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http://dx.doi.org/10.5012/bkcs.2012.33.9.3043

Light Scattering Amplification on Dye Sensitized Solar Cells Assembled by Hollyhock-shaped CdS-TiO2 Composites  

Lee, Ga-Young (Department of Chemistry, College of Science, Yeungnam University)
Lee, Hu-Ryul (Department of Chemistry, College of Science, Yeungnam University)
Um, Myeong-Heon (Department of Chemical Engineering, College of Engineering, Kongju National University)
Kang, Mi-Sook (Department of Chemistry, College of Science, Yeungnam University)
Publication Information
Bulletin of the Korean Chemical Society / v.33, no.9, 2012 , pp. 3043-3047 More about this Journal
Abstract
To investigate the scattering layer effect of a $TiO_2$ multilayer in dye-sensitized solar cells (DSSCs), we designed a new DSSC system, assembled with a CdS-$TiO_2$ scattering layer electrode. A high-magnification SEM image exhibited hollyhock-like particles with a width of 1.5-2.0 ${\mu}m$ that were aggregated into 10-nm clumps in a hexagonal petal shape. The efficiency was higher in the DSSC assembled with a CdS-$TiO_2$ scattering layer than in the DSSC assembled with $TiO_2$-only layers, due to the decreased resistance in electrochemical impedance spectroscopy (EIS). The short-circuit current density ($J_{sc}$) was increased by approximately 7.26% and the open-circuit voltage ($V_{oc}$) by 2.44% over the 1.0 wt % CdS-$TiO_2$ composite scattering layer and the incident photon-to-current conversion efficiency (IPCE) in the maximum peak was also enhanced by about 5.0%, compared to the DSSC assembled without the CdS-$TiO_2$scattering layer.
Keywords
Dye-sensitized solar cells; CdS-$TiO_2$ Scattering layer; Incident photon-to-current conversion efficiency; Electrochemical impedance spectroscopy;
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