Scientist at the University of California – Davis is developing a solar cell that can work at night. The special design solar cell is said to be able to generate up to 50 watts of power per square meter in ideal conditions.
In regular solar cells, power is generated by absorbing sunlight, which creates voltage and current flow. The new solar cell works in reverse, light is emitted and the current and voltage flow in the opposite direction, however, it’s still generating power. According to the scientist, the new cells can work during the day but you would have to block direct sunlight or point it away from the sun.
This breakthrough could be the stepping stone for grid systems to be able to run day and night on solar power.