Nano-Micro Letters

Enhanced Electrocatalytic Activity by RGO/MWCNTs/NiO Counter Electrode for Dye-sensitized Solar Cells

Majid Raissan Al-bahrani 1,2 , Waqar Ahmad1,

Hadja Fatima Mehnane3, Ying Chen1, Ze Cheng4, Yihua Gao1,*

Abstract
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Nano-Micro Letters, , Volume 7, Issue 3, pp 298-306

First Online: 17 May 2015 (Article)

DOI:10.1007/s40820-015-0043-7

 

Abstract

 


Schematic flowchart showing the fabrication process for RGO/MWCNTs/NiO composite

 

We applied the reduced graphene oxide/multi-walled carbon nanotubes/nickel oxide (RGO/MWCNTs/NiO) nanocomposite as the counter electrode (CE) in dye-sensitized solar cells (DSSCs) on fluorine-doped tin oxide (FTO) substrates by blade doctor method. Power conversion ef´Čüciency (PCE) of 8.13 % was achieved for this DSSCs device, which is higher than that of DSSCs devices using NiO, RGO and RGO/NiO-CE (PCE = 2.71 %, PCE = 6.77 % and PCE = 7.63 %). Also, the fill factor (FF) of the DSSCs devices using the RGO/MWCNTs/NiO-CE was better than that of other CEs. The electron transfer measurement of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed that RGO/MWCNTs/NiO film could provide fast electron-transfer between the CE and the electrolyte, and high electrocatalytic activity for the reduction of triiodide in a CE based on RGO/MWCNTs/NiO in a DSSC. 

Keywords

Graphene oxide; Carbon nanotubes; Nickel oxide; Counter electrode; Dye-sensitized solar cells

 

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