Fabrication and analysis of photoelectrode based on TiO₂ nanotube/phosphor mixed TiO₂ nanoparticle film for dye-sensitised solar cells
by Dong Hoon Cho; Kyung Hwan Kim; Chang Seob Kim; Hyung Wook Choi
International Journal of Nanotechnology (IJNT), Vol. 13, No. 10/11/12, 2016

Abstract: Dye-sensitised solar cells (DSSCs) have attracted scientific attention because of their advantages over former Si-based devices, such as flexibility, light weight, low cost, and low toxicity of the manufacturing process. Generally, DSSCs are composed of a titanium dioxide (TiO₂) layer as the working electrode, on which an anchored organic dye is absorbed, a Pt layer as the counter electrode, and an electrolyte containing a redox couple (I⁻/I₃⁻) between them. However, a number of problems remain to be solved to improve their efficiency. We fabricated a hybrid photoelectrode comprising a TiO₂ nanotube (TNT)/phosphor mixed TiO₂ nanoparticle film on a TiO₂ passivating layer to improve the dye adsorption and charge transport as well as reduce the electron recombination. In this paper, we describe the enhancement of the photovoltaic performance of a DSSC obtained via using a TiO₂ passivation layer and a TNT/phosphor mixed TiO₂ paste photoelectrode. The DSSCs with FTO glass pretreated in 90 mM TiCl₄ for 90 min exhibited the highest efficiency of 5.98% and a J_SC of 13.17 mA/cm².

Online publication date: Wed, 16-Nov-2016

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