When the electrons in silicon are excited by visible light and jump

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SUMMARY

The discussion centers on the behavior of electrons in silicon when excited by visible light, particularly in the context of solar cells. It addresses the concern that if all valence electrons are excited into the conduction band, the solar cell may deplete its charge carriers. The analogy to electrochemical batteries is drawn, suggesting a similarity in electron movement and replacement mechanisms. The conversation highlights the importance of understanding electron dynamics in semiconductor materials for effective solar cell functionality.

PREREQUISITES
  • Understanding of semiconductor physics, particularly silicon behavior.
  • Knowledge of electron band theory, including conduction and valence bands.
  • Familiarity with solar cell technology and its operational principles.
  • Basic concepts of electrochemistry related to electron flow in batteries.
NEXT STEPS
  • Research the principles of semiconductor doping and its effect on electron availability.
  • Explore the mechanisms of charge carrier recombination in solar cells.
  • Learn about the photovoltaic effect and its implications for solar energy conversion.
  • Investigate the similarities and differences between solar cells and electrochemical batteries.
USEFUL FOR

Chemistry students, electrical engineers, solar energy researchers, and anyone interested in the principles of semiconductor physics and solar cell technology.

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When the electrons in silicon are excited by visible light and jump into the conduction band how do the electrons replace?

So for example, wouldn't a solar cell only last for so long if all the valence electrons are excited and converted into current. I am looking at it as if all the valence electrons will be excited and all will be left are the core electrons??

I hope that is clear

-Chemistry student
 
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Close the circuit.

It a way it is not much different from electrochemical batteries.
 

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