P
PZ
there is such an equation pn = ni^2 exp(Va/Vt) in junction given in
textbook. I am wondering how true it is against other equations.
suppose Va is zero,
pn = ni^2 exp(Va/Vt) => pn = ni^2
at same time p is p(0)= Ni^2/Nd, and n(0) = Ni^2/Na,
so p(0) x n(0) = Ni^4/NaNd, and is supposed to equal ni^2, that would
lead
Ni^4/NaNd = Ni^2 => NaNd = Ni^2.
But this Na and Nd, they are the dopant of p and n junction, their
product doesn't equal to Ni^2.
Any idea where is wrong?
thanks
textbook. I am wondering how true it is against other equations.
suppose Va is zero,
pn = ni^2 exp(Va/Vt) => pn = ni^2
at same time p is p(0)= Ni^2/Nd, and n(0) = Ni^2/Na,
so p(0) x n(0) = Ni^4/NaNd, and is supposed to equal ni^2, that would
lead
Ni^4/NaNd = Ni^2 => NaNd = Ni^2.
But this Na and Nd, they are the dopant of p and n junction, their
product doesn't equal to Ni^2.
Any idea where is wrong?
thanks