Enhanced conversion efficiency in dye-sensitized solar cells based on bilayered nano-composite photoanode film consisting of TiO2 nanoparticles and nanofibers.

Enhanced conversion efficiency in dye-sensitized solar cells based on bilayered nano-composite photoanode film consisting of TiO2 nanoparticles and nanofibers.

Journal of nanoscience and nanotechnology (2014-04-18)

P F Du, L X Song, J Xiong

ZUSAMMENFASSUNG

Novel TiO2 nanoparticles/nanofibers (NPs/NFs) bilayered nano-composite photoanode film for dye-sensitized solar cells (DSSCs) was fabricated through the combination of spin-coating and electrospinning. The NPs and NFs layers have complementary roles. The underlaid spin-coated NPs layer provides the photoanode film with higher specific surface area for dye adsorption and improved adhesion to conductive glass substrate. The overlaid electrospun NFs layer endows the photoanode film with better dye-loading and light-harvesting capabilities due to its porous meshwork structure. And the NFs layer also offers larger pore volume, which can facilitate the electrolyte diffusion and the activity regeneration of dye sensitizers. As a result, the electron transport is accelerated while the charge recombination is suppressed. Ascribing to the synergic effect of the NPs and NFs layers, the TiO2 NPs/NFs-based DSSCs achieve a conversion efficiency of 4.46%, which is nearly 14% higher than that of the pure TiO2 NPs-based ones.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

718467

Sigma-Aldrich

Titan(IV)-oxid, nanopowder, 21 nm primary particle size (TEM), ≥99.5% trace metals basis

637254

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Titan(IV)-oxid, Anatase, nanopowder, <25 nm particle size, 99.7% trace metals basis

232033

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Titan(IV)-oxid, Anatase, powder, 99.8% trace metals basis

14021

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Titan(IV)-oxid, ReagentPlus^®, ≥99%

224227

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Titan(IV)-oxid, Rutil, powder, <5 μm, ≥99.9% trace metals basis

248576

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Titan(IV)-oxid, Anatase, powder, −325 mesh, ≥99% trace metals basis

637262

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Titan(IV)-oxid, Rutil, nanopowder, <100 nm particle size, 99.5% trace metals basis

634662

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Titan(IV)-oxid, Mischung aus Rutil und Anatas, nanopowder, <100 nm particle size (BET), 99.5% trace metals basis

366994

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Titan, powder, <45 μm avg. part. size, 99.98% trace metals basis

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Titan, foil, thickness 0.127 mm, 99.7% trace metals basis

267503

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700347

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268496

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204757

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204730

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Titan(IV)-oxid, Rutil, 99.995% trace metals basis

677469

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Titan(IV)-oxid, contains 1% Mn as dopant, nanopowder, <100 nm particle size (BET), ≥97%