The optical properties of chlorin-doped nc-TiO2 and the photovoltaic efficiency on DSSC

This study investigated the optical characterization of a chlorin-doped nanocrystalline titanium dioxide (nc-TiO2) and its application to dye-sensitized solar cells. Chlorin local dye was extracted from bahama grass.The dyesensitized nc-TiO2 was found to have a reduced band gap energy and could absorb light beyond the ultraviolet region. Avaspec 2.1 spectrophotometer was used to obtain the optical absorption spectrum, while the well-known Tauc model was employed to determine the optical band gap. The transmittance spectrum was shown while the variation of the refractive index was studied using the Moss Rule. The behaviour of the extinction coefficient was also investigated. The energy conversion efficiency of a dye-sensitized solar cell fabricated from chlorin-doped nanocrystalline titanium dioxide was 1.008%.

Author(s): Jude O. Ozuomba and Azubuike J. Ekpunobi

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