Layer-by-layer TiO2 films as efficient blocking layers in dye-sensitized solar cells

Patrocínio, Antonio Otávio T.; Paterno, Leonardo G.; Iha, Neyde Yukie Murakami

doi:10.1016/j.jphotochem.2009.04.008

Cited by 85 publications

(71 citation statements)

References 44 publications

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“…The glass plates with the ITO transparent electrode were dip-coated 3 times with the S0 and then heated at 500ºC for 30 min in order to prepare the anatase-type titania electrodes. This layer plays the role as a blocking layer in order to suppress the charge recombination at the interface between the upper layer and the ITO layer (Cameron and Peter, 2003;Hart et al, 2006;Patrocinio et al, 2009). These electrodes were dip-coated 5 times with the S0 containing 0%, 0.10%, 1.0%, and 10% allophane and then steam-treated at 100°C for 120 min.…”

Section: Sample Preparationmentioning

confidence: 99%

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

Nishikiori

Kanada

Setiawan

et al. 2015

Applied Clay Science

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Dye-dispersing allophane-titania composite electrodes were prepared from titanium alkoxide sols containing dye and allophane. The photoelectric conversion properties of the electrodes were investigated by photoelectrochemical measurements. The photocurrent values in the UV range decreased with an increase in the allophane content, whereas those in the visible range were increased by adding 1.0% (Al/Ti ratio) allophane. As a small amount of allophane nanoparticles were highly dispersed in the titania electrodes, the dye molecules were dispersed in the electrodes without decreasing the efficiency of the electron injection from the dye to the titania conduction band. The dye molecules dispersed on the titania nanoparticle surface were capped with allophane nanoparticles which prevented desorption. The dye molecules strongly interacted with the titania nanoparticle surface and efficiently injected the excited electrons into the titania conduction band.

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Section: Sample Preparationmentioning

confidence: 99%

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

Nishikiori

Kanada

Setiawan

et al. 2015

Applied Clay Science

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“…Although not previously reported as blocking layers, LbL metal oxide films have been applied in several devices (Krogman et al, 2008;Srivastava & Kotov, 2008;Jia et al, 2008;Lu et al, 2009b), including DSCs (Tsuge et al, 2006;Agrios et al, 2006). Iha and coworkers have shown that an LbL film based on TiO 2 nanoparticles and sodium sulphonated polystyrene, PSS, applied onto the FTO substrate before the mesoporous TiO 2 layer improved the overall conversion efficiency of DSCs by 28% (Patrocinio et al, 2009). …”

Section: Dye-sensitized Solar Cells (Dsscs)mentioning

confidence: 99%

Potential Applications for Solar Photocatalysis: From Environmental Remediation to Energy Conversion

Machado¹,

Santos²,

Borges³

et al. 2012

Solar Radiation

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“…The charge recombination is a common process in DSCs, which limits their performance and mainly takes place at the TiO 2 /sensitizer and TCO/TiO 2 interfaces. 9 The kinetic features of the charge transfer processes in DSCs demonstrate that charge recombination at the TiO 2 /sensitizer interface is negligible. The charge recombination at the TCO/TiO 2 interface occurs due to the physical contact between the electrolyte and the TCO surface.…”

Section: Introductionmentioning

confidence: 96%

The Effect of a Sol-gel Formed TiO₂Blocking Layer on the Efficiency of Dye-sensitized Solar Cells

Cho¹,

Yoon²,

Sekhon³

et al. 2011

Bulletin of the Korean Chemical Society

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The effect of a dense TiO 2 blocking layer prepared using the sol-gel method on the performance of dyesensitized solar cells was studied. The blocking layer formed directly on the working electrode, separated it from the electrolyte, and prevented the back transfer of electrons from the electrode to the electrolyte. The dyesensitized solar cells were prepared with a working electrode of fluorine-doped tin oxide glass coated with a blocking layer of dense TiO 2 , a dye-attached mesoporous TiO 2 film, and a nano-gel electrolyte, and a counter electrode of Pt-deposited FTO glass. The gel processing conditions and heat treatment temperature for blocking layer formation affected the morphology and performance of the cells, and their optimal values were determined. The introduction of the blocking layer increased the conversion efficiency of the cell by 7.37% for the cell without a blocking layer to 8.55% for the cell with a dense TiO 2 blocking layer, under standard illumination conditions. The short-circuit current density (J sc ) and open-circuit voltage (V oc ) also were increased by the addition of a dense TiO 2 blocking layer.

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Layer-by-layer TiO2 films as efficient blocking layers in dye-sensitized solar cells

Cited by 85 publications

References 44 publications

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

Potential Applications for Solar Photocatalysis: From Environmental Remediation to Energy Conversion

The Effect of a Sol-gel Formed TiO₂Blocking Layer on the Efficiency of Dye-sensitized Solar Cells

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Layer-by-layer TiO2 films as efficient blocking layers in dye-sensitized solar cells

Cited by 85 publications

References 44 publications

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

Potential Applications for Solar Photocatalysis: From Environmental Remediation to Energy Conversion

The Effect of a Sol-gel Formed TiO2Blocking Layer on the Efficiency of Dye-sensitized Solar Cells

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The Effect of a Sol-gel Formed TiO₂Blocking Layer on the Efficiency of Dye-sensitized Solar Cells