A solar cell is an electronic device that converts sunlight into electricity.
a. Principle of Solar Cell:
- A solar cell is an electronic device that converts sunlight into electricity. It is based on the photovoltaic effect, which is the generation of electric current when light falls on a semiconductor material.
- The semiconductor material used in solar cells is typically made of silicon or other similar materials.
- When photons of sunlight hit the semiconductor material, they excite the electrons and create electron-hole pairs.
- The electrons and holes are then separated by the electric field within the solar cell, creating a flow of current.
b. Applications of Solar Cell:
- Solar cells have many applications in both residential and commercial settings.
- They are commonly used to power homes, businesses, and other buildings. Solar panels can be installed on rooftops, walls, or in large solar farms.
- Solar cells are also used to power small electronic devices such as calculators, watches, and traffic signals.
- In addition, solar cells have been used to power satellites and other spacecraft, as they can generate electricity even in the absence of power source.