What is the efficiency range of silicon-based photovoltaic cells?

• A. 5-10%
• B. 18-22%
• C. 25-30%
• D. 30-40%

Answer: (B)

Efficiency measures how much of the sun’s energy a photovoltaic cell can convert into electrical power. Silicon-based cells, which are the most common type in solar panels, typically operate in the 18-22% efficiency range in real-world, commercial use. This takes into account the various losses that occur inside the cell, such as imperfect light absorption, carrier recombination, and resistance. While high-quality silicon cells developed in labs can reach somewhat higher values in ideal conditions, and other technologies with different cell designs can exceed 30%, everyday silicon-based cells used in modules are generally around 18-22%. So the 18-22% range best reflects common, practical silicon-based photovoltaic performance.