On the Conversion of Solar Radiation with Fluorescent Planar Concentrators (FPCs)

  • A. Zastrow
  • K. Heidler
  • R. E. Sah
  • V. Wittwer
  • A. Goetzberger


Though experimental results obtained with FPCs in the visible region are encouraging, the utilization of the near infrared region of the solar spectrum is still involving great problems due to low fluorescence quantum yields of dyes, strongly overlapping bands and bad stability. Our investigation of 30 infrared laser dyes (Eastman, Lambda Physik) shows, that quantum yields decrease statistically with increasing wavelength and that they depend strongly on solvent viscosity and temperature in several cases. The suppression of radiation-less processes by deuteration of NH2-groups in oxazine dyes enhances quantum yields substantially.

Efficiency, concentration ratio and stability of collectors absorbing in the visible region could be improved.


Quantum Yield Fluorescence Quantum Yield Solar Spectrum Internal Conversion Nile Blue 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1).
    W.H. Weber, J. Lambe, Appl. Opt. 15, 2299 (1976)CrossRefGoogle Scholar
  2. 2).
    A. Goetzberger, W. Greubel, Appl. Phys. 14, 123 (1977)CrossRefGoogle Scholar
  3. 3).
    N.C. Boling, C.F. Rapp, Rec. 13th IEEE Photovolt. Spec. Conf. 690 (1978)Google Scholar
  4. 4).
    A. Goetzberger, O. Schirmer, Appl. Phys. 19, 53 (1979)CrossRefGoogle Scholar
  5. 5).
    A. Goetzberger, K. Heidler, V. Wit tuer, A. Zastrow, G. Baur, E. Sah, Proc. 2nd E. C. Photovolt. Solar Energy Conf. 515 (1979)Google Scholar
  6. 6).
    A. Goetzberger, V. Wittwer, Adv. Sol. State Phys. XIX, 427 (1979)Google Scholar
  7. 7).
    J.A. Levitt, W.H. Weber, Appl. Opt. 16, 2684 (1979)CrossRefGoogle Scholar
  8. 8).
    J.S. Batchelder, A.H. Zewail, T. Cole, Appl. Opt. 18, 3090 (1979)CrossRefGoogle Scholar
  9. 9).
    V. Wittwer, K. Heidler, A. Zastrow, A. Goetzberger, Rec. 14th IEEE Photovolt. Spec. Conf. 760 (1980)Google Scholar
  10. 10).
    K.W. Böer, Phys. Stat. Sol. A, 40, 355 (1977)CrossRefGoogle Scholar
  11. 11).
    K.H. Drexhage, in F.P. Schäfer, Dye Lasers (Springer, 1973)Google Scholar
  12. 12).
    W. Siebrand, D.F. Williams, J. Chem. Phys. 49, 1860 (1968)CrossRefGoogle Scholar
  13. 13).
    B.R. Henry, W. Siebrand, in J.B. Birks, Organic Molecular Photophysics I (Wiley, 1973)Google Scholar
  14. 14).
    J.B. Birks, Photophysics of Aromatic Molecules (Wiley, 1970)Google Scholar

Copyright information

© ECSC, EEC, EAEC, Brussels and Luxembourg 1981

Authors and Affiliations

  • A. Zastrow
    • 1
  • K. Heidler
    • 1
  • R. E. Sah
    • 1
  • V. Wittwer
    • 1
  • A. Goetzberger
    • 1
  1. 1.Fraunhofer-Institut für Angewandte FestkörperphysikFreiburgW.-Germany

Personalised recommendations