A solar cell is a device that directly converts the energy of light into electrical energy through the photovoltaic effect. Solar cells or photovoltaic cells are made based on the principle of the photovoltaic effect. They convert sunlight into direct current (DC) electricity. But, a single photovoltaic cell does not produce enough amount of electricity.
Silicon crystals are laminated into p-type and n-type layers, stacked on top of each other. Light striking the crystals induces the “photovoltaic effect,” which generates electricity.
How do solar cells work?
A solar cell is a sandwich of n-type silicon and p-type silicon. It generates electricity by using sunlight to make electrons hop across the junction between the different flavours of silicon:
- When sunlight shines on the cell, photons (light particles) bombard the upper surface.
- The photons (yellow blobs) carry their energy down through the cell.
- The photons give up their energy to electrons (green blobs) in the lower, p-type layer.
- The electrons use this energy to jump across the barrier into the upper, n-type layer and escape out into the circuit.
- Flowing around the circuit, the electrons make the lamp light up.
Advantages of solar cell
- Solar cells provide Economy-friendly energy
- Solar cells provide a great opportunity to create savings on your electric bill
- The most important thing is that solar energy is a truly renewable energy source.
- Maintenance cost is too less.