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1. Given the following properties for Germanium –
Diamond cubic structure (a = 0.5658 nm;
Intrinsic carrier density at 300K (n; = 2.4 x 1013 cm-3)
Electron mobility (He = 3900 cm²/v-s)
Hole mobility (uh = 1900 cm?/v-s)
%3D
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Calculate the following -
a. The ratio of the intrinsic carrier density to the atomic density
b. The conductivity of intrinsic Ge at 300K

Given the following properties for Aluminum -
Face-centered cubic structure (a = 0.405 nm)
Electron mobility (He = 13 cm?/v•s)
Three free electrons per atom
Calculate the following -
C.
The conductivity of Aluminum
d. What is the main reason that the conductivity of aluminum is much greater than
germanium?

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