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Breakthrough for Hybrid Solar Cells

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FREIBURG, Germany, Feb. 19, 2010 – A method for treating the surface of nanoparticles has enabled researchers to attain an efficiency rate of 2 percent by using so-called quantum dots composed of cadmium selenide. The method was developed by Albert-Ludwigs-Universität Freiburg scientists at the Department of Microsystems Engineering (IMTEK) and the Freiburg Materials Research Center (FMF). These measurements, well above the previous efficiency ratings of 1 to 1.8 percent, were confirmed by the ‘Dye and Organic Solar Cells’ research group of the Fraunhofer Institute for Solar Energy Systems at the FMF. ...Read full article

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    Published: February 2010
    Glossary
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    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,...
    Albert-Ludwigs-Universität FreiburgBasic Sciencecadmium selenideDepartment of Microsystems EngineeringDr. Gerald UrbanDr. Michael KrügerDye and Organic Solar CellsenergyFraunhofer Institute for Solar Energy SystemsFreiburg Materials Research CenterGerman Federal Ministry of Education and ResearchGermanygreen photonicsHybrid Solar CellsImtekMicro Energy Harvestingnanonanoparticlesorganic solar cellsphotovoltaicsQuantum Dot Polymer Hybrids as Photoactive Material in Solar Cellsquantum dotsResearch & TechnologySensors & Detectors

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