NDLI: Enhanced electron collection in photoanode based on ultrafine TiO2 nanotubes by a rapid anodization process

Content Provider	Springer Nature Link
Author	Zhong, Peng Liao, Yulong Que, Wenxiu Jia, Qiaoying Lei, Tianmin
Copyright Year	2014
Abstract	The separated and ultrafine TiO2 nanotubes are fabricated by a modified rapid anodization method, which cannot be achieved through conventional anodization. Then, model dye-sensitized solar cells based on the prepared TiO2 nanotubes and commercial TiO2 nanoparticles (P25) are investigated, and a discrepancy is discovered between the light-harvesting capability and the power conversion efficiency. The charge transport and recombination are studied by the electrochemical impedance spectroscopy and the open-circuit voltage decay technique. Results show that the nanotube photoanode owns a longer electron diffusion length and a larger electron lifetime than the nanoparticle one, which can compensate for the loss of light absorption. The enhanced electron collection efficiency observed is attributed to the facilitated charge carrier pathways in the photoanode composed by the separated TiO2 nanotubes fabricated in this work. Therefore, the TiO2 nanotubes synthesized by this method are verified to have good electronic properties, which might find applications not only in photovoltaic, but also in catalysis, sensors, and other areas.
Starting Page	2087
Ending Page	2098
Page Count	12
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	18
Issue Number	8
e-ISSN	14330768
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-03-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dye-sensitized solar cell Titania nanotube Electrochemical impedance spectroscopy Electron diffusion length Rapid anodization Physical Chemistry Electrochemistry Energy Storage Characterization and Evaluation of Materials Analytical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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