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How does changing the distance from a light source affect the power output of Photovoltaic Cells?
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- Words:
- 4191
- Submitted:
- Fri Oct 31 2003
... AS Physics Coursework assignment How does changing the distance from a light source affect the power output of Photovoltaic Cells? By Scott Humm How photovoltaic cells work The energy a photovoltaic cell uses comes from the sun. In the sun hydrogen nuclei fuse with each other and form helium nuclei and energy. It takes four hydrogen nuclei to form one helium nucleus. Photons are the energy by-products of the nuclear reactions in the sun. I intend to simulate this effect of the sun on the panel by having a powerful bulb close to the panel I am using. Photovoltaic cells are made of semiconductors. Silicon is the most frequently used semiconductor. When light hits the cell, a certain amount of it is absorbed into the semiconductor material and this absorbed energy is transferred into semiconductor. The absorbed energy knocks off electrons and they have the ability to flow freely. Electric fields in the Photovoltaic cell
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