Why are Solar Panels Called Photovoltaic Cells?
What are Photovoltaic Cells?
Photovoltaic cells, also known as solar cells, are devices that convert sunlight into electricity. They are made of semiconductor materials, such as silicon, and when sunlight strikes the cells, it causes the electrons in the material to become energized and generate an electric current.
Why are they Called Photovoltaic Cells?
The term “photovoltaic” comes from the Greek words “phos” meaning light and “voltaic” meaning electricity. Therefore, the term “photovoltaic” accurately describes the process by which these cells generate electricity from sunlight. The word “solar” is commonly used to refer to these cells as well, as they harness the energy from the sun.
How do Photovoltaic Cells Work?
When sunlight hits the photovoltaic cells, the photons from the sunlight are absorbed by the semiconducting material. This process creates an electric field across the layers of the cells, causing electricity to flow. This electricity can then be used to power electrical devices or stored in batteries for later use.
The History of Photovoltaic Cells
Photovoltaic cells were first discovered in 1839 by Edmond Becquerel, a French physicist, who observed the photovoltaic effect while experimenting with an electrolytic cell. However, it wasn’t until the 1950s that the first practical photovoltaic cell was developed, paving the way for the use of solar energy as a source of electricity.
Applications of Photovoltaic Cells
Photovoltaic cells are used in a variety of applications, from small-scale solar panels for residential use to large-scale solar farms used to generate electricity for entire cities. They can also be integrated into building materials, such as roof tiles, to provide a clean and renewable energy source.
Advantages of Photovoltaic Cells
One of the main advantages of photovoltaic cells is that they offer a clean and renewable source of energy. They produce electricity without emitting greenhouse gases, making them an environmentally friendly alternative to traditional fossil fuels. Additionally, they require minimal maintenance and have a long lifespan, making them a cost-effective energy solution in the long run.
Conclusion
In conclusion, photovoltaic cells are called such because they convert light (photons) into electricity (voltaic). As a clean and renewable energy source, they play an important role in combating climate change and reducing our reliance on fossil fuels. With advancements in technology, the use of photovoltaic cells is expected to continue to grow, powering a greener and more sustainable future.
