Abstract
We applied the nitrogen-doped graphene@nickel oxide (NGE/NiO) nanocomposite doped TiO2 as a photo-anode for dye-sensitized solar cells (DSSCs) on fluorine-doped tin oxide (FTO) substrates by screen printing method. Power conversion efficiency (PCE) of 9.75% was achieved for this DSSCs device, which is greater than that of DSSCs devices using GO/TiO2, and NiO/TiO2 based photo-anodes (PCE=8.55, and 9.11%). Also, the fill factor (FF) of the DSSCs devices using the NGE/NiO/TiO2 nanocomposite photo-anode was better than that of other photo-anodes. The NGE/NiO/TiO2 short-circuit photocurrent density (Jsc) of 19.04mAcm−2, open circuit voltage (Voc) of 0.76V, fill factor (FF) of 0.67 and dye absorption rate 0.21×10−6molcm−2. The obtained results suggest that as-prepared NGE/NiO/TiO2 nanocomposite is suitable photo-anode for DSSCs application.
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