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A wavelength shifter is a photofluorescent material that absorbs higher frequency photons and emits lower frequency photons. In most cases, the material absorbs one photon, and emits multiple lower-energy photons.
Additional recommended knowledge
These materials can be used to increase the efficiency of a photovoltaic cell (solar cell) by changing one "too-high" energy photon into multiple "just-right" energy photons.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Wavelength_shifter". A list of authors is available in Wikipedia.|