Hey all, I have two questions.(adsbygoogle = window.adsbygoogle || []).push({});

1) The density of electron energy states is given by g(E) = A sqrt E.

Evaluate how many quantum states there are with energies between 9.0eV and 9.1eV. Ansewr in terms of the quantity A.

2) Consider an intrinisic semiconductor. Let Nv and Nc be the number of electrons in the valence band and conduction abnds respectively. Let N = Nv + Nc. since the widths of energy levels in an energy band are small compared to the energy gap Eg, it is reasonable to assume that all the levels in an energy band have the same energy. Take energies of all levels in the valence badn to be 0 and energies of all levels in the conduction band to be Eg. Using Fermi-Dirac statistics, show that the Fermi energy level lies midway in the middle of energy gap Eg.

Sorry I am clueless as to how to approach both questions.. hope to get some help as to how to start. Thank you!

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# Fermi-Dirac Distribution Function

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