Solar Cells

Solar cells are made from materials that have the property known as being photovoltaic. Photovoltaic materials produce electrical current as a result of being hit by photons. The process converts light energy into electrical energy that can then be used to power electronic devices.

The Three Laws of Photovoltaics:

In order for a material to be classified as photovoltaic it must obey the following rules:
  1. The absorption of light, generating either electron-hole pairs or excitons.
  2. The separation of charge carriers of opposite types.
  3. The separate extraction of those carriers to an external circuit.

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