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nanorod-layers
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Charge transport properties in nanocomposite photoanodes of DSSCs: Crucial role of electronic structure
, Article EPJ Applied Physics ; Volume 57, Issue 2 , February , 2012 ; 12860042 (ISSN) ; Taghavinia, N ; Iraji Zad, A ; Marandi, M ; Tajabadi, F ; Sharif University of Technology
Abstract
TiO 2 nanorods, TiO 2 nanorod/TiO 2 nanoparticle and TiO 2 nanorod/ZnO nanoparticle composite structures were integrated as photoanodes in backside illuminated dye-sensitized solar cells (DSSCs). Incorporation of TiO 2 nanoparticles into the bare nanorods increased the dye loading and improved the short-circuit current density (J sc) from 2.22 mA/cm 2 to 3.57 mA/cm 2. ZnO nanoparticles electrochemically grown into the TiO 2 nanorod layer could increase the surface area. Nevertheless, this considerably reduced the J sc to 0.57 mA/cm 2 and consequently cell efficiency. Electrochemical impedance spectroscopy (EIS) results showed that ZnO incorporated samples have better effective diffusion...