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Is there relationship between resistivity and bandgap?

  1. Nov 24, 2005 #1


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    is the material, which has a larger bandgap, more resistive:confused: ?

    thanks for answering:smile:

  2. jcsd
  3. Nov 24, 2005 #2


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    As far as I know for semiconductors, there isn't any relationship. The bandgap has to do with the atomic arrangment. The conductivity, which is the inverse of resistivity, is a function of carrier concentration and mobility. These can be altered through doping. I don't even see a relationship among intrinsic samples.
  4. Nov 24, 2005 #3


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    Your question itself is confusing.

    There is a clear connection between the two as far as the dependence of the resistivity as a function of temperature. In other words, someone with a larger bandgap will have a different temperature evolution of resistivity when compared with another material with a smaller band gap.

    One can also plot the IV characteristics and see a "gap" in the low voltage region, the size of which corresponds to the size of the band gap.

    But really, I'm not sure what exactly the question is asking for.

  5. Nov 24, 2005 #4


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    i have a clearer picture now

    thanks for answering:smile:
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