What is energy transformation that takes place in a solar cell?

In a solar cell, energy transformation takes place through the following process:
1. Light Energy to Electrical Energy
• Solar cells convert solar (light) energy into electrical energy through the photoelectric effect.
• When sunlight (composed of photons) strikes the surface of the solar cell, the photons are absorbed by the semiconductor material (typically silicon).
2. Excitation of Electrons
• The absorbed photons provide energy to the electrons in the semiconductor, exciting them from the valence band to the conduction band, thereby generating free electron-hole pairs.
3. Creation of Electric Current
• The electric field in the solar cell (created by the p-n junction) separates the free electrons and holes.
• The electrons move towards the n-type material and the holes towards the p-type material, creating a current.
4. Electrical Power
• This flow of electrons through an external circuit creates an electric current, which can be used to power electrical devices.
Final Energy Transformation:
• Light energy (from the sun) is transformed into electrical energy (in the form of current).
Thus, the primary energy transformation in a solar cell is from solar (light) energy to electrical energy.