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| photovoltaic cells (PV cells) | |
| Pronunciation: | fO-tO-vol-tA-ik selz |
| Definition : | These are devices that convert sunlight directly into electrical energy. A PV cell is usually made with silicon and a doping agent (an agent that gets excited by sunlight). When the sunlight strikes the PV cell, the sun's radiation is turned into an electrical signal. |
| Facts: |
Photovoltaic cells require direct sunlight to work. |