NDLI: One-dimensional hierarchical titania for fast reaction kinetics of photoanode materials of dye-sensitized solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Qu, J. Li, G. R. Gao, X. P.
Copyright Year	2010
Abstract	To overcome kinetic limitations of nanoparticles and one-dimensional nanostructures, and enhance fast reaction kinetics of photoanode materials for dye-sensitized solar cells, one-dimensional hierarchical titanate was prepared by coating protonated titanate nanoparticles on one-dimensional protonated titanate nanorods. The one-dimensional hierarchical titania was obtained subsequently after calcination at different temperatures, and was characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET). The photoelectrochemical and electrochemical performance of the one-dimensional hierarchical titania was then carried out by photocurrent–voltage curves, electrochemical impedance spectroscopy (EIS), intensity-modulated photovoltage spectroscopy (IMVS) and intensity-modulated photocurrent spectroscopy (IMPS). It is clear that titania nanoparticles grow uniformly on the surface of titania nanorods. The one-dimensional hierarchical titania obtained subsequently can not only provide a matrix similar to the hybrid structure matrix but also avoid forming a large amount of grain boundaries, since the hierarchical structure forms by growth of nanoparticles on nanorods. In particular, the titania with such hierarchical structures after calcination at 600 and 700 °C show optimized fast reaction kinetics: low charge-transfer resistance, fast electron transport and long electron lifetime. The knowledge acquired in this work is important for the design of efficient photoanode materials of dye-sensitized solar cells.
Starting Page	2003
Ending Page	2009
Page Count	7
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	3
Issue Number	12
Journal	Energy & Environmental Science
DOI	10.1039/c003646c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Dye-sensitized solar cell Calcination Powder diffraction Transmission electron microscopy Photoelectrochemical cell Electrochemistry Electrical impedance Spectroscopy Photocurrent Composite material Crystallite
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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