Biomimetic Dye Aggregate Solar Cells by Peter L. Marek

By Peter L. Marek

This thesis describes a brand new method of the development of solar cells. Following nature's instance, this strategy has the objective to discover a biomimetic self-assembling dye, whose aggregates can mimic the normal light-harvesting process of certain photosynthetic lively micro organism. The thesis investigates how you can keep an eye on the self-assembly such that appropriate dye aggregates are shaped with excessive inner order and size-confinement. The dye aggregates may be applied right into a new kind of solar cells, designed to mix some great benefits of hybrid sun cells and solid-state dye-sensitized sunlight cells (ss-DSSCs): dye mixture sunlight cells (DASCs). This booklet describes the development and primary assessments of a prototype for DASCs at the foundation of the investigated dye aggregates. The defined method has the virtue that it'll let to accumulate a light-harvesting process totally synthetically in huge scale with a purpose to become aware of reasonably cheap, lightweight and environmentally pleasant sunlight cells - a beneficial target in the direction of the exploitation of unpolluted strength from sunlight.

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Both shifts may occur also simultaneously, as the molecules couple to several others within three dimensional aggregates. As amorphous aggregates do not have a defined structure their absorption spectrum does not show any characteristic shift, but is simply broadened. Absorption spectra of isolated monomers within perfect solutions may also be shifted slightly depending on the polarity of the solvent molecules. Thereby the whole spectrum is shifted in contrast to the case of well defined aggregates where the shift is band-specific [32].

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The finding of two similar bands in the fit (Fig. 6b, magenta) proves the quality of the fitting algorithm and shows that also a not shifted Soret band remains within the aggregates, which is broader than that of the monomeric Soret bands. This broadened not red-shifted Soret band within J-aggregates has also been found in the fit of the absorbance of the separated J-aggregate fraction (deposits on the cuvette walls) (Fig. 6c), where the monomeric Soret band residue (magenta) vanished almost completely.

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