SnO₂ nanosheet as a photoanode interfacial layer for dye-sensitized solar cells

Abstract

SnO₂ nanosheet films about 200 nm in thickness are successfully fabricated on fluorine-doped tin oxide (FTO) glass by a facile solution-grown approach. The prepared SnO₂ nanosheet film is applied as an interfacial layer between the nanocrystalline TiO₂ film and the FTO substrate in dye-sensitized solar cells (DSCs). Experimental results show that the introduction of a SnO₂ nanosheet film not only suppresses the electron back-transport reaction at the electrolyte/FTO interface but also provides an efficient electron transition channel along the SnO₂ nanosheets, and as a result, increasing the open circuit voltage and short current density, and finally improving the conversion efficiency for the DSCs from 3.89% to 4.62%.

Keywords

SnO2 Nanosheet / Short Current Density / Nanosheet Film / Nanosheet Layer / Propylimidazolium Iodide

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