Department of Physics and Astronomy, University of Denver
Raymond K. Kostuk
Department of Electrical & Computer Engineering, University of Arizona
Christine K. Luscombe
Materials Science and Engineering, University of Washington
Holographic Spectrum Splitting for Multijunction Organic Photovoltaics
Photovoltaic cells that produce electricity from sunlight only convert a small percentage of incident sunlight into electricity. One way to make them more efficient is to stack their “junctions,” the areas that do the actual work of converting sunlight to electricity, on top of one another. Junctions are sensitive to specific colors in the spectrum of visible light: some junctions are sensitive to red light; some are sensitive to blue; others are sensitive to the other colors that make up sunlight. Some solar devices with stacked junctions already exist, but they are very expensive, which means they are used mostly on orbiting satellites and other important projects.
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