Performance of dye-sensitized solar cell based on nanocrystals TiO2 film prepared with mixed template method

Jiu, Jinting; Wang, Fumin; Sakamoto, Masaru; Takao, Jun; Adachi, Motonati

doi:10.1016/j.solmat.2004.06.011

Cited by 38 publications

(21 citation statements)

References 17 publications

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“…The microstructure parameters, such as porosity, pore size, TiO 2 particle size, and roughness factor, have significant effects on the electron lifetime, electron diffusion coefficient, specific surface area, as well as light absorption coefficient, resulting in apparent difference in the cell performance (Park et al, 1999;van de Lagemaat et al, 2001;Benkstein et al, 2003;Nakade et al, 2003;Cass et al, 2005). Therefore, it is important to be able to model the performance of a DSSC with respect to the microstructure of its electrode (Park et al, 1999;Srikanth et al, 2001;Lindstrom et al, 2002;Nakade et al, j 40 j THE CANADIAN JOURNAL OF CHEMICAL ENGINEERING j j VOLUME 86, FEBRUARY 2008 j 2003; Saito et al, 2004;Jiu et al, 2005). Previously, an extended diffusion model has been used to study the porosity effect on the DSSC performance (Ni et al, 2006b).…”

Section: Comparison With Published Experimental Datamentioning

confidence: 99%

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Theoretical modelling of the electrode thickness effect on maximum power point of dye‐sensitized solar cell

Leung

2008

Can J Chem Eng

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The maximum power point (MPP) of a dye‐sensitized solar cell (DSSC) is often more important than the open‐circuit voltage and the short‐circuit current as MPP better represents the DSSC power output and energy conversion efficiency. In this investigation, the DSSC J–V characteristics and MPP were studied using a simple theoretical electron diffusion model. Parametric analyses were performed to determine the particular effect of electrode thickness on the MPP output. The analytical results are well consistent with the experimental results published in the literature. In the optimization analysis, it was specially found that the optimal electrode thickness for the highest MPP is rather insensitive to the operating conditions. It implies that an optimally designed DSSC can be always operated at its highest MPP regardless of any geographical, seasonal, and solar hour factors. Such an important attribute facilitates the design and manufacture of DSSC for worldwide commercialization at competitive costs.

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Section: Comparison With Published Experimental Datamentioning

confidence: 99%

“…; Saito et al, 2004;Jiu et al, 2005). Previously, an extended diffusion model has been used to study the porosity effect on the DSSC performance (Ni et al, 2006b).…”

mentioning

confidence: 99%

Theoretical modelling of the electrode thickness effect on maximum power point of dye‐sensitized solar cell

Leung

2008

Can J Chem Eng

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“…[6] It will be seen that indeed LSEs do increase cell efficiency by an important percentage, however, this increase should be appreciated by also taking into account the disadvantages related with the loss of transparency. The cell described in the following paragraphs is made by using a titania electrode that consists of two layers: a rough nanocrystalline titania film making a light-scattering layer and a compact nanocrystalline titania layer filling the voids and standing on the top of the lower layer.…”

Section: By Elias Stathatos and Panagiotis Lianos*mentioning

confidence: 97%

Increase of the Efficiency of Quasi‐Solid State Dye‐Sensitized Solar Cells by a Synergy between Titania Nanocrystallites of Two Distinct Nanoparticle Sizes

