Please use this identifier to cite or link to this item: https://doi.org/10.1111/j.1551-2916.2010.04003.x
Title: Structural and electrical properties of Nb-doped anatase TiO2 nanowires by electrospinning
Authors: Archana, P.S. 
Jose, R. 
Jin, T.M.
Vijila, C.
Yusoff, M.M.
Ramakrishna, S. 
Issue Date: Dec-2010
Citation: Archana, P.S., Jose, R., Jin, T.M., Vijila, C., Yusoff, M.M., Ramakrishna, S. (2010-12). Structural and electrical properties of Nb-doped anatase TiO2 nanowires by electrospinning. Journal of the American Ceramic Society 93 (12) : 4096-4102. ScholarBank@NUS Repository. https://doi.org/10.1111/j.1551-2916.2010.04003.x
Abstract: One-dimensional nanostructures of niobium-doped anatase TiO2 (Nb:TiO2) up to 5 at.% Nb were synthesized by electrospinning a polymeric solution containing titanium and niobium precursors and subsequent annealing. Thus obtained fibers had diameter ∼150 nm. The undoped TiO 2 fibers were constituted by larger single crystalline grains of size ∼50 nm, whereas the doped ones had decreased grain sizes (∼30 nm) under similar processing conditions. The Nb doping decreased the BET surface area of TiO2. A strain-induced lattice contraction was observed in Nb:TiO2. The continuous nanofibers were shortened to nanowires (NW) of aspect ratio 10:1 by ultrasonically dispersing them in acetic acid, which were developed as films of thickness ∼8-13 μm onto conducting glass substrates. The TiO2 and Nb:TiO2 nanowire films were further sensitized by a dye; the amount of dye anchored was found to decrease with increase in the dopant concentration. The dye-sensitized solar cells fabricated using the doped fibers, although with a nominally increased current density (JSC), have reduced efficiency due to lower fill factor and open circuit voltage (VOC). The electron diffusion coefficient (Dn) and mobility (μn) of the TiO2 and Nb:TiO2 NW in the presence of iodide/triiodide ions were an order of magnitude higher compared with the undoped samples. © 2010 The American Ceramic Society.
Source Title: Journal of the American Ceramic Society
URI: http://scholarbank.nus.edu.sg/handle/10635/85666
ISSN: 00027820
DOI: 10.1111/j.1551-2916.2010.04003.x
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

68
checked on Oct 15, 2018

WEB OF SCIENCETM
Citations

62
checked on Oct 8, 2018

Page view(s)

42
checked on Oct 12, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.