US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY
Solar cell surface. Coloured scanning tunnelling micrograph (STM) showing atoms in a thin-film solar cell. Solar cells are manufactured from semiconductors, most commonly silicon. When light hits a solar cell the energy from photons is converted into electricity. Thin-film technology increases the efficiency and decreases the cost of photovoltaic devices. Magnification unknown.
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