Lookup NU author(s): Dr Stevin Pramana
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A novel chemically stable Zn-Sn-O nanocactus structure has been synthesized for the first time using a hydrothermal method. The Zn-Sn-O nanocactus structure comprises a Zn poor-Zn 2SnO 4 plate and Zn-doped SnO 2 nanothorns growing on the plate, both of which have high electron mobilities. The nanocactus is used as the photoanode of dye-sensitized solar cells (DSSCs). The overall power conversion efficiency (PCE) for the Zn-Sn-O nanocactus film reaches 2.21%, which is twice the previous reported efficiency of pure SnO 2. Electrochemical impedance spectroscopy (EIS) measurements show that the Zn-Sn-O nanocactus film has a good effective diffusion length and high intrinsic electron mobility. After TiCl 4 treatment of the Zn-Sn-O nanocactus film, the current density increases nearly three times and the PCE increases to 6.62%, which compares favourably with the P25 DSSCs (6.97%) and is much higher than that of the SnO 2 (1.04%) or Zn 2SnO 4 (3.7%)-based DSSCs. © 2011 The Royal Society of Chemistry.
Author(s): Dou X, Mathews N, Wang Q, Pramana SS, Lam YM, Mhaisalkar S
Publication type: Article
Publication status: Published
Print publication date: 01/11/2011
Online publication date: 10/10/2011
ISSN (print): 2040-3364
ISSN (electronic): 2040-3372
Publisher: Royal Society of Chemistry
PubMed id: 21987215
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