Hierarchical SnO2@SnS2 Counter Electrodes for Remarkable High-efficiency Dye-sensitized Solar Cells
Document Type
Article
Publication Date
12-20-2015
Abstract
A hierarchical SnO2@SnS2 core-shell nanostructure has been prepared by in situ surface sulfurization of hollow SnO2 sphere via a facile two-step solution-based method and used as a substitute for conventional Pt counter electrode (CE) for dye-sensitized solar cells (DSSCs) for the first time. The resulted semitransparent SnO2@SnS2 CEs demonstrate a high electrical conductivity and excellent catalytic activity, which are attributed to the synergetic effect of each component in such hierarchical nanostructure. The hierarchical SnO2@SnS2 CE achieves an impressive photovoltaic conversion efficiency (PCE) of 8.08%, which is significantly higher than those of individual SnO2 (5.26%) and SnS2 (6.00%) and also higher than Pt (7.88%) by 2.5%. This study suggests that the inexpensive hierarchical SnO2@SnS2 CE is a good alternative to the expensive Pt CE in DSSCs.
Publication Source (Journal or Book title)
Electrochimica Acta
First Page
125
Last Page
132
Recommended Citation
Cui, X., Xu, W., Xie, Z., & Wang, Y. (2015). Hierarchical SnO2@SnS2 Counter Electrodes for Remarkable High-efficiency Dye-sensitized Solar Cells. Electrochimica Acta, 186, 125-132. https://doi.org/10.1016/j.electacta.2015.10.148