Can the efficiency of a solar cell with a single band gap reach 100%?

  • #1
yecko
Gold Member
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Homework Statement
Can the efficiency of a solar cell with a single band gap reach 100%?
Relevant Equations
hf>Wg (band gap energy)
I have tried looking up online with the photoelectric effect, it just mentioned the energy of the photon must have to equal to band-gap energy.
Yet, it didn't mention if 100% can be reached in that case, or if a single bandgap makes any effect??

https://courses.lumenlearning.com/physics/chapter/29-2-the-photoelectric-effect/
https://www.e-education.psu.edu/eme812/node/534

I will have exam tomorrow, and I would like to clarify with the concept. Thank you very much.
 
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  • #2
What does the solar spectrum look like? Is it very narrow, and centered near the band gap wavelength? Or is it very broad...?
 
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