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Solar Energy

Solar Energy. Solar Panels. Solar Electric or Photovoltaic (PV) Panels are used to collect energy from the sun and convert it into electricity. This is done through the Photovoltaic Effect , the basic physical process that allows a PV cell to convert sunlight to electricity.

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Solar Energy

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  1. Solar Energy

  2. Solar Panels Solar Electric or Photovoltaic (PV) Panels are used to collect energy from the sun and convert it into electricity. This is done through the Photovoltaic Effect, the basic physical process that allows a PV cell to convert sunlight to electricity.

  3. Photovoltaic Effect Sunlight is composed of photons, or particles of solar energy. These photons exist in sunlight everywhere, and the amount of energy in each photon depends on the wavelength that they exist in.

  4. Photovoltaic Effect • When photons strike a PV cell, they may be reflected, absorbed, or they may pass through. • Only those photons that are absorbed into the PV cell generate electricity. • The photons absorbed by the PV cell depend upon the wavelength of the photon, and the composition of the PV cell itself, as it is designed to absorb certain photons.

  5. Photovoltaic Effect • Once absorbed, the photon’s energy is transferred to the electron of an atom in the PV cell. • With this new energy, the electron may escape the atom and become “free.”

  6. Photovoltaic Effect • The electron will then move easily along a conductor. • The PV cell is a semiconductor device • These freed electrons become part of the current in an electrical circuit

  7. Photovoltaic Effect • The thin wires you see in solar cells and modules are conducting wires for the electrical circuit. • The PV cells have a built-in electric field to provide voltage needed to drive the current though an external load.

  8. PV Cells PV Cell PV Module PV Panel

  9. PV Cells

  10. DECK Monitoring Project • Using the DECK website, students will observe, graph, and analyze solar energy data for a chosen day. • Then, they will calculate energy produced and compare their calculations with the website.

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