Jump to main content
Jump to site search

Issue 9, 2011
Previous Article Next Article

Origin of efficiency enhancement in Nb2O5 coated titanium dioxide nanorod based dye sensitized solar cells

Author affiliations

Abstract

Ordered one-dimensional metal oxides are considered promising architectures for dye-sensitized solar cells (DSC). Here we explore the properties determining the photovoltaic performance of DSC based on titanium dioxide nanorods prepared by a hydrothermal method. Ultrathin conformal coating with other oxides such as Al2O3 or Nb2O5 has been widely used in the literature to improve the conversion efficiency. Usually the effects attributed to the coating are either to prevent recombination by barrier effect or to change the position of titanium dioxide conduction band. Here we show that coating TiO2 nanorods with Nb2O5 increases the photocurrent and conversion efficiency of the DSC. However, impedance spectroscopy results indicate that neither recombination is reduced by the coating nor the conduction band position is moved. The improvement in the performance of the cell has been attributed to an enhancement in the charge injection efficiency promoted by Nb2O5.

Graphical abstract: Origin of efficiency enhancement in Nb2O5 coated titanium dioxide nanorod based dye sensitized solar cells

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 20 Feb 2011, accepted on 22 Mar 2011 and first published on 13 May 2011


Article type: Paper
DOI: 10.1039/C1EE01193F
Citation: Energy Environ. Sci., 2011,4, 3414-3419
  •   Request permissions

    Origin of efficiency enhancement in Nb2O5 coated titanium dioxide nanorod based dye sensitized solar cells

    E. Barea, X. Xu, V. González-Pedro, T. Ripollés-Sanchis, F. Fabregat-Santiago and J. Bisquert, Energy Environ. Sci., 2011, 4, 3414
    DOI: 10.1039/C1EE01193F

Search articles by author