Abstract
Dye-sensitized solar cells (DSSCs) have acquired great prominence as favourable low-cost photovoltaics due to their ease of fabrication, all- year -availability, ease of obtaining raw materials and adjustable optical properties like transparency and colour. These advantages coupled with the ability to work under poor lighting makes them a suitable candidate for next generation of research. In this research, C.acuminata-sensitized photo anodes play an important role for achieving high performance since the porous metal oxide films provide a large specific surface area for dye loading and the possibility to extend the absorption threshold of past studies of sensitizers. The doctor blade method and high-temperature sintering were some of the methods used in the fabrication of the photo anode. A study of the performance of the C.acuminata-DSSCs with four different electrolyte sensitizers based on iodide redox mediator is determined. The result is DSSCs that exhibit a maximum power output of 39.37 W, fill factor of 0.7 and a power conversion efficiency of 0.6% under unfavourable sunlight intensity conditions and photo-degradation of about 37.5 % in absorbance after 425 suns.
Highlights
The Kola nut (Kola) a tropical African genus belonging to the Sterculiaceae family, has about one hundred and twenty-five species
We report Dye-sensitized solar cells (DSSCs) studies of organic C.acuminata dye based on TiO2 photo anode
Phytochemical screening C.acuminata reveals the presence of tannins, alkaloids, steroids, volatile oils, glycosides, saponin and cardiac glycosides
Summary
The Kola nut (Kola) a tropical African genus belonging to the Sterculiaceae family, has about one hundred and twenty-five species. The most prominent among the species are Cola acuminata (C.acuminata) and Cola nitida (C.nitida) due to their economic importance. Both are planted for their edible seed, C.acuminata is polycotyledonous while C.nitida is a dicotyledon fruit. Aside from its chemical constituent, Kola is rich in phenol it is an astringent. These two species bear a striking resemblance, C.nitida is of higher commercial importance due to the higher demand both locally and export [1]. The sensitizer has an influence on the power conversion efficiency of the DSSC and is crucial in the determination of the stability of the cell ; this property is the objective of our inquiry. Require elaborate purification during their preparation process
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