Question 2: Germanium is doped with acceptor These acceptors have an impurity level at EA/E/5. At the temperature of interest Eg=20kT and E=5kT. Find the ration of electron density/hole density (n/p)?
Question 2: Germanium is doped with acceptor These acceptors have an impurity level at EA/E/5. At the temperature of interest Eg=20kT and E=5kT. Find the ration of electron density/hole density (n/p)?
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Transcribed Image Text:Question 2: Germanium is doped with acceptor These acceptors have an impurity level at
EA/Eg/5. At the temperature of interest Eg=20kT and Er=5kT. Find the ration of electron
density/hole density (n/p)?
=9.11 10-31 kg
=1.381 10-23 J/K
=6.626 10-34 Js
(2tkgT\7
= 2
mo
E
kB
(m,'m,)š exp(-2kI
h?
2kgT,
h
(2tm.*kgT\7
exp
Eg – Ep
kgT
e
=1.602 10-19 C
8,
n = 2
=1.602 10-19 J
=0.12 mọ
1ev
h2
me (Ge)
m, (Ge)
NA
E(Ge)
M(Ge)
(2tm,*kgT\7
h2
EF
=0.37 mo
p = 2
exp
kRT.
=6.022 1023 atom/mole
=0.67 eV
=72.64 gr/mol
P(Sb)
P(Ge)
=6.7 g/cm³
=5.46 g/cm³
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