Solar cells

Solid state device that converts artificial or natural light directly into electric current. Also called photovoltaic cell.

• It is based on the photovoltaic effect.
• One of the semiconductors regions is made so thin the light incident on it reaches the P-N junction and gets absorbed.
• It converts solar energy into electrical energy.
• Silicon is what is known as a semi-conductor, meaning that it shares some of the properties of metals and some of those of an electrical insulator, making it a key ingredient in solar cells.
• Solar cells, sometimes called photovoltaic cells, convert energy from the sun directly into electricity.
• Solar cells are very useful in powering space vehicles such as satellites and telescopes (e.g. Hubble). They provide a very economical and reliable way of powering objects which would otherwise need expensive and cumbersome fuel sources.

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