built in voltage.

+no=1.8*10^6

+disp("no = "+string(no)+"cm^-3") //initializing value of intrinsic concentration.

+Vt=0.0259

+disp("Vt = "+string(Vt)+" eV") //initializing value of thermal voltage.

+Er=13.1

+disp("Er = "+string(Er)) //initializing value of relative dielectric permittivity constant .

+Eo=8.854*10^-14

+disp("Eo = "+string(Eo)+" F/cm") //initializing value of permittivity of free space.

+e=1.6*10^-19

+disp("e = "+string(e)+" columbs") //initializing value of charge of electrons.

+E=Eo*Er

+disp("total permittivity,E=Eo*Er="+string(E)+" F/cm")//calculation.

+NaNd=((no^2)*(exp(Vbi/Vt)))

+disp("(a)NaNd=((no^2)*(exp(Vbi/Vt)))="+string(NaNd)+" /cm^6")//calculation.

+Na=(sqrt(NaNd/(4)))

+disp("Na=(sqrt(NaNd/(4)))="+string(Na)+" /cm^3")//calculation.

+Nd=4*Na

+disp("(b)Nd=4*Na="+string(Nd)+" /cm^3")//calculation.

+W=sqrt((2*E*Vbi/e)*((Nd+Na)/(Na*Nd)))

+disp("(c)W=sqrt((2*E*Vbi/e)*((Nd+Na)/(Na*Nd))))="+string(W)+" cm")//calculation.

+xn=0.2*W

+disp("(d)xn=0.2*W="+string(xn)+" cm")//calculation.

+xp=0.8*W

+disp("xp=0.8*W="+string(xp)+" cm")//calculation.

+Emax=(-e*Nd*xn)/E

+disp("(e)Emax=(-e*Nd*xn)/E)="+string(Emax)+"V/cm")//calculation.

+//The value of Na after calculation is provided wrong in the book.Due to which value of W,xn,xp and Emax differ ,than the answer provided in the book.

+

+

+

+

+

+