Effect of TiO2 electrode thickness on photovoltaic properties of dye sensitized solar cell based on randomly oriented Titania nanotubes

Mathew, Ambily; Rao, G. Mohan; Munichandraiah, N.

doi:10.1016/j.matchemphys.2011.01.032

Cited by 46 publications

(18 citation statements)

References 31 publications

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“…I sc reached its peak value at the amount of dyes adsorbed corresponding to a film thickness of ~12 μm; further increase in dyes adsorbed accompanied a decrease in I sc . This finding is in a good agreement with the literature, the optimum film thickness is 10 ~ 15 μm [11]. It is generally accepted that the electrons generated by dye molecules through the capturing the photons, after injected to titania network can only diffuse a nominal distance of 10-15 μm.…”

Section: Measurements and Characterizationsupporting

confidence: 91%

“…The inherent huge surface and defects including the grain boundaries between adjacent nanocrystals may all raise electron scattering within the mesoporous TiO 2 film. This effect gets more pronounced with thick film to reduce the electronic transport property of the TiO 2 film and, consequently lead to reduced I sc and ff [14].…”

Section: Influence Of Tio 2 Film On I Scmentioning

confidence: 99%

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An Exploratory Study on TiO2 Film Thickness Related Photocurrent Decreasing in Dye-sensitized Solar Cells

Zheng¹,

Wang²,

Tang³

2014

Proceedings of the 2015 International Conference on Material Science and Applications

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Abstract. This paper studies the effects of titanium dioxide films with different thickness on the photocurrent. The results show that titanium dioxide itself is not able to reduce Isc as long as the film thickness is less than 50μm-100μm (the electron diffusion length).The real factors affecting the photocurrent is the number of photoelectrons which could be injected into the TiO 2 conduction band generated by dye adsorped on the surface of TiO 2 . The thickness of the film provides a huge space for the dye molecules, but dye molecules quenching might play an important role to prevent the photoelectrons from injecting into the conducting band of TiO 2 . The improvement mechanism of Isc was discussed and an intriguing approach to enhance Isc was addressed.

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Section: Measurements and Characterizationsupporting

confidence: 91%

Section: Influence Of Tio 2 Film On I Scmentioning

confidence: 99%

An Exploratory Study on TiO2 Film Thickness Related Photocurrent Decreasing in Dye-sensitized Solar Cells

Zheng¹,

Wang²,

Tang³

2014

Proceedings of the 2015 International Conference on Material Science and Applications

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“…A typical DSSC consists of a nanoporous metal oxide film such as TiO 2 , sensitizing dye, redox electrolyte and a counter electrode (O'Regan et al, 1991). The metal oxide film plays a major role in the enhancement of power conversion efficiency of DSSCs and many studies have been focused on the dependence of cell efficiency on film structure and thickness (Kang et al, 2004, Mathew et al, 2011, Kao et al, 2009. A significantly higher power conversion efficiency and incident photon to current conversion efficiency (IPCE) can be expected using TiO 2 photoanode with optimized film thickness, better crystallization and optimized microstructure.…”

Section: Introductionmentioning

confidence: 99%

The effect of TiO2 photo anode film thickness on photovoltaic properties of dye-sensitized solar cells

et al. 2016

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Nanocrystalline titanium dioxide (TiO 2 ) photoanodes with four different film thicknesses from 5.57µm to 20.65µm were prepared by doctor-blade technique. Performance of dye sensitized solar cells (DSSCs) fabricated with these photoanodes were studied using current-voltage characteristics and incident photon-to-current conversion efficiency (IPCE) measurements. Electrochemical impedance spectroscopy (EIS) was used to analyze the effect of TiO 2 film thickness on the charge transfer resistance and electron life time in the solar cells. Voltage decay measurements were used to study the recombination process of photo generated charge carriers. These studies revealed that the photovoltaic properties of DSSCs largely depend on the film thickness of TiO 2 photoanode. Further, the DSSCs fabricated using a TiO 2 film of 12.73 µm thickness exhibited the best photovoltaic performance with highest incident photon-to-current conversion efficiency, highest short-circuit photocurrent, lowest charge transfer resistance, highest electron life time and lowest recombination life time.

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“…8,[18][19][20] Current densities will increase along with the film thickness due to higher dye loading leading to more photogenerated carriers. 8,[18][19][20] Current densities will increase along with the film thickness due to higher dye loading leading to more photogenerated carriers.…”

mentioning

confidence: 99%

Photoanode Area Dependent Efficiency and Recombination Effects in Dye-Sensitized Solar Cells

Vendra

Absher

Ellis

et al. 2012

J. Electrochem. Soc.

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Efficiency and electron lifetimes in dye-sensitized solar cells (DSCs) fabricated from P25 titania nanoparticles were found to be strongly dependent on the photoanode area. Tin oxide nanowires, which already exhibit higher electron lifetimes than titania nanoparticles, also showed similar behavior. Most importantly, DSCs fabricated from these materials exhibited a non-uniform photovoltage profile laterally across photoanode for areas as large as 1 cm 2 . The non-uniformity in photopotential distribution is enhanced with a reduction in the photoanode area indicating edge effects at smaller areas. Dye desorption from the edges of the photoanode into the liquid electrolyte results in these edge effects and can play an important role in characterizing the DSC performance. Interestingly, DSCs made using anatase nanoparticles exhibiting strong dye adsorption showed a uniform photopotential along the lateral dimension of the photoanode. Further, P25 nanoparticles based DSCs showed no spatial photopotential variation when infiltrated with a solid state electrolyte indicating that dye desorption from the nanoparticle or nanowire surfaces is a crucial factor contributing to edge effects. Mapping the photopotential distribution is a valuable tool to understand and characterize edge effects in DSCs.

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Effect of TiO2 electrode thickness on photovoltaic properties of dye sensitized solar cell based on randomly oriented Titania nanotubes

Cited by 46 publications

References 31 publications

An Exploratory Study on TiO2 Film Thickness Related Photocurrent Decreasing in Dye-sensitized Solar Cells

An Exploratory Study on TiO2 Film Thickness Related Photocurrent Decreasing in Dye-sensitized Solar Cells

The effect of TiO2 photo anode film thickness on photovoltaic properties of dye-sensitized solar cells

Photoanode Area Dependent Efficiency and Recombination Effects in Dye-Sensitized Solar Cells

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