Dye-sensitized anodic TiO2 nanotubes

Macák, Jan M.; Tsuchiya, Hiroaki; Ghicov, Andrei; Schmuki, Patrik

doi:10.1016/j.elecom.2005.08.013

Cited by 392 publications

(259 citation statements)

References 18 publications

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“…In recent years considerable effort has been invested in improving the response of TNTs to visible light, mainly including the sensitization with dye [93,94] or polymer [95], loading with noble metal atom [96,97], and coupling with narrow band gap semiconductor [98,99]. In sensitized cases, charge injection from the CB of the narrowband gap semiconductor to that of TNTs can lead to efficient and longer charge separation by minimizing the electron-hole recombination.…”

Section: Surface Modification Of Tntsmentioning

confidence: 99%

Photocatalytical Properties of TiO<sub>2</sub> Nanotubes

Liang

Nowotny

2010

SSP

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Titanium dioxide (TiO 2 ) nanotubes have been reported one decade ago and have proven to be of a great interest in photocatalytic water splitting, as well as gas sensing and antibacterial/cancer treatment. This paper presents an overview on general preparation approaches (chemical treatment, template method and anodic oxidation) of tubular TiO 2 nanoarchitectures and their characterization. Current applications of the nanotubes as photocatalysts are also reviewed.

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Section: Surface Modification Of Tntsmentioning

confidence: 99%

Photocatalytical Properties of TiO<sub>2</sub> Nanotubes

Liang

Nowotny

2010

SSP

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“…[7][8][9] It is not surprising then, that several novel photoanode architectures with the prospect of rapid charge collection have recently been explored. 4,[10][11][12][13] Access to these architectures has been facilitated by several attractive fabrication strategies, among them (a) surfactant-controlled crystallization, 10,14 (b) controlled film corrosion, 15 and (c) templated atomic-layer deposition (ALD). 11,[16][17][18][19][20][21][22][23][24] Pseudo 1-D nanostructures, particularly with single or polycrystalline domains, are especially interesting since electrons traveling through the nanoparticle semiconductors are believed to move under diffusive control.…”

Section: Introductionmentioning

confidence: 99%

Electron Transport in Dye-Sensitized Solar Cells Based on ZnO Nanotubes: Evidence for Highly Efficient Charge Collection and Exceptionally Rapid Dynamics

et al. 2009

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Dye-sensitized solar cells based on ordered arrays of polycrystalline ZnO nanotubes, 64 µm in length, are shown to exhibit efficient electron collection over the entire photoanode array length. Electrochemical impedance spectroscopy, open-circuit photovoltage decay analysis, and incident-photon-to-current efficiency spectra are used to quantify charge transport and lifetimes. Despite the relatively thick photoanode, the charge extraction time is found to be faster than observed in traditional TiO 2 nanoparticle photoanodes. If the extraction dynamics are interpreted as diffusive, effective electron diffusion coefficients of up to 0.4 cm 2 s -1 are obtained, making these pseudo-1D photoanodes the fastest reported for an operating DSC to date. Rapid electron collection is of practical significance because it should enable alternative redox shuttles, which display relatively fast electron-interception dynamics, to be employed without significant loss of photocurrent.

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“…[7][8][9][10][11][12]. Numerous examples are available in the most recent literature where different supported 1D nanostructures are prepared by using wet chemical and electrochemical routes [13], vapour phase condensation methods (e.g. vapour-liquid-solid, VLS methods) [14], solution-phase methods [15], template directed synthesis [16] or other evaporation based approaches [17,18], etc.…”

Section: Introductionmentioning

confidence: 99%