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Fluorescent quantum yields and long-term stability of silver island/polymer/dye systems, with applications to longer wavelength fluorescent solar concentrators

: Wilson, H.R.

Granqvist, C.G. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VII
Bellingham, Wash.: SPIE, 1989 (Proceedings of SPIE 1016)
ISBN: 0-8194-0051-3
European Congress on Optics (ECO) <1, 1988, Hamburg>
Fraunhofer ISE ()

With the aim of extending the spectral range of fluorescent solar concentrators to longer wavelengths, the electromagnetic interaction between the fluorescent dyes and evaporated silver island films was investigated theoretically and experimentally. Mathematical expressions and spectra for the radiative and non-radiative decay rates, true and "apparent" quantum yields and the fluorescent decay lifetimes of the silver/dye complexes are obtained in dependence on the form of the silver islands, modelled as oblate spheroids. The expected improvement in long-term stability and a suggestion for a collector incorporating these principles are presented.