Applied physics

, Volume 16, Issue 4, pp 399–404

Fluorescent solar energy collectors: Operating conditions with diffuse light

  • A. Goetzberger
Contributed Papers


The fluorescent energy conversion principle using several sheets of transparent material doped with fluorescent molecules to concentrate radiation is extended to include diffuse radiation. Two cases are treated here: diffuse radiation only and a composite spectrum consisting of 40% direct and 60% diffuse radiation simulating the average illumination of a flat exposure in central Europe. In both cases photovoltaic conversion efficiency is significantly higher than with the AM1 spectrum. This is due to the blue shift and narrow shape of the diffuse spectral distributions. With realistic boundary conditions the theoretical conversion efficiency is 1.56 times higher than for the AM1 case. The highest theoretical conversion efficiency is now 38%.


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  1. 1.
    A. Goetzberger, W. Greubel: Appl. Phys.14, 123 (1977)CrossRefADSGoogle Scholar
  2. 2.
    W. H. Weber, J. Lambe: Appl. Opt.15, 2299 (1976)ADSGoogle Scholar
  3. 3.
    P. T. Landsberg, J. R. Mallinson: 11th Photovoltaic Specialists Conf. (1975) p. 241Google Scholar
  4. 4.
    J. R. Mallinson, P. T. Landsberg: Proc. R. Soc. A.355, 115 (1977)ADSGoogle Scholar
  5. 5.
    Energiequellen für Morgen, Teil II. Report issued by Bundesminister f. Forschung u. Technologie, Bonn (1977)Google Scholar
  6. 6.
    W. Wolf: Proc. IRE48, 1246 (1960)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • A. Goetzberger
    • 1
  1. 1.Institut für angewandte Festkörperphysik der Fraunhofer-GesellschaftFreiburgFed. Rep. Germany

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