Influence of Polar-PVDF Interfaces Upon Organic Ferroelectric Dye-Sensitized Solar Cell Characteristics.

Recombination of charge carriers is the major issue for the sustainable operation of dye-sensitized solar cells (DSSC). Generally, an external voltage bias is necessary to efficiently segregate the excitons and restrict recombination. A ferroelectric An organic ferroelectric DSSC has been fabricated, and the performance was examined by altering the thickness of the ferroelectric polyvinylidene fluoride (PVDF) thin film stratum. The PVDF was coated using the spin-coating method, and the TiO₂ anode and nitrogen-doped reduced graphene nanosheet cathode layers were coated using the doctor blade method. An enhancement in J_sc and V_oc has been noted by a decrease in PVDF film thickness. A maximum efficiency of 3.9%, along with a 70.9% fill factor, was achieved for the irradiation of 10 mW/cm² for the DSSC made with an 80-nm-thick ferroelectric PVDF layer. Further, the performance has been tested by coating the TiO₂ anode using spin coating. After evaluating the current–voltage characteristics with a single diode model, it was found that low series and high shunt resistances are responsible for the observed enhancement in V_oc, leading to an overall increase in device efficiency. [ABSTRACT FROM AUTHOR]