Clearly explain why the maximum efficiency of a solar cell is only ~33%. What ar

Question

Clearly explain why the maximum efficiency of a solar cell is only ~33%. What are the losses? Why can we not have 100% fill factor (even after ignoring all resistive losses)? Calculate the short circuit current and open circuit voltage in a GaAs solar cell which is subjected to a monochromatic light of620 nm Assume an absorption coefficient a = 1E4/cm; the absorbed photon flux is [1-exp(-at)). The thickness t of GaAs is 2 micrometers; reflection losses are 10%; 10% of the generated current is lost because of recombination. The power in the monochromatic beam is 100 mW/cm^2. The diode Jo is IE-19 A/cm^2.

Explanation / Answer

A)

the maximum efficiency of solar cell is only 33% because

Thus only 33% of the sun's energy is theoretically converted to electricity.

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