Photoelectric effect and bound electrons

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The discussion centers on the photoelectric effect, specifically why incoming photons interact primarily with bound electrons. It is noted that electrons require a certain work function to be freed, influenced by positive charge induction in conductors. In contrast, insulators have electrons that are not free to escape due to their bound state. Clarification is sought regarding the term "bound electrons," as the photoelectric effect typically involves electrons from the conduction band, which are not bound to individual atoms. Understanding these distinctions is crucial for grasping the mechanics of the photoelectric effect.
usman1984
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Hi. My question is why in photoelectric effect in coming photon interacts with bound electrons only?
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The way I understand it, the electron will always have some work function/energy required to free it because, e.g. in the case of conductors, a positive charge gets induced around the electron trying to pull it back when it tries to escape the surface. Meanwhile, for the case of insulators, the electrons are not free.
 
Thanks Charles
 
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What do you mean by "bound electrons"?
The photoelectric effect in a metal ejects electrons from the conduction band. These electrons are not "bound" to any atom.
Maybe you could explain in more detail what do you mean with your question.
 
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