513.001 Molecular and Solid State Physics

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Physical
Constants

Periodic System
of Elements

      

Semiconductor conductivity

An intrinsic semiconductor shows the following values for the specific resistivity:
at 145°C ρ = 1 Ω cm,
at 710°C ρ = 3×10-3 Ω cm.

The temperature dependence of the resistivity is mostly determined by the temperature dependence of the carrier density.

The effective densities of states Nc and Nc depend weakly on temperature. If you neglect this temperature dependence and assume that the mobilities of the electrons and holes are temperature independent, then you can estimate the band gap of the semiconductor. What is the band gap in this case?