Scattering spherical voids in nanocrystalline TiO2? enhancement of efficiency in dye-sensitized solar cells

Hore, Sarmimala; Nitz, Peter; Vetter, Carmen; Prahl, Christof; Niggemann, Michael; Kern, Rainer

doi:10.1039/b418658n

Cited by 287 publications

(228 citation statements)

References 11 publications

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“…4d). Apparently, the most complicated TNW-NS-NR architectures with multi-scale nature and interconnected network enable prominent optical confinement via multiple light reflections within the arrays and also are able to scatter the incident light of different wavelengths in the range of visible light 41,42 . This is conducive to extend the distance for light to travel within the photoelectrode, to induce more effective photon capturing in the visible region and thus resulting in an enhancement of light utilization efficiency 43 .…”

Section: Resultsmentioning

confidence: 99%

Maximizing omnidirectional light harvesting in metal oxide hyperbranched array architectures

et al. 2014

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The scrupulous design of nanoarchitectures and smart hybridization of specific active materials are closely related to the overall photovoltaic performance of an anode electrode. Here we present a solution-based strategy for the fabrication of well-aligned metal oxide-based nanowire-nanosheet-nanorod hyperbranched arrays on transparent conducting oxide substrates. For these hyperbranched arrays, we observe a twofold increment in dye adsorption and enhanced light trapping and scattering capability compared with the pristine titanium dioxide nanowires, and thus a power conversion efficiency of 9.09% is achieved. Our growth approach presents a strategy to broaden the photoresponse and maximize the light-harvesting efficiency of arrays architectures, and may lead to applications for energy conversion and storage, catalysis, water splitting and gas sensing.

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Section: Resultsmentioning

confidence: 99%

Maximizing omnidirectional light harvesting in metal oxide hyperbranched array architectures

et al. 2014

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“…Hore et al 14) recently showed that spherical voids in nanocrystalline TiO 2 films can be more efficient in lightscattering centers than solid-scattering centers. Use of hollow scattering centers can provide efficient paths for electrolyte penetration into the electrode film and result in an enhancement of photovoltaic performance by 25 %.…”

Section: 13)mentioning

confidence: 99%

Enhancement of Dye-Sensitized Solar Cell Efficiency by Spherical Voids in Nanocrystalline ZnO Electrodes

Hieu¹,

Dao²,

Vuong³

et al. 2014

Korean. J. Mater. Res.

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Light scattering enhancement is widely used to enhance the optical absorption efficiency of dye-sensitized solar cells. In this work, we systematically analyzed the effects of spherical voids distributed as light-scattering centers in photoanode films made of an assembly of zinc oxide nanoparticles. Spherical voids in electrode films were formed using a sacrificial template of polystyrene (PS) spheres. The diameter and volume concentration of these spheres was varied to optimize the efficiency of dye-sensitized solar cells. The effects of film thickness on this efficiency was also examined. Electrochemical impedance spectroscopy was performed to study electron transport in the electrodes. The highest power conversion efficiency of 4.07 % was observed with 12 µm film thickness. This relatively low optimum thickness of the electrode film is due to the enhanced light absorption caused by the light scattering centers of voids distributed in the film.

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“…This implies a very effective enhancement of the light collected into the cell, but also means that the DSC remains opaque. Nowadays, the scattering layers (Hore et al, 2006;Arakawa et al, 2006), centers (Hore et al, 2005) and superstructures (Chen et al, 2009;Q. F. Zhang et al, 2008) are well known and routinely used (Graetzel, 2005).…”

Section: Photon Managementmentioning

confidence: 99%

Dye Solar Cells: Basic and Photon Management Strategies

Dominici

Colonna²,

D’Ercole³

et al. 2011

Solar Cells - Dye-Sensitized Devices

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Scattering spherical voids in nanocrystalline TiO2? enhancement of efficiency in dye-sensitized solar cells

Cited by 287 publications

References 11 publications

Maximizing omnidirectional light harvesting in metal oxide hyperbranched array architectures

Maximizing omnidirectional light harvesting in metal oxide hyperbranched array architectures

Enhancement of Dye-Sensitized Solar Cell Efficiency by Spherical Voids in Nanocrystalline ZnO Electrodes

Dye Solar Cells: Basic and Photon Management Strategies

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