Abstract
Delafossite materials like CuGaO2 have been receiving much attention due to their potential role in the elaboration of future tandem dye sensitized solar cells. P-type CuGa1−xFexO2 (0≤x≤0.05) with delafossite structure has been obtained by hydrothermal method. Fe-doped and undoped CuGaO2 thin films have been investigated as cathode elements in N719 dye-sensitized solar cells. Integration of iron dopants in the delafossite structure improves the photovoltaic performance of CuGaO2 thin films both due to excellent optical transparency of CuGaO2 in the visible range and its high electrical conductivity. Also Fe leads to a pronounced hydrophilic character and to a higher dye uptake than the undoped sample.
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