Why Does the Photoelectric Effect Eject Electrons from the Innermost Shell?

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SUMMARY

The photoelectric effect primarily involves the emission of electrons from the conduction band, specifically the valence band, rather than from atomic shells. In solids, the electronic band structure dictates that electrons are ejected from the top of the conduction band, not from distinct shells as seen in isolated atoms. This distinction is crucial for understanding the behavior of electrons in solid materials during the photoelectric effect.

PREREQUISITES
  • Understanding of electronic band structure in solids
  • Familiarity with the concepts of conduction and valence bands
  • Knowledge of the photoelectric effect principles
  • Basic concepts of solid-state physics
NEXT STEPS
  • Research the differences between atomic and solid-state electron behavior
  • Study the principles of electronic band theory
  • Explore the implications of the photoelectric effect in semiconductor physics
  • Learn about experimental techniques for measuring photoelectrons in solids
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Physics students, materials scientists, and researchers interested in solid-state physics and the photoelectric effect will benefit from this discussion.

eitan
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In the photoelectric effect, the electron is emitted from the innermost shell. Why not from the outer shells?

Thank you
 
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That is not true 100% since photoelectric effect is for solids, and solid elements have different energy level structure, we don't talk about 'shells' there...
 
eitan said:
In the photoelectric effect, the electron is emitted from the innermost shell. Why not from the outer shells?

Thank you

As malawi_glenn has said, you have read something incorrectly (this is why we often ask for the full citation of your sources). The standard photoelectric effects produces photoelectrons that came from the top of the conduction band, which is the "valence" band of the electronic band structure. There are no "shells". A solid does not have the same behavior as the individual atoms/molecules that make up the solid.

Zz.
 

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