Impact of crystal defects on band diagram.?

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Discussion Overview

The discussion centers on the impact of crystal defects on band diagrams, particularly in semiconductors. Participants explore how different concentrations of defects can influence electronic states and band structure.

Discussion Character

  • Exploratory, Technical explanation

Main Points Raised

  • One participant notes that crystal defects can have a significant effect on band diagrams but seeks clarification on the specific impacts.
  • Another participant explains that a dilute concentration of defects in a semiconductor may induce isolated defect electronic states within the band gap, while a higher concentration could potentially create an entirely new band.
  • A repeated point emphasizes the same idea regarding defect concentrations and their effects on electronic states.
  • Participants share links to resources for further learning about the topic, including textbooks and online materials related to semiconductor physics and computational condensed matter.

Areas of Agreement / Disagreement

There is no explicit consensus reached among participants, as the discussion includes varying levels of detail and understanding regarding the effects of crystal defects on band diagrams.

Contextual Notes

Some assumptions about the types of defects and their specific impacts on band diagrams remain unaddressed. The discussion does not resolve the complexity of how different defect types may interact with the band structure.

Who May Find This Useful

Readers interested in semiconductor physics, solid state physics, and the effects of material defects on electronic properties may find this discussion relevant.

Musa
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I was studying about Crystal defects in crystals and came to know that it has huge effect on band diagram.I don't know about their specific impact on band diagram.So what are major impacts of crystal defects on band diagram.?
 
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For example, in a semiconductor, if there is a dilute concentration of defects, they would induce isolated defect electronic states in the gap of the semiconductors. If the concentration of the defects increases they may create a whole new band.
 
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Useful nucleus said:
For example, in a semiconductor, if there is a dilute concentration of defects, they would induce isolated defect electronic states in the gap of the semiconductors. If the concentration of the defects increases they may create a whole new band.
Can you please give me a link so that i further learn about it.
 
This is typically covered in introductory solid state / semiconductor physics books such as Kittel. I'm unaware of a good online resources, but just a quick google search gave me:
https://www.ifm.liu.se/materialphys...ning-1/semiconductor-physics/SP-Le4.5-pdf.pdf

If you are into computational condensed matter, then this recent review is great:

https://www.researchgate.net/profile/Anderson_Janotti/publication/262982280_First-principles_calculations_for_point_defects_in_solids/links/5605353d08ae8e08c08afbe6.pdf
 

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