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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 9
BKCSDE 33(9)
September 20, 2012 

 
Title
Light Scattering Amplification on Dye Sensitized Solar Cells Assembled by Hollyhock-shaped CdS-TiO2 Composites
Author
Gayoung Lee, Huryul Lee, Myeong-Heon Um, Misook Kang*
Keywords
Dye-sensitized solar cells, CdS-TiO2, Scattering layer, Incident photon-to-current conversion efficiency, Electrochemical impedance spectroscopy
Abstract
To investigate the scattering layer effect of a TiO2 multilayer in dye-sensitized solar cells (DSSCs), we designed a new DSSC system, assembled with a CdS-TiO2 scattering layer electrode. A high-magnification SEM image exhibited hollyhock-like particles with a width of 1.5-2.0 μm that were aggregated into 10-nm clumps in a hexagonal petal shape. The efficiency was higher in the DSSC assembled with a CdS-TiO2 scattering layer than in the DSSC assembled with TiO2-only layers, due to the decreased resistance in electrochemical impedance spectroscopy (EIS). The short-circuit current density (Jsc) was increased by approximately 7.26% and the open-circuit voltage (Voc) by 2.44% over the 1.0 wt % CdS-TiO2 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-TiO2 scattering layer.
Page
3043 - 3047
Full Text
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