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Lec06 DOS _ Fermi Statistics

Lec06 DOS _ Fermi Statistics - EECS 320 Density Of States...

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EECS 320 Density Of States
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Electronic states Start with a piece of semiconductor material How would you define the number of electron states?
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Electronic states Electron states distributed in energy Semiconductor Valence band filled with electrons Core electrons valence electrons Conduction band E vac Energy Bandgap Electron states are not uniformly distributed in energy We are primarily concerned with states near E C and E V
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States In Conduction/Valence Band Recall Conduction and Valence Band Define electron states in conduction band E E C No states in the bandgap E V Define “hole” states in valence band Number of states Unit volume x Unit energy Density Of States = (Note we have 4-D, 3-D in space + energy)
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