Self-absorption and luminescence quantum yields of dye-zeolite L composites

Devaux, André ; Calzaferri, Gion ; Miletto, Ivana ; Cao, Pengpeng ; Belser, Peter ; Brühwiler, Dominik ; Khorev, Oleg ; Häner, Robert ; Kunzmann, Andreas

In: The Journal of Physical Chemistry C, 2013, vol. 117, no. 44, p. 23034–23047

Electronic absorption and fluorescence spectra based on transmission measurements of thin layers obtained from new perylene–zeolite L composites and new dye1,dye2–zeolite L sandwich composites, the latter acting as antenna systems, have been investigated and analyzed. The influence of extra- and intraparticle self-absorption on the spectral shape and fluorescence quantum yield is discussed in... Plus

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    Summary
    Electronic absorption and fluorescence spectra based on transmission measurements of thin layers obtained from new perylene–zeolite L composites and new dye1,dye2–zeolite L sandwich composites, the latter acting as antenna systems, have been investigated and analyzed. The influence of extra- and intraparticle self-absorption on the spectral shape and fluorescence quantum yield is discussed in detail. Due to its intraparticle origin, self-absorption and re-emission can often not be avoided in organized systems such as dye–zeolite L composites where a high density of chromophores is a prerequisite for obtaining the desired photophysical properties. We show, however, that it can be avoided or at least minimized by preparing dye1,dye2–zeolite L sandwich composites where donors are present in a much larger amount than the acceptors because they act as antenna systems.