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JEEMAIN and NEET
>>
Physics
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Class12
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Semiconductor Materials and Electronic Devices
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Q)
Estimate the conductivity (
σ
i
) and resistivity (
ρ
i
) of silicon atoms and electron-hole pairs at room temperature of
300
∘
K
if every 10-millionth silicon atom is replaced by an atom of Indium.
Note: Concentration of atoms by Avogadro's Law,
n
A
=
5
×
10
28
atoms
m
−
3
, Intrinsic concentration at room temperature is
1.5
×
10
16
electron-hole pairs
m
−
3
, Electron Mobility =
0.135
m
2
/
V
.
s
and Hole Mobility =
0.048
m
2
/
V
.
s
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