Journal
SURFACES AND INTERFACES
Volume 33, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.surfin.2022.102236
Keywords
Co-sensitization; Dye-sensitized solar cell; Solid polymer electrolyte; Carbazole-based dye
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A novel organic sensitizer, NHC, with a donor-pi-acceptor architecture, is synthesized and used in dye-sensitized solar cells (DSSCs). The synthesized dye exhibits good photophysical, electrochemical, and photovoltaic performances. In addition, the use of HMIm(+)I(-) as a dopant in the polymer-based electrolyte solution improves the conductivity and efficiency of DSSCs. Co-sensitization of NHC with Z907 results in higher photovoltaic performance compared to using Z907 alone.
The donor-pi-acceptor architecture of a novel organic sensitizer (NHC) is synthesized and used in dye-sensitized solar cells (DSSCs). An azine-spacer (=N-N=) is employed to connect the 3-nitrobenzene anchor unit with the carbazole donor in the sensitizer. Photophysical, electrochemical, and photovoltaic performances of the synthesized dye are studied in depth. Further, polymer-based electrolytes were prepared by doping 1-n-hexyl-3-methylimidazolium iodide (HMIm(+)I(-)) to the polyvinylidene fluoride electrolyte solution and studied their conductivity and dielectric properties. DSSC fabricated with NHC dye and HMIm(+)I(-) -20% electrolyte displayed an efficiency of 1.24%. In addition, NHC co-sensitization with bis(isothiocyanato)(2,2'-bipyridyl-4,4' -dicarboxylato)(4,4'-dinonyl-2,2' -bipyridyl)ruthenium(II) (Z907) is investigated. As a result, the co-sensitized device exhibit greater photovoltaic performance, with an efficiency of 4.76% compared to the cell with Z907 (4.17%) alone, owing to higher short-circuit current density in conjunction with higher open-circuit voltages.
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