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Graphene supported nickel nanoparticle as a viable replacement for platinum in dye sensitized solar cells

DSpace at IIT Bombay

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Title Graphene supported nickel nanoparticle as a viable replacement for platinum in dye sensitized solar cells
 
Creator BAJPAI, R
ROY, S
KULSHRESTHA, N
RAFIEE, J
KORATKAR, N
MISRA, DS
 
Subject PULSED-LASER DEPOSITION
COUNTER-ELECTRODE
RAMAN-SPECTROSCOPY
GRAPHITE OXIDE
FILMS
TRANSPARENT
PERFORMANCE
DISORDER
SHEETS
GROWTH
 
Description A platinum free counter electrode for dye sensitized solar cells was developed using graphene platelets (GP) supported nickel nanoparticles (NPs) as the active catalyst. Few layered GP were prepared by chemical oxidation of graphite powders followed by thermal exfoliation and reduction. The nanoparticles of nickel were deposited directly onto the platelets by pulsed laser ablation. The composite electrodes of GP and Ni nanoparticles (GP-Ni) thus obtained showed better performance compared to conventional Pt thin film electrodes (Std Pt) and unsupported Ni NPs. The efficiencies of the cells fabricated using GP-Ni, Std Pt and Ni NP CEs were 2.19%, 2% and 1.62%, respectively. The GP-Ni composite solar cell operated with an open circuit voltage of 0.7 V and a fill factor of 0.6. Electrochemical impedance spectroscopy using the I-3(-)/I- redox couple confirms lower values of charge transfer resistance for the composite electrodes, 4.67 Omega cm(2) as opposed to 7.73 Omega cm(2) of Std Pt. The better catalytic capability of these composite materials is also reflected in the stronger I-3(-) reduction peaks in cyclic voltammetry scans.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-10-17T05:20:06Z
2014-10-17T05:20:06Z
2012
 
Type Article
 
Identifier NANOSCALE, 4(3)926-930
http://dx.doi.org/10.1039/c2nr11127f
http://dspace.library.iitb.ac.in/jspui/handle/100/16051
 
Language en