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Efficiency enhancement in DSSC using metal nanoparticles: A size dependent study

DSpace at IIT Bombay

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Title Efficiency enhancement in DSSC using metal nanoparticles: A size dependent study
 
Creator DEEPA, KG
LEKHA, P
SINDHU, S
 
Subject DSSC
Au nanoparticle
Extinction cross-section
Surface plasmon scattering
Cyclic voltammetry
SOLAR-ENERGY CONVERSION
GOLD NANOPARTICLES
FERMI-LEVEL
TIO2
 
Description The photoelectrode of Eosin-Y sensitised DSSC was modified by incorporating Au-nanoparticles to enhance the power conversion efficiency via scattering from surface plasmon polaritons. Size dependence of Au nanoparticle on conversion efficiency was performed in DSSC for the first time by varying the particle size from 20 to 94 nm. It was found that, the conversion efficiency is highly dependent on the size of the Au nanoparticles. For larger particles (>50 nm), the efficiency was found to be increased due to constructive interference between the transmitted and scattered waves from the Au nanoparticle while for smaller particles, the efficiency decreases due to destructive interference. Also a reduction in the V-oc was observed in general, due to the negative shifting of the TiO2 Fermi level on the adsorption of Au nanoparticle. This shift was negligible for larger particles. When 94 nm size particles were employed the conversion efficiency was doubled from 0.74% to 1.52%. This study points towards the application of the scattering effect of metal nanoparticle to enhance the conversion efficiency in DSSCs. (C) 2011 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-16T14:46:22Z
2014-10-16T14:46:22Z
2012
 
Type Article
 
Identifier SOLAR ENERGY, 86(1)326-330
http://dx.doi.org/10.1016/j.solener.2011.10.007
http://dspace.library.iitb.ac.in/jspui/handle/100/15820
 
Language en