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http://dx.doi.org/10.9713/kcer.2012.50.1.177

Dye-Sensitized Solar Cell Based on TiO2-Graphene Composite Electrodes  

Battumur, T. (Division of Chemical Engineering, Chonbuk National University)
Yang, Wooseung (Division of Chemical Engineering, Chonbuk National University)
Ambade, S.B. (Division of Chemical Engineering, Chonbuk National University)
Lee, Soo-Hyoung (Division of Chemical Engineering, Chonbuk National University)
Publication Information
Korean Chemical Engineering Research / v.50, no.1, 2012 , pp. 177-181 More about this Journal
Abstract
Dye-sensitized solar cells(DSSCs) based on $TiO_2$ film photo anode incorporated with different amount of grapheme nanosheet(GNS) are fabricated and their photovoltaic performance are investigated. The $TiO_2$-GNS composite electrode has been prepared by a direct mixing method. The DSSC performance of this composite electrode was measured using N3 dye as a sensitizer. The performance of DSSCs using the $TiO_2$-GNS composite electrodes is dependent on the GNS loading in the electrodes. The results show that the DSSCs incorporating 0.01 wt% GNS in $TiO_2$photo anode demonstrates a maximum power conversion efficiency of 5.73%, 26% higher than that without GNS. The performance improvement is ascribed to increased N3 dye adsorption, the reduction of electron recombination and back transport reaction as well as enhancement of electron transport with the introduction of GNS. The presence of both $TiO_2$(anatase) and GNS has been confirmed by FieldEmission Scanning Electron Microscopy(FE-SEM). The decrease in recombination due to GNS in DSSCs has been investigated by the Electrochemical Impedance Spectroscopy.
Keywords
Dye Sensitised Solar Cell(DSSC); $TiO_2$; Graphene; Composite Electrode;
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