A novel porphyrin derivative with a carboxyl group has been designed and synthesized for use as sensitizers in dye-sensitized solar cells (DSSCs). The structure of the porphyrin derivative was fully characterized by 1H-NMR, FT-IR and MS. Its photophysical and electrochemical properties were investigated by means of fluorescence emission spectra, cyclic voltammogram and other methods. The specific molecular design the sensitizer greatly retards the rate of interfacial back electron transfer from the conduction band of the nanocrystalline titanium dioxide film to the I-/I3- mediator. Since the porphyrin harvested sunlight across the visible spectrum, large photocurrent was generated. The position and nature of the bridge connecting the porphyrin ring and alkoxy group showed significant influences on the spectral, electrochemical, and photovoltaic properties of these sensitizers.

Synthesis, spectral, electrochemical, and photovoltaic properties of novel zinc porphyrin sensitizers for dye-sensitized solar cells

246th National Meeting (2013)

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