Physics
Photovoltaic Cell Efficiency
Quick fact
The best commercial solar cells have an efficiency of about 20–25%, but experimental models have reached over 40%.
Why this is interesting
Did you know that only a fraction of sunlight is converted into electricity by solar panels? Why does this happen, and can we make it better?
Read the full explanation
Understanding Photovoltaic Cell Efficiency
A photovoltaic cell is a device that uses sunlight to generate electricity. When light hits the cell, electrons are excited and move through the material, creating an electric current. Efficiency refers to how well this process works—how much energy is actually captured compared to the total sunlight received.
A deeper explanation
Photovoltaic cell efficiency depends on factors like the type of semiconductor materials used, the design of the cell, and how effectively it absorbs light across different wavelengths. Higher efficiency means more electricity is produced per unit of sunlight, making solar power a more viable solution for clean energy.