Noh, JH and Lee, S and Kim, JY and Lee, JK and Han, HS and Cho, CM and Cho, IS and Jung, HS and Hong, KS
(2009)
Functional multilayered transparent conducting oxide thin films for photovoltaic devices.
Journal of Physical Chemistry C, 113 (3).
1083 - 1087.
ISSN 1932-7447
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Abstract
In this study, we present a thermally stable multilayered transparent conducting oxide (TCO) functionalized for dye-sensitized solar cells (DSSCs). Nb-doped TiO 2 (NTO) layers deposited on conventional Sn-doped In 2O 3 (ITO) substrates using pulsed laser deposition (PLD) enhanced the optical-to-electrical conversion efficiency of the DSSCs by as much as 17% compared to that of bare ITO-based DSSCs. The electrical properties and J - V characteristics of the multilayered NTO/ITO films showed that the improved cell performance was due to the facilitated charge injection from TiO 2 to ITO that resulted from the formation of an ohmic contact with ITO, as well as the conserved high conductivity of ITO after the oxidizing annealing process. Moreover, the NTO/ITO-based DSSC exhibited higher efficiency than a F-doped SnO 2(FTO)-based one, which demonstrates that optimization of multilayered NTO-based TCOs is a realistic approach for achieving highly efficient photoenergy conversion devices. © 2009 American Chemical Society.
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