Abstract
The efficiency of the best Dye sensitized solar cell is primarily depends on the good light harvesting property of the photo anode. Present study uses Lawsone (2 hydroxy [1, -naphthoquinone), the natural dye and compare the performance of photo anode in bare TiO2 and with nanoporous CaCO3 coated TiO2. As compared to bare TiO2, the surface area of nanoporous CaCO3-coated TiO2 increases, consequently, a better amount of dye adsorption occurs. The coating of CaCO3 increases the impedance at TiO2/dye/electrolyte interface and affect lifetime of the photoelectrons. Due to this reasons the short circuit current Jsc, open-circuit voltage (Voc), and fill factor (FF) increases. Thereby, the energy conversion efficiency of the solar cell is improved.
Highlights
R low cost production, environment friendly elements, and comparatively high-energy conversion efficiency
TiO2 nanoparticles have been extensively modified by using various oxide coating layers like ZnO, Al2O3, MgO, by this modification the cell efficiency of DSSCs improved considerably
The X-ray diffraction (XRD) of the products produced from the reaction between Ca(NO3)2 and NaOH is shown in Fig.3.The thermal decomposition of Ca(OH)2 in the presence of N2 gas leads to the formation of a CaO phase
Summary
R low cost production, environment friendly elements, and comparatively high-energy conversion efficiency. To fabricate such a cell, the sensitizer (dye) that harvests the photons in near IR region is adsorbed [2] to the surface of a wide band gap semiconductor, typically an oxide such as TiO2 film. The dye is regenerate by hole injection from an electrolyte, an ionic liquid containing the majority of iodide/tri iodide couple as a redox system. R difference between the energy level of electron in the oxide and the work function of the hole conductor or the redox potential of the electrolyte.
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