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Deposition Sciences Inc. - Difficult Coatings - LB - 8/23

PV Power Boosted by 50%

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CAMBRIDGE, Mass., Nov. 25, 2008 -- New ways of squeezing out greater efficiency from solar photovoltaic (PV) cells are emerging from computer simulations and lab tests conducted by a team of physicists and engineers at the Massachusetts Institute of Technology (MIT). Using computer modeling and a variety of advanced chip-manufacturing techniques, they have applied an antireflection coating to the front, and a novel combination of multi-layered reflective coatings and a tightly spaced array of lines, called a diffraction grating, to the backs of ultrathin silicon films to boost the cells' output by as much as 50 percent. The...Read full article

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    Published: November 2008
    Glossary
    diffraction grating
    A glass substrate carrying a layer of deposited aluminum that has been pressure-ruled with a large number of fine equidistant grooves, using a diamond edge as a tool. Light falling on such a grating is dispersed into a series of spectra on both sides of the incident beam, the angular dispersion being inversely proportional to the line spacing. By proper shaping of the diamond edge, however, the grooves can be formed in such a way as to concentrate most of the energy into a single spectral...
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    Coatingsdiffraction gratingefficient thin solar cell technologyenergygreen photonicsindustrialLionel KimerlingLirong ZengMassachusetts Institute of TechnologyMITNews & FeaturesPeter Bermelphotonicssolar efficiencyultrathin silicon films

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