A facile route to vertically aligned electrospun SnO 2 nanowires on a transparent conducting oxide substrate for dye-sensitized solar cells
Publication Type:Journal Article
Source:Journal of Materials Chemistry, Volume 22, Number 5, p.2166-2172 (2012)
Keywords:Average diameter, Conversion efficiency, Dye-Sensitized solar cell, Electrospinning, Electrospinning method, Electrospuns, Large-scale production, Nanofibers, Nanowires, Nozzles, Open Circuit Voltage, Photoelectrochemical cells, Power conversion efficiencies, Production rates, Rotating drums, Single nozzle, Solar cells, Spatial orientations, Substrates, Transparent conducting oxide, Vertically aligned, Well-aligned, Working electrode
We demonstrate a large-scale production of aligned SnO 2 nanofibers with a multi-nozzle electrospinning method combined with an air-shield enclosed rotating drum collector. The production rate by this multi-nozzle approach is several times higher than that of the single-nozzle electrospinning. The nanofibers produced were having a short range of diameters similar to the case of nanofibers produced by single nozzle electrospinning. The well-aligned nanofibers are subsequently processed into vertically oriented SnO 2 nanowires on an FTO substrate. The average diameter and length of the wires were 75 ± 25 nm and 19 ± 2 μm, respectively. Dye-sensitized solar cells using this nanostructured material as the working electrode yielded a short-circuit current density (J sc) of 9.9 mA cm -2 (which is 42% higher than that achieved by nanowires produced by other methods), an open-circuit voltage (V oc) of 0.525 V and a power conversion efficiency (η) of 2.53%. We believe that improvement of the multi-nozzle electrospinning is highly promising for commercialization due to simplicity and easiness of fabricating the spinneret, control over the diameter and spatial orientation of the fibers. © 2012 The Royal Society of Chemistry.
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