Is there relationship between resistivity and bandgap?

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SUMMARY

The discussion clarifies that there is no direct relationship between bandgap size and resistivity in semiconductors. Instead, resistivity is influenced by carrier concentration and mobility, which can be modified through doping. However, the temperature dependence of resistivity does vary with bandgap size, indicating that materials with larger bandgaps exhibit different resistivity behaviors at varying temperatures. Additionally, IV characteristics can illustrate this relationship, showing a "gap" in the low voltage region that correlates with the bandgap size.

PREREQUISITES
  • Understanding of semiconductor physics
  • Knowledge of carrier concentration and mobility
  • Familiarity with doping techniques in semiconductors
  • Basic concepts of IV characteristics and temperature dependence
NEXT STEPS
  • Research the temperature dependence of resistivity in semiconductors
  • Explore the effects of doping on carrier concentration and mobility
  • Learn about IV characteristics and their significance in semiconductor analysis
  • Investigate the relationship between bandgap size and thermal properties of materials
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Students and professionals in materials science, semiconductor physics researchers, and engineers involved in electronic device design and optimization.

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

thanks for answering:smile:

kit
 
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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.
 
Kit said:
is the material, which has a larger bandgap, more resistive:confused: ?
thanks for answering:smile:
kit

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.

Zz.
 
i have a clearer picture now

thanks for answering:smile:
 

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