What is the maximum theoretical efficiency limit for a single-junction solar cell under standard conditions, and which principle sets this limit?

What is the maximum theoretical efficiency limit for a single-junction solar cell under standard conditions, and which principle sets this limit?

• A. The Carnot limit for heat engines.
• B. The Davies limit for multi-junction cells.
• C. The Shockley-Queisser limit; roughly 33–34% for a single-junction cell under standard conditions.
• D. The Edison limit for photovoltaic devices.

Answer: (C)