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Technician holding a polycrystalline solar cell

Technician holding a polycrystalline solar cell

T155/0056

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Credit

TOMMASO GUICCIARDINI / SCIENCE PHOTO LIBRARY TOMMASO GUICCIARDINI / SCIENCE PHOTO LIBRARY

Caption

Technician holding a polycrystalline silicon solar cell. The first silicon photovoltaic solar cells (seen in the background) were made by single crystals of silicon. They are characterised by a relatively high efficiency, up to 35%, but at the same time are very expensive to manufacture. Polycrystalline cells, also known as amorphous silicon cells, are made by very small silicon crystals. They are less efficient (up to 15%) but much cheaper to produce.

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Model release not required. Property release not required.

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