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 (2013). Self-Absorption and Luminescence Quantum Yields of Dye-Zeolite L Composites. Journal of physical chemistry. C, 117(44), pp. 23034-23047. Washington, D.C.: American Chemical Society 10.1021/jp408556g

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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.

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