2. Solar (Peter) a. Explain and discuss the three main figures of merit for a solar cell (photovoltaic cell). b. When you make a solar cell using a semiconductor to absorb the sunlight, you must pick a suitable band gap of the semiconductor. Explain what the band gap is and explain the considerations for a good pick of band gap. What happens if the band gap is chosen too high or too low? c. Explain why tandem solar cells have a theoretical efficiency advantage over single- junction cells.

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