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More Semiconductor Physics -- Doping

[Bands for metal, insulator, and semiconductor]

[schematic of pure Si lattice]

[schematic of Si doped with As]

[Donor and acceptor levels]

[schematic of Si doped with Ga]

  • Review effects of doping on resistivity of semiconductor
    -- figure from Ashcroft and Mermin "Solid State Physics" showing antimony-doped germanium

    Donor Concentration Resistivity
    (micropercent) (ohm-cm)
    5 109
    50 105
    150 10
    300 0.1


    Comments, suggestions, or requests to ghw@udel.edu.
    "http://www.physics.udel.edu/~watson/scen103/99s/clas0427.html"
    Last updated April 27, 1999.
    Copyright George Watson, Univ. of Delaware, 1999.