An Interfacial and Bulk Charge Transport Model for Dye-Sensitized Solar Cells Based on Photoanodes Consisting of Core–Shell Nanowire Arrays

Hill, Justin J.; Banks, Nick; Haller, Kelly; Orazem, Mark E.; Ziegler, Kirk J.

doi:10.1021/ja2044216

Cited by 33 publications

(26 citation statements)

References 37 publications

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“…62 The findings reported here do not contradict that work. Instead, the modeling results and the apparent high internal quantum yields measured experimentally in this work indicate that carrier drift within a semiconductor electrode can ameliorate the operation of sensitized systems in systems with 'suboptimal' rates for relevant chemical processes.…”

Section: Journal Of the American Chemical Societysupporting

confidence: 62%

Dye-Sensitized Photocathodes: Efficient Light-Stimulated Hole Injection into p-GaP Under Depletion Conditions

Chitambar¹,

Wang²,

Liu

et al. 2012

J. Am. Chem. Soc.

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The steady-state photoelectrochemical responses of p-GaP photoelectrodes immersed in aqueous electrolytes and sensitized separately by six triphenylmethane dyes (rose bengal, rhodamine B, crystal violet, ethyl violet, fast green fcf, and brilliant green) have been analyzed. Impedance measurements indicated that these p-GaP(100) photoelectrodes operated under depletion conditions with an electric field of ∼8.5 × 10(5) V cm(-1) at the p-GaP/solution interface. The set of collected wavelength-dependent quantum yield responses were consistent with sensitization occurring specifically from adsorbed triphenylmethane dyes. At high concentrations of dissolved dye, the measured steady-state photocurrent-potential responses collected at sub-bandgap wavelengths suggested unexpectedly high (>0.1) net internal quantum yields for sensitized hole injection. Separate measurements performed with rose bengal adsorbed on p-GaP surfaces pretreated with (NH(4))(2)S verified efficient sensitized hole injection. A modified version of wxAMPS, a finite-difference software package, was utilized to assess key operational features of the sensitized p-GaP photocathodes. The net analysis showed that the high internal quantum yield values inferred from the experimental data were most likely afforded by the internal electric field present within p-GaP, effectively sweeping injected holes away from the interface and minimizing their participation in deleterious pathways that could limit the net collection yield. These simulations defined effective threshold values for the charge carrier mobilities (≥10(-6) cm(2) V(-1) s(-1) and ≥10(-1) cm(2) V(-1) s(-1) at dopant densities of 10(18) and 10(13) cm(-3), respectively), hole injection rate constants (≥10(12) s(-1)), and surface trap densities (10(12) cm(-2)) needed to attain efficient hole collection with the quality of p-GaP materials used here. The cumulative experimental and modeling data thus provide insight on design strategies for assembling new types of dye-sensitized photocathodes that operate under depletion conditions.

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Section: Journal Of the American Chemical Societysupporting

confidence: 62%

Dye-Sensitized Photocathodes: Efficient Light-Stimulated Hole Injection into p-GaP Under Depletion Conditions

Chitambar¹,

Wang²,

Liu

et al. 2012

J. Am. Chem. Soc.

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“…Nowadays, even more advanced geometries of TiO 2 nanotubes can be prepared by different methods [44,[59][60][61][62][63]. For example, Zheng et al reported the influence of hierarchical structures, constructed via layerby-layer assembly of self-standing titania nanotube arrays and nanoparticles, upon charge recombination and photoelectric performance of front-illuminated DSCs [64].…”

Section: Tio 2 Nanotubes Filmsmentioning

confidence: 99%

Titania Nanostructures for Dye-sensitized Solar Cells

2012

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Abstract:Titania is one kind of important materials, which has been extensively investigated because of its unique electronic and optical properties. Research efforts have largely focused on the optimization of the dye, but recently the titania nanostructures electrode itself has attracted more attention. It has been shown that particle size, shape, crystallinity, surface morphology, and chemistry of the TiO2 material are key parameters which should be controlled for optimized performance of the solar cell. Titania can be found in different shape of nanostructures including mesoporous, nanotube, nanowire, and nanorod structures. The present article reviews the structural, synthesis, electronic, and optical properties of TiO2 nanostructures for dye sensitized solar cells.

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“…It’s mainly used in the window material of photoelectric devices, such as light-emitting diodes (LED) 1 , solar cells 2, 3 , flat panel displays 4 , etc. Indium-tin-oxide (ITO) and doped zinc oxide (ZnO) are the most widely used and studied in recent years.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and application of indium-tin-oxide nanowire networks by polystyrene-assisted growth

Yun

et al. 2017

Sci Rep

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The fabrication and application of polystyrene (PS)-assisted ITO nanowire (NW) networks are reported. The ITO-NW networks are fabricated by means of electron-beam deposition via PS. This method has the advantages of low-temperature (~300 °C), low-cost, facile and efficient operation. The growth mechanism of PS-assisted ITO NWs was analyzed in detail, and the morphology of which could be regulated by the size of PS. X-ray diffraction and high-resolution transmission electron microscope show that the ITO NWs are close to an integral cubic lattice. The transmittance of ITO-NW networks layer is above 90% after 400 nm and the sheet resistance is ~200 Ω/□. When they applied on vertical blue and green LEDs, the light output power all has been improved ~30%. And, the resistive switching behaviors of ITO-NWs were measured and analyzed in Ag/ITO-NW networks/Al capacitor. The application of ITO-NW networks on special morphological devices was discussed. The PS-assisted ITO-NW networks show a strong researching and application value.

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An Interfacial and Bulk Charge Transport Model for Dye-Sensitized Solar Cells Based on Photoanodes Consisting of Core–Shell Nanowire Arrays

Cited by 33 publications

References 37 publications

Dye-Sensitized Photocathodes: Efficient Light-Stimulated Hole Injection into p-GaP Under Depletion Conditions

Dye-Sensitized Photocathodes: Efficient Light-Stimulated Hole Injection into p-GaP Under Depletion Conditions

Titania Nanostructures for Dye-sensitized Solar Cells

Fabrication and application of indium-tin-oxide nanowire networks by polystyrene-assisted growth

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