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Hamamatsu Corp. - Earth Innovations LB 2/24

Food Waste Transformed into LEDs

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SALT LAKE CITY, Oct. 14, 2015 — LEDs made from sugary drinks could reduce waste and replace other light sources made with toxic elements. A process for turning food, beverages and even combustion exhaust into light-emitting quantum dots (QDs), which are subsequently integrated into LEDs, has been developed by researchers at the University of Utah. The luminescence of carbon dots can be seen when irradiated with UV light. Courtesy of Prashant Sarswat. Many types of QD are based on rare earth materials, making them expensive to synthesize and potentially harmful to dispose of. QDs derived from waste, on the...Read full article

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    Published: October 2015
    Glossary
    quantum dots
    A quantum dot is a nanoscale semiconductor structure, typically composed of materials like cadmium selenide or indium arsenide, that exhibits unique quantum mechanical properties. These properties arise from the confinement of electrons within the dot, leading to discrete energy levels, or "quantization" of energy, similar to the behavior of individual atoms or molecules. Quantum dots have a size on the order of a few nanometers and can emit or absorb photons (light) with precise wavelengths,...
    Research & TechnologyAmericasUtahUniversity of UtahMichael FreePrashant SarswatLEDsLight SourcesMaterialsquantum dotsqdscarbon dots

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