![](https://nthumb.tpgimages.com/mid2_com_img/1339/9208/TOP11718782.jpg)
Solar cell. Close-up of the surface of a solar (photovoltaic) cell, which converts light into electrical energy. The cell is made from silicon (blue), a semi-conductor. Because the silicon is a semi-conductor, the energy of photons of light is enough to release electrons from the silicon. The electrons are collected through a grid of wires (white), forming an electrical current. This cell contains numerous small silicon crystals, and so is called a polycrystalline (amorphous) cell. It is less efficient than a single-crystal cell, but is far cheaper to manufacture. Solar power is an environmentally-friendly energy source and does not pollute or use up limited resources.
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Creative#:
TOP11718782
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達志影像
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RM
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須由TPG 完整授權
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