Ionized dopants and quasi-fermi level

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SUMMARY

This discussion focuses on the calculation of ionized dopants in a pn junction under applied voltage conditions. It highlights the relationship between the ionization energy of dopants and the quasi-Fermi levels for holes and electrons. The key takeaway is that while equilibrium conditions allow for straightforward calculations of ionized dopants, the introduction of voltage complicates this by necessitating the consideration of two distinct quasi-Fermi levels. Understanding this relationship is crucial for accurate modeling in semiconductor physics.

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  • Understanding of pn junction theory
  • Familiarity with quasi-Fermi levels
  • Knowledge of ionization energy concepts
  • Basic principles of semiconductor physics
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Pete99
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Hello all,

I have a question regarding quasi-fermi levels that probably some one can help me to understand.

In a pn junction in equilibrium we can calculate the number of ionized dopants from the distance between the ionization energy of the dopants and the fermi level.

Now, if we apply a voltage, we can in general define two different quasi-fermi level for holes and electrons. How can we calculate the number of ionized dopants now?

Thanks for any help,
 
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