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  1. Nurain Najihah Alias, Khatijah Aisha Yaacob
    Sains Malaysiana, 2016;45:1227-1234.
    Blue-pea flower, turmeric, mulberries, brown rice, purple cabbage and Indian mulberry leave were successfully form on
    TiO2 mesoporous film using immersion method to produce TiO2 mesoporous photoanode for natural dye sensitized solar
    cells (DSSCs) assembly. The TiO2 mesoporous films were formed after calcinations at 450˚C for 30 min. The photoanodes
    were dipped in different types of natural dye for 24, 72 and 120 h. The properties of natural dye were investigated by
    ultraviolet-visible spectroscopy (UV-vis) and Fourier transform infrared spectroscopy (FTIR). From UV-Vis spectroscopy
    analysis, the wavelength range of the natural dye studied in this research lays between 350 and 800 nm. The FTIR result
    of the natural dye shows the present of intermolecular H-bond, C=O stretching vibration, C-O-C stretching vibration,
    C=C bending and C-H bending which was due to the component of anthocyanin, carotenoids and chlorophyll. The
    characterization including field emission scanning electron microscopy (FESEM), energy dispersive x-ray (EDX) and x-ray
    diffraction (XRD) were carried out on the TiO2 mesoporous film. On the other hand, the conductivity of electrolyte for
    liquid electrolyte, gel electrolyte and solid electrolyte were also investigated. Gel electrolyte has the highest conductivity,
    26.1 mS/cm while liquid electrolyte and solid electrolyte obtained 17.34 and 0.45 mS/cm, respectively. Finally, solar
    cells were prepared by sandwiching the TiO2 mesoporous photoanode with Platinum (Pt) counter electrode. The results
    showed short circuit current, open circuit current voltage, fill factor and efficiency for all samples during the present of
    light. The highest efficiency was obtained from Blue-pea sample that immersed for 120 h with 0.123% efficiency.
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