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

Hany M Abd El-Lateef; Mai M Khalaf; Van-Duong Dao; Ibrahim M A Mohamed

doi:10.3390/ma15176175

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

Materials (Basel). 2022 Sep 5;15(17):6175. doi: 10.3390/ma15176175.

Authors

Hany M Abd El-Lateef^{1

2}, Mai M Khalaf^{1

2}, Van-Duong Dao³, Ibrahim M A Mohamed²

Affiliations

¹ Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia.
² Department of Chemistry, Faculty of Science, Sohag University, Sohag 82524, Egypt.
³ Faculty of Biotechnology, Chemistry and Environmental Engineering, Phenikaa University, Hanoi 10000, Vietnam.

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.

Keywords: N-doping; impedance analysis; nanofibers; photoanode substrate; solar energy.

Grants and funding

Grant837/King Faisal University