How Solar Cells Turn Light Into Energy

Solar cells convert sunlight directly into electricity using the photovoltaic effect.
When photons from sunlight hit a solar cell, they excite electrons in the material.
These freed electrons flow through a circuit, creating an electric current.
Most solar panels use silicon, a semiconductor that controls electron movement.
The cell has two layers—one rich in electrons (n-type) and one poor (p-type)—forming a junction.
The electric field at this junction directs electrons to flow in a single direction.
Each solar cell produces only a little power, so many are linked together in panels.
Inverters convert the direct current (DC) into alternating current (AC) for home use.
Efficiency depends on material quality, light intensity, and panel design.
From rooftops to spacecraft, solar cells harness chemistry and physics to power the world.