Solar cell

Solar cell

T155/0109 Rights Managed

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Credit: MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY

Caption: Solar cell (image 2 of 3). Computer illustration of a solar cell charging in sunlight. Solar cells convert sunlight into electricity. This cell consists of 2 layers of silicon (Si, upper & lower left). The top layer also contains phosphorous (P) atoms. Atoms are seen as purple spheres. P normally holds 5 outer electrons (e-, blue), while Si holds 4. Sunlight on the top layer releases e- whose places around the P atom are taken by e- from the bottom layer. The e- build-up in the top layer can be discharged as an electric current. For the solar cell's structure & for it discharg- ing see images T155/108 and T155/110 respectively.

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Keywords: art, artwork, charging, circuit, electron, energy, industry, light, light bulb, photovoltaic, photovoltaic cell, silicon, solar cell, technology

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