Hello, researchers. I hope you're all well. How can we know the type of semiconductor from the band structure (N type or P type)?
Thank you in advance.
The answer to your question could be as
In an n-type semiconductor, the donor energy level is close to the conduction band and away from the valence band. While in the p-type semiconductor, the acceptor energy level is close to the valence band and away from the conduction band.
It's important to note that the band structure alone may not provide a definitive answer in some cases, especially for complex semiconductor materials. Additional experimental measurements and analyses, such as conductivity measurements or doping profiles, may be required to confirm the type of semiconductor. Although Atiq Ur Rehman has mentioned it properly.
Dear Elaamri,
It is not easy to predict a "p" or "n" - type intrinsic semiconductor from band structure plot. For an extrinsic semiconductor you can predict whether it is p or n - type from the position of the Fermi energy level in contrast to its intrinsic condition. However, you can calculate the Seebeck coefficient of an intrinsic semiconductor and from the values of Seebeck coefficient you can predict whether the intrinsic semiconductor is p or n - type. For more details you may follow the following article:
https://iopscience.iop.org/article/10.1088/1402-4896/acc2ef/meta
Regards.
Swarup
The differentiation can be ascertained to fermi level. When we have a pure Semi- conductor at absolute zero from theoretical point of view the fermi level is at the middle in the forbidden energy band gap. On doping if the fermi level shifts towards the valence band it's a p type conductor and if fermi level shifts towards the conduction band it is an n type semiconductor.
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