Grade 12Physical Chemistry
Althouugh Si is insulator then how does it behave as semiconductor upto heating
1 Answer
Arun
On heating, the electrons gain energy and hence the bonds break and the number of free electrons increases. Thus, increasing the conductivity. This formula supports the answer,
σ = ne2/(mτ)where, σ = conductivity
n = number density of free electrons
e = charge in electron
m = mass of electron
τ (tau) = relaxation time
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