Please use this identifier to cite or link to this item: https://doi.org/10.1111/j.1551-2916.2010.04003.x
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dc.titleStructural and electrical properties of Nb-doped anatase TiO2 nanowires by electrospinning
dc.contributor.authorArchana, P.S.
dc.contributor.authorJose, R.
dc.contributor.authorJin, T.M.
dc.contributor.authorVijila, C.
dc.contributor.authorYusoff, M.M.
dc.contributor.authorRamakrishna, S.
dc.date.accessioned2014-10-07T09:10:43Z
dc.date.available2014-10-07T09:10:43Z
dc.date.issued2010-12
dc.identifier.citationArchana, 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
dc.identifier.issn00027820
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/85666
dc.description.abstractOne-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.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1111/j.1551-2916.2010.04003.x
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentNUS NANOSCIENCE & NANOTECH INITIATIVE
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1111/j.1551-2916.2010.04003.x
dc.description.sourcetitleJournal of the American Ceramic Society
dc.description.volume93
dc.description.issue12
dc.description.page4096-4102
dc.identifier.isiut000284849300030
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