Efficiency of dye sensitized solar cells based on TiO2 nanotubes filled with nanoparticles

Alivov, Yahya; Fan, Zhaoyang

doi:10.1063/1.3202411

Cited by 68 publications

(42 citation statements)

References 11 publications

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“…Traditionally, the anode is composed of randomly packed TiO 2 nanoparticles (NPs) with particle sizes of 10-20 nm [5][6][7], which have an advantage of high surface to volume ratios. Nevertheless, the slow electron transport as well as the poor adhesion to substrate greatly limits the cell performance [8][9][10]. For instance, the NP film thickness is always no more than 20 lm.…”

Section: Introductionmentioning

confidence: 99%

Influence of annealing temperature on performance of dye-sensitized TiO2 nanorod solar cells

Zhao

2011

J Mater Sci: Mater Electron

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Single-crystal rutile TiO 2 nanorod (NR) arrays have been synthesized on the fluorine-doped tin oxide substrates, followed by an annealing at 200-600°C. It is found that DSSCs fabricated using TiO 2 NR arrays which undergo annealing display an increased efficiency than those that do not undergo annealing. The optimal efficiency of 4.42% power conversion is achieved in the DSSC made with 500°C annealed arrays, which show a 450% increase in the overall conversion efficiency. The improvement is ascribed to the increased light harvesting, the enhanced electric contact and the suppressed recombination of the injected electrons with redox species in the electrolyte.

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Section: Introductionmentioning

confidence: 99%

Influence of annealing temperature on performance of dye-sensitized TiO2 nanorod solar cells

Zhao

2011

J Mater Sci: Mater Electron

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“…The synthesis of ZnO nanostructures such as nanowires, nanorods, nanosheets, nanobelts and nanotubes is of particular interest because of their high porosity and large surface area, which are essential for optimized performance of dye sensitized solar cells, sensors and hydrogen devices [1][2][3][4][5][6]. Titania (TiO 2 ) is typically used as the photoanode material in DSSCs [7][8][9]. Gratzel's group successfully developed a DSSC with a high power conversion efficiency of about 10.4% using thick spin-coated nanoporous-TiO 2 films as photoelectrode [10].…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline zinc oxide thin films by novel double pulse single step electrodeposition

Sonavane¹,

Sharma²,

Im³

et al. 2010

Journal of Alloys and Compounds

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“…10 TiO 2 NT arrays in particular, due to the highly ordered, closely packed, and vertically * Author to whom correspondence should be addressed. aligned tubular geometry and the resulted 1-diemensional (1-D) charge carrier transport, have drawn attention for photovoltaic 11 and photocatalytic applications. TiO 2 NTs have been reported through many preparation methods including templates based on nanoporous alumina, 12 hydrothermal techniques, 13 sol-gel template method, 14 seed growth method 15 and electrochemical anodization.…”

Section: Introductionmentioning

confidence: 99%

TiO<SUB>2</SUB> Nanostructures by Electrochemical Anodization for Dye-Sensitized Solar Cells

Pan¹,

Zhao²,

Fan³

2012

Nanosci Nanotechnol Lett

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Highly ordered TiO 2 nanotube (NT) array can be formed by electrochemical anodic oxidation process in fluoride-containing electrolyte. The NT length, diameter, and wall thickness can be tailored by controlling the anodization process. Its facile fabrication, relatively large surface area, and especially the 1-D charge carrier transport property of the tubular geometry, have drawn intensive interest in using NT array for TiO 2 photovoltaic and photocatalysis applications. In this article, we briefly review our recent works in the study of TiO 2 NT array fabrication by anodic oxidation, and their application for dye-sensitized solar cells. The effects of anodic voltage and fluorine concentration in the electrolyte were investigated to achieve highly ordered TiO 2 NTs. With controlled tubular pore diameter, TiO 2 NTs of different tube length were obtained by varying the growth time. Dye sensitized solar cells were subsequently fabricated using NTs and current-voltage characteristics were tested for comparison. It was found that photoelectrons in NTs has long diffusion length for charge collection, and the overall energy conversion efficiency is dependent on the tube length due to limited dye loading. To further improve the efficiency through enhanced light harvesting, mixed NT and nanoparticle (NP) structures were studied by embedding NPs into nanotubes through infiltration process. The mixed structures exploit the combined benefits of large surface area of NPs for high dye-loading and light harvesting, and the fast electron transport in the 1-D NTs for high electron collection efficiency. The result is improved solar energy conversion efficiency. The kinetics of charge transfer and recombination was also investigated via electrochemical impedance spectroscopy to determine the efficiency limited by charge collection or by light harvesting.

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Efficiency of dye sensitized solar cells based on TiO2 nanotubes filled with nanoparticles

Cited by 68 publications

References 11 publications

Influence of annealing temperature on performance of dye-sensitized TiO2 nanorod solar cells

Influence of annealing temperature on performance of dye-sensitized TiO2 nanorod solar cells

Nanocrystalline zinc oxide thin films by novel double pulse single step electrodeposition

TiO<SUB>2</SUB> Nanostructures by Electrochemical Anodization for Dye-Sensitized Solar Cells

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