Electrochemical Impedance Investigation of Dye-Sensitized Solar Cells Based on Electrospun TiO2 Nanofibers Photoanodes

Abstract

This work investigates an electrochemical impedance analysis based on synthesized TiO2 nanofibers (NFs) photoanodes, which were fabricated via electrospinning and calcination. The investigated photoanode substrate NFs were studied in terms of physicochemical tools to investigate their morphological character, crystallinity, and chemical contents via scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) analyses. As a result, the studied photoanode substrate NFs were applied to fabricate dye-sensitized solar cells (DSCs), and the electrochemical impedance analysis (EIS) was studied in terms of equivalent circuit fitting and impacts of N-doping, the latter of which was approved via XPS analysis. N-doping has a considerable role in the enhancement of charge transfers, which could be due to the strong interactions between active-site N atoms and the used photosensitizer.

Boosting the Photoelectrochemical Water Oxidation Performance of TiO2 Nanotubes by Surface Modification Using Silver Phosphate

“…The choice of the equivalent electrical circuit is dependent on the behavior of the plots, as seen from the inset of Figure 8a; two-time constants were seen, and the fitted curves were in good agreement with the experimental data throughout the entire frequency range. As reported previously [51,52], the most appropriate circuit for the analysis of TNTs is (Rs(Q1(R1(Q2R2)))). Evidently, Ag 3 PO 4 -addition enriched the chargecarrier density and electronic conductivity, thereby decreasing the resistance (Table S2, Supplementary Materials).…”

Functionalization of PLA nanofibers with PCL blending and TiO2 nanoparticle addition

“…TiO 2 nanoparticles have significant interest due to their self-cleaning, low cost, and antibacterial characteristics. They are also highly adaptable to a wide range of applications, including but not limited to solar cells and tissue engineering [5,30,[41][42][43][44]. Their effectiveness is contingent upon the size, shape, phase, and physical characteristics of the individual particles within the matrix or on the surface of the materials [45].…”

Effects of the morphology and diameter of TiO2 nanofibers as light-scattering layers on the efficiency of dye-sensitized solar cells

“…El-Lateef et al has succeeded in forming TiO 2 nanofibers with different matrix polymer i.e. polyvinyl acetate at an applied voltage of 12 kV, and the distance between the needle tip to the collector was 16 cm, resulting diameter of nanofibers around 100-250 nm [29]. Based on these reseraches, the difference in applied voltage affects the diameters of nanofibers.…”