Question

For an intrinsic (un-doped) semiconductor at room temperature (25 oc) with the fermi energy in the center of the 1.5 ev band gap, find the fraction of unoccupied electron states at the top of the valence band and the fraction of occupied states at the bottom of the conduction band (use fermi function). If the temperature increases to 300 oc, how will the resistance of the semiconductor change have compared with that at room temperature? Fermi function: , where ef is the fermi level. You might need another equation that has not been provided.

Answer 1

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