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More Semiconductor Physics -- Doping

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[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
    -- transparency from Ashcroft and Mermin "Solid State Physics" showing antimony-doped germanium
    Donor Concentration Resistivity
    (micropercent) (ohm-cm)
    5 10^9
    50 10^5
    150 10
    300 0.1

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    "http://www.physics.udel.edu/~watson/scen103/clas1112.html"
    Last updated Nov. 12, 1996.
    Copyright George Watson, Univ. of Delaware, 1996.