Bio-photovoltaic conversion device using chlorine-e6 derived from chlorophyll from Spirulina adsorbed on a nanocrystalline TiO2 film electrode

Absorption Spectra of Natural Dyes and Their Effect on Efficiency of ZnO Based Dye-Sensitized Solar Cells

“…For the solar-energy conversion, as mostly by the form of crystalline solar cell, DSSCs with nanocrystalline ceramics, dye molecules, and electrolytes are recently developed for light harvesting (Gratzel 2003,Tennakone et al 1996. DSSCs are a promising low cost, green energy source ( Hao et al 2006, Amao et al 2004. A power conversion efficiency of 11.18% has been achieved (Gratzel 2003).…”

“…Generally, transition metal coordination compounds (ruthenium poly-pyridyl complexes) are used as the effective sensitizers, due to their intense chargetransfer absorption in the whole visible range and highly efficient metal-to-ligand charge transfer (Duffy et al 2000, Gratzel 2001& Law et al 2005. However, ruthenium polypyridyl complexes contain a heavy metal, which is undesirable from point of view of the environmental aspects and high cost (Amao & Komori 2004). Moreover, the process to synthesize the complexes is complicated and costly.…”

Photovoltaic Characterization of Dye-sensitized Solar Cells with Natural Dyes using Synthesized ZnO nanostructures

“…DSSCs are a promising low cost, green energy source 3,4 . A power conversion efficiency of 11.18% has been achieved in 2005 1 .…”

“…The absorption spectrum of the dye and the anchorage of the dye to the surface of ZnO are important parameters determining the efficiency of the cell 2 .Generally, transition metal coordination compounds (ruthenium polypyridyl complexes) are used as the effective sensitizers, due to their intense chargetransfer absorption in the whole visible range and highly efficient metal-to ligand charge transfer 3 . However, ruthenium polypyridyl complexes contain a heavy metal, which is undesirable from point of view of the environmental aspects and high cost 4 .…”

Catalytic Effect of Thioles in Oxidation of the Vinyl Group to Aldehyde in Chlorophyll a Derivatives

“…Interest in the chemical transformations of chlorophylls and their derivatives is due not only to significant role of these compounds in nature, but also the possibility of their use as precursors for the synthesis of compounds, which find application in various fields (medicine, [1][2][3] catalysis, [4] design of polymeric nanomaterials for photoelectronics, [5][6][7][8] etc.) Oxidation of the vinyl group in chlorophyll a and its derivatives to the aldehyde with formation of the corresponding d-series derivatives is widely used in the chemistry of these compounds as an initial conversion step.…”