Fabrication and characterization of dye-sensitized solar cells using electrospun TiO2 nanofibre as a solar light harvesting layer

In this work, we investigated the dye-sensitized solar cells (DSSCs) using photoanode, which were fabricated directly from electrospinning of TiO2 nanofibres onto the substrate. The electrochemical impedance spectroscopy (EIS) and current-voltage diagram were used to analyse electron transport in electrospun nanofibres and determine their applicability in DSSCs. In order to improve the short-circuit photocurrent of fabricated cells, we treated the electrospun TiO2 electrode with the TiCl4 aqueous solution. The modification of the photoelectrode significantly improves the power conversion efficiency (over 26%) of the solar cells attributed to the higher electron lifetime (t) and reduction in recombination processes as indicated by the EIS of the solar cells.