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Enhanced Photovoltaic Properties of Nb(2)O(5)-Coated TiO(2) 3D Ordered Porous Electrodes in Dye-Sensitized Solar Cells.
MedLine Citation:
PMID:  23153118     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
This paper describes the use of Nb(2)O(5)-coated TiO(2) 3D ordered porous electrodes in dye-sensitized solar cells. We employed bilayer inverse opal structures as a backbone of 3D porous structures, and the number of Nb(2)O(5) coatings was controlled, determining the concentration of Nb(2)O(5) coating. XPS measurements confirmed the formation of Nb(2)O(5). The uniformity of the Nb(2)O(5) coating was characterized by elemental mapping using SEM and TEM measurements. Photovoltaic measurement on dye-sensitized solar cells (DSSCs) that incorporated Nb(2)O(5)/TiO(2) inverse opal electrodes yielded a maximum efficiency of 7.23% for a 3.3 wt % Nb(2)O(5) coating on a TiO(2) IO structure. The Nb(2)O(5) significantly increased the short-circuit current density (J(SC)). Electrochemical impedance spectroscopy was used to measure the J(SC), revealing an enhanced electron injection upon deposition of the Nb(2)O(5) coating.
Authors:
Hye-Na Kim; Jun Hyuk Moon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-15
Journal Detail:
Title:  ACS applied materials & interfaces     Volume:  -     ISSN:  1944-8252     ISO Abbreviation:  ACS Appl Mater Interfaces     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101504991     Medline TA:  ACS Appl Mater Interfaces     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Chemical and Biomolecular Engineering, Sogang University , Seoul 121-742, South Korea.
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