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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/14216

Title: Graphene Supported Platinum Nanoparticle Counter-Electrode for Enhanced Performance of Dye-Sensitized Solar Cells
Authors: BAJPAI, R
ROY, S
KUMAR, P
BAJPAI, P
KULSHRESTHA, N
RAFIEE, J
KORATKAR, N
MISRA, DS
Keywords: PULSED-LASER DEPOSITION
CARBON
OXIDE
FILMS
TRANSPARENT
CATALYSTS
EFFICIENT
GRAPHITE
Issue Date: 2011
Publisher: AMER CHEMICAL SOC
Citation: ACS APPLIED MATERIALS & INTERFACES,3(10)3884-3889
Abstract: Composites of few layered graphene (G) and platinum (Pt) nanoparticles (NP) with different loadings of Pt were used as counter electrode (CE) in dye-sensitized solar cell (DSSC). NPs were deposited directly on to G using pulsed laser ablation method (PLD). DSSCs formed using the composite CEs show improved performance compared to conventional Pt thin film electrode (Std Pt) and unsupported Pt NPs. Composite with 27% loading of Pt shows 45% higher efficiency (eta = 2.9%), greater short circuit current (J(sc) = 6.67 mA cm(-2)), and open circuit voltage (V(oc) = 0.74 V) without any loss of the fill factor (FF = 58%) as compared to the cells fabricated using Std Pt electrodes. Values of eta, J(sc) and V(oc) for DSSC using Std Pt CE were 2%, 5.05 mA cm(-2) and 0.68 V, respectively. Electrochemical impedance spectroscopy using I(3)(-)/I(-) redox couple confirm lower values of charge transfer resistance for the composite electrodes, e.g., 2.36 Omega cm(2) as opposed to 7.73 Omega cm(2) of Std Pt. The better catalytic activity of these composite materials is also reflected in the stronger I(3)(-) reduction peaks in cyclic voltammetry scans.
URI: http://dx.doi.org/10.1021/am200721x
http://dspace.library.iitb.ac.in/jspui/handle/100/14216
ISSN: 1944-8244
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