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Printing Flexible, Foldable Arrays of Solar Cells
New MIT-developed materials make it possible to produce photovoltaic cells on paper or fabric. The technique represents a major departure from the systems used until now to create most solar cells, which require exposing the substrates to potentially damaging conditions, either in the form of liquids or high temperatures. The new printing process uses vapors, not liquids, and temperatures less than 120 degrees Celsius. These ?gentle? conditions make it possible to use ordinary untreated paper, cloth, or plastic as the substrate on which the solar cells can be printed.

In this video, a paper solar cell circuit is dynamically folded and unfolded while the voltage is simultaneously measured on the meter. The paper photovoltaic is illuminated from below with simulated solar illumination.
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