Abstract
The existing energy situation demands not only the huge energy in a short time but also clean energy. In this regard, an integrated photo-supercapacitor device has been fabricated in which photoelectric conversion and energy storage are achieved simultaneously. A novel carbazole-based dye is synthesized and characterized for photosensitizer. The silver-doped titanium dioxide (Ag-TiO2) is synthesized, and it is used as photoanode material. Different concentrations of tetrabutylammonium iodide (TBAI)-doped polyvinyl alcohol–polyvinylpyrrolidone (PVA-PVP) blend polymer electrolytes are prepared, and their conductivity and dielectric properties were studied. Reduced graphene oxide (r-GO) is synthesized by a one-pot synthesis method and confirmed using Raman spectroscopy for counter electrode material in dye-sensitized solar cell (DSSC) and supercapacitor electrodes. The DSSC having 4% Ag-TiO2–based photoanode showed the highest efficiency of 1.06% (among r-GO counter electrodes) and 2.37% (among platinum counter electrodes). The supercapacitor before integration and after integration exhibits specific capacitance of 1.72 Fg−1 and 1.327 Fg−1, respectively.Graphical
Highlights
As a result of the energy crisis, demand for renewable energy resources has become critical and, in particular, the use of solar energy is gaining supreme interest due to its abundant availability in nature [1]
The CaBa dye shows three distinct bands of absorption: one band at 289.6 nm corresponding to the π–π* electron transitions of the conjugated molecules, the another band at 394 nm which can be attributed to an intramolecular charge transfer (ICT) between the carbazole-donating unit with the anchor group and the third band which is in between these two bands which arises due to the highest occupied molecular orbital (HOMO) −1 → lowest unoccupied molecular orbital (LUMO) or HOMO → LUMO +1 transition [32]
40% tetrabutylammonium iodide (TBAI) electrolyte showed the highest conductivity of 1.76 mS cm−1. Reduced graphene oxide (r-GO) was synthesized by a one-pot synthesis method and confirmed using X-ray diffraction (XRD) and FT-Raman
Summary
As a result of the energy crisis, demand for renewable energy resources has become critical and, in particular, the use of solar energy is gaining supreme interest due to its abundant availability in nature [1]. Dye-sensitized solar cells (DSSCs) have gained considerable attention among hybrid solar cells because of their advantages like low cost of production, long life, low light performance, variety, mechanical robustness and flexible product integration [2, 3]
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