Current limitation through multijunction solar cell

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SUMMARY

The discussion centers on the operational principles of multijunction solar cells, specifically the necessity for equal photo-generated current across the series-connected layers to maintain efficiency. This requirement is grounded in Kirchhoff's Current Law (KCL), which dictates that the current through each layer must be identical. The conversation highlights a common misunderstanding regarding the adjustment of current in these systems, clarifying that no separate adjustments can be made.

PREREQUISITES
  • Understanding of multijunction solar cell architecture
  • Familiarity with Kirchhoff's Current Law (KCL)
  • Basic knowledge of photovoltaic principles
  • Introductory electronics concepts
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  • Learn about current matching techniques in photovoltaic systems
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Researchers, engineers, and students in the fields of renewable energy, solar technology, and electrical engineering will benefit from this discussion.

hamochi
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Hi, I've been reading up on multijunction solar cells and found out that since the different layers are connected in series the photo generated current through them must be adjusted so it is the same for each layer to conserve efficiency.

Why is that?
thanks.
 
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Hmm, nobody else has responded yet.

I'm not quite sure what you are asking. If the layers are connected in series, they must have the same current. That is simply KCL from introductory electronics, there is no separate "adjusting" you can do on the current.

Can you post a link or quote the source that led you to ask this question?

p.s. Welcome to Physics Forums :smile:
 

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