KEYWORDS: Polymers, Dye sensitized solar cells, Solar cells, Atrial fibrillation, Energy harvesting, Organic photovoltaics, Solar energy, Thermoelectric materials, Semiconductors, Nanocomposites
Energy harvesting and storage systems (EHSS) for future AF vehicles are reviewed with emphasis on thermoelectics,
organic materials, specifically, dye-sensitized solar cells and polymer batteries. The organic solar cells include solid-state
organic solar cells and dye-sensitized solar cells (DSSC). The advantages of using such organic EHSS for AF vehicles
are their specific performance, its scalability to larger skin area and low-temperature processing route, thus cost-effective
however, there are several technical challenges preventing us to develop the organic EHSS in a speedy way.
Phthalocyanine dyes are well known for their intense absorption in the red and near-IR regions. We synthesized novel
phthalocyanines for dye-sensitized solar cell (DSSC). Those dyes can absorb in the red and near-IR regions and adsorb
onto the surface of TiO2. Using such phthalocyanines as working electrode with TiO2, DSSCs were assembled and its
photocurrent-voltage and IPCE characteristics have been studied and compared. Light energy conversion efficiency of
DSSCs depended on the structures of phthalocyanine, the co-adsorbent, and the electrolytes. Furthermore, multi-dye
type DSSC was investigated, which mixed a phthalocyanine and a carotenoid derivative. The conversion efficiency of
the multi-dye DSSC increased compared with the DSSC which used single dye.
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