Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

New Flexible Electrospun PET/TiO2 Composite Photoanode Layer for Dye-Sensitized Solar Cells, DSSCs, and Its Photovoltaic Performances

Version 1 : Received: 16 May 2024 / Approved: 17 May 2024 / Online: 17 May 2024 (04:24:01 CEST)

How to cite: Gallah, H.; Mighri, F.; Ajji, A.; Bandyopadhyay, J.; Ben Ghorbel, N. A.; Castillo-Rodriguez, J. New Flexible Electrospun PET/TiO2 Composite Photoanode Layer for Dye-Sensitized Solar Cells, DSSCs, and Its Photovoltaic Performances. Preprints 2024, 2024051142. https://doi.org/10.20944/preprints202405.1142.v1 Gallah, H.; Mighri, F.; Ajji, A.; Bandyopadhyay, J.; Ben Ghorbel, N. A.; Castillo-Rodriguez, J. New Flexible Electrospun PET/TiO2 Composite Photoanode Layer for Dye-Sensitized Solar Cells, DSSCs, and Its Photovoltaic Performances. Preprints 2024, 2024051142. https://doi.org/10.20944/preprints202405.1142.v1

Abstract

Flexible polymer-based dye-sensitized solar cells (DSSCs) offer promising potential for lightweight, cost-effective and versatile photovoltaic applications. However, the critical challenge in their widespread applications is the weak thermal stability of the majority of polymeric substrates, which can only withstand a maximum temperature processing of 150°C. In this study, we propose a facile and low-cost strategy to develop at low temperature DSSC flexible photoanode based on a polymeric matrix. Highly porous nanocomposites fibrous mats composed of polyethylene terephthalate (PET) and titanium dioxide (TiO2) nanobars were prepared through electrospinning process using different configurations (uniaxial electrospinning, coaxial electrospinning, and electrospray-assisted electrospinning). These techniques enabled precise control of the microstructure and the positioning of TiO2 within the composite nanofibers. Therefore, the as-produced photoanodes were loaded with N719 dye and tested in DSSC prototype using iodide-triiodide electrolyte and platinum (Pt) coated counter electrode. The results show that incorporating TiO2 on the fiber surface through the electrospray-assisted electrospinning enhanced the performance of the nanofiber composite, leading to improved dye loading capacity, electron transfer efficiency and photovoltaic performance.

Keywords

Electrospinning; Electrospraying; Coaxial electrospinning; Nanocomposites; Nanofibers; Flexible DSSCs; Photoanode; TiO2

Subject

Chemistry and Materials Science, Materials Science and Technology

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