• These solar cells operate using a process called radiative cooling. • They emit heat as infrared light during the night, similar to how the Earth cools by radiating heat into space.
• Unlike conventional solar cells that absorb sunlight, these cells work in reverse. • They produce power by radiating heat back into the cold night sky.
• The cells use a diode to create a one- way electron traffic signal. • The diode is made of mercury cadmium telluride (MCT), which absorbs mid- and long-range infrared light.
• The prototype generates a small amount of power. • It’s unlikely to be a standalone renewable energy source but can complement existing photovoltaic technology.
• Researchers estimate that this technology could ultimately produce about 1/10th of the power generated by a solar cell.
• While the current output is low, there’s potential for significant development in the future. • Combining it with traditional solar cells could enhance overall energy production.