Abstract
Dye sensitized solar cells (DSSCs) are low-cost and environmentally friendly photovoltaic devices, bearing strong photo-conversion efficiency especially under indoor conditions. In this chapter recent advances obtained from vegetable and bioinspired dyes are presented and a comparison with those of synthetic origin are shown. The aim is to clarify the key concepts connected to electronic injection from the dye to titania semiconductor, photoelectrochemical properties and degradation of DSSCs. Developments of natural and bioinspired sensitizers to obtain photoanodes are outlined. Various counter-electrodes and electrolytes are considered. The limits and advantages of the relevant methods for the study of energy levels and time scales involved in charge transfer processes are discussed and supported by UV-Vis., FTIR, Raman, Emission spectra, cyclic voltammetry, Electrochemical impedence spectroscopy, Tafel and current-voltage characteristic curves, roughness factor. Finally all parameters connected to photoelectric conversion efficiency are shown and some assembly techniques of aforemensioned devices are highlighted.
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