Σταθάτος

Lianos

2007

Advanced Materials

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Nanocrystalline titanium dioxide electrodes are standard choice for the construction of Dye-sensitized Solar Cells (DSC). Nanocrystallinity, small number of defect sites, optimized electrical conduct between nanoparticles and sufficient active surface area are crucial factors, which determine the quality of the electrodes and, subsequently, the overall efficiency of the cell. The maximum efficiency of DSC ever reported [1] was around 10.4 % and referred to cells based on a liquid electrolyte and on non-transparent Light-Scattering Electrodes (LSE) of 18mm thickness. For several years, we have made efforts to reach comparable cell efficiencies with DSC's employing thinner transparent TiO 2 electrodes by optimizing the synthesis and deposition procedures. The motive of these efforts is related with the prospect of utilizing such transparent cells as photovoltaic windows. LSEs do not offer this possibility but, instead, they entrap light and result in higher cell efficiencies. In order for Transparent Electrodes (TE) to reach performance of LSE, it is necessary that the former are deposited with optimized parameters: good quality nanocrystals without defects, compact enough films to allow sufficient electric contact between nanoparticles and sufficient mesoporosity to allow dye-sensitizer and electrolyte filling. We have achieved this goal by synthesizing titania through the sol-gel procedure in the presence of surfactant templates under ambient conditions. Spatially isolated self-organized entities seem to encourage formation of good quality nanosrystalline particles. For example, reverse micelles dispersed in an organic solvent, originally used to synthesize CdS nanocrystals [2] proved excellent templates for TiO 2 nanocrystals as well.[3] However, reverse micelles are rather costly and less environmentally friendly systems. It has been found that simpler systems can offer similar results and more handy experimental procedures. Thus organic acid solvolysis of titanium isopropoxide in the presence of the non-ionic surfactant Triton X-100 (polyoxyethylene-(10) isooctylphenyl ether), can assist nanocrystalline anatase deposition [4] with nanoparticle size of around 12 nm and active surface area around 110 m 2 g -1 . About 2 lm thick TE were made by subsequent layer deposition by dipping under ambient conditions. Organic acid solvolysis in the absence of water has the advantage of slow sol-gel evolution that allows surfactant assembling and shell formation around titania core. The choice of this route was rewarding. Indeed, as it has been previously reported, [4] such electrodes gave DSCs with efficiency > 9 %, i.e., not far from the reported maximum. The DSC of ref.[ When the same electrodes were used to construct quasi-solid state DSCs, where the redox couple I 3 -/I -was incorporated into a sol-gel nanocomposite organic-inorganic gel, efficiency dropped [5] but it was still at satisfactory levels of 5.3 %. This efficiency decrease was due to current decrease, which in turn was due to lower ionic mobility in the gel...

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“…[5][6][7][8][9] Several methods have been tried to obtain porous structures of TiO 2 , including various combinations of sol-gel chemistry and templating techniques. [10][11][12][13][14][15][16][17][18][19] In earlier work of our research group, we demonstrated a simple mixing-casting method to obtain templated TiO 2 with improved film quality. 9,20 The method provided interpenetrating macropore channels as well as a mesoporous TiO 2 network which showed improved solarcell efficiency.…”

Section: Introductionmentioning

confidence: 99%

Clustering effects in solution‐based nanoparticle/template hybrid coatings

Phadke¹,

Stanley²,

Sorge³

et al. 2007

J Soc Info Display

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Templating processes with monodisperse polystyrene particles are being explored for a number of application areas, especially in microelectronics and optics. Classically, these depend on rather slow-drying steps that allow for the polystyrene particles to gradually situate themselves into ordered arrays and patterns. On the other hand, many manufacturing processes are designed to operate much more rapidly (spin-coating, roll-coating, spray-coating, etc.). The present work investigates the behavior of nanoparticle(titania)-microparticle (polystyrene) hybrid solutions when processed with these rapid techniques. Very thin coatings were examined where the larger-template particle-particle interactions can be quantifiably observed and measured. This gives us insight into the conditions when structural order might be achievable in materials systems using these rapid, industrially important, coating techniques. The specific system that was investigated involves nanoscale titanium dioxide particles combined with monodisperse micron-scale polystyrene template particles aimed at building flexible dye-sensitized solar cells. For this application, the formation of strong physical networks of titanium dioxide nanoparticles with percolating interparticle channels for the electrolyte phase to reach all surfaces where dye molecules will reside is required.

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Performance of dye-sensitized solar cell based on nanocrystals TiO2 film prepared with mixed template method

Cited by 38 publications

References 17 publications

Theoretical modelling of the electrode thickness effect on maximum power point of dye‐sensitized solar cell

Theoretical modelling of the electrode thickness effect on maximum power point of dye‐sensitized solar cell

Increase of the Efficiency of Quasi‐Solid State Dye‐Sensitized Solar Cells by a Synergy between Titania Nanocrystallites of Two Distinct Nanoparticle Sizes

Clustering effects in solution‐based nanoparticle/template hybrid coatings

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