Effects of water-based gel electrolyte on the charge recombination and performance of dye-sensitized solar cells

Mozaffari, Samaneh; Nateghi, Mohammad Reza; Borhanizarandi, Mahmood

doi:10.1007/s10008-014-2508-x

Cited by 24 publications

(6 citation statements)

References 46 publications

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“…309 With the aim of confirming the practical application of such an approach in an aqueous environment, Nateghi and coworkers prepared a gel-polymer electrolyte consisting of poly(vinylpyrrolidone) (PVPi, M n = 40 000, 2 wt%), PEG 400 4 wt%, KI 0.20 M and I 2 40 mM in ACN/H 2 O. 310 The effect of water concentration on the polyiodide formation was investigated by analyzing the intensity ratio between the polyiodide (I n À ) and the I 3 À species: a decrease of the I n À /I 3 À ratio occurred upon water addition. Theoretical calculations indicated that I n À species were more effective electron acceptors than I 3 À due to more delocalized charges.…”

Section: Gel-polymer Aqueous Electrolytesmentioning

confidence: 99%

“…Obviously, aqueous electrolytes being a recent Table 14 Structural formulas of sensitizers usually employed in aqueous DSSCs, together with the redox pairs with which were coupled. Further details about the other cell components and the PV performance are reported in the manuscript and in Table 20 Always with I À /I 3 À with increasing H 2 O content: 0.018 wt%, 172 4 wt%, 156 10 wt%, 145 65 wt%, 138 and in 100 wt% H 2 O 138,163,206 Always with I À /I 3 À with increasing H 2 O content: 3 wt%, 124 4 wt%, 43 5 wt%, 303 10 wt%, 294 65 wt%, 138,203 and in 100 wt% H 2 O 138,328 Always with I À /I 3 À with increasing H 2 O content: 10 wt%, 128 50 wt%, 310 and in 100 wt% H 2 O 206 Always with I À /I 3 À with increasing H 2 O content: 20 wt%, 120 50 wt%, 318 research interest, very few literature reports useful to identify an optimum cathodic material have been available so far. Notwithstanding, some interesting studies have been already proposed, which will be hereby briefly summarised.…”

Section: Low-cost and Water-compatible Cathodesmentioning

confidence: 99%

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Aqueous dye-sensitized solar cells

et al. 2015

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Nowadays, dye-sensitized solar cells (DSSCs) are the most extensively investigated systems for the conversion of solar energy into electricity, particularly for implementation in devices where low cost and good performance are required. Nevertheless, a key aspect is still to be addressed, being considered strongly harmful for a long time, which is the presence of water in the cell, either in the electrolyte or at the electrode/electrolyte interface. Here comes the present review, in the course of which we try our best to address the highly topical role of water in DSSCs, trying to figure out if it is a poisoner or the keyword to success, by means of a thoroughly detailed analysis of all the established phenomena in an aqueous environment. Actually, in the last few years the scientific community has suddenly turned its efforts in the direction of using water as a solvent, as demonstrated by the amount of research articles being published in the literature. Indeed, by means of DSSCs fabricated with water-based electrolytes, reduced costs, non-flammability, reduced volatility and improved environmental compatibility could be easily achieved. As a result, an increasing number of novel electrodes, dyes and electrolyte components are continuously proposed, being highly challenging from the materials science viewpoint and with the golden thread of producing truly water-based DSSCs. If the initial purpose of DSSCs was the construction of an artificial photosynthetic system able to convert solar light into electricity, the use of water as the key component may represent a great step forward towards their widespread diffusion in the market.

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Section: Gel-polymer Aqueous Electrolytesmentioning

confidence: 99%

Section: Low-cost and Water-compatible Cathodesmentioning

confidence: 99%

Aqueous dye-sensitized solar cells

et al. 2015

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“…The optimization was performed in an aqueous electrolyte because of the need to avoid desorption of Z907 and the optimized condition subsequently used for the organic electrolyte ( Bella et al, 2015 ). Polyethylene glycol was used in the aqueous electrolyte system as a binder ( Mozaffari et al, 2014 ).…”

Section: Resultsmentioning

confidence: 99%

Preliminary Investigation on Vacancy Filling by Small Molecules on the Performance of Dye-Sensitized Solar Cells: The Case of a Type-II Absorber

et al. 2021

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The steric shielding offered by sensitizers on semiconducting surfaces as a result of branching in the dyes used offers the less utilization of semiconducting substrate sites during device fabrication in dye-sensitized solar cells (DSSCs). This work proposes a strategy to increase the coverage through the utilization of small molecules which have the ability to penetrate into the sites. The small molecules play the dual role of vacancy filling and sensitization, which can be viewed as an alternative to co-sensitization also. Hence, we show for the first time ever that the co-adsorption of catechol with Z907 as a sensitizer enhances the electron density in the photo-anode by adsorbing on the vacant sites. Catechol was subsequently adsorbed on TiO2 after Z907 as it has a stronger interaction with TiO2 owing to its favorable thermodynamics. The reduced number of vacant sites, suppressed charge recombination, and enhanced spectral response are responsible for the improvement in the PCEs. Quantitatively, both organic and aqueous electrolytes were used and the co-sensitized DSSCs had PCE enhancements of 7.2 and 60%, respectively, compared to the control devices.

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“…Moreover, PAA is used to absorb large amounts of liquid electrolyte acting as electrical functional groups. However, moisture is one of the parameters that suppress current density ( J sc ), as it can detach absorbed dye, small generation of polyiodides, and iodine bleach, causing decreases in current density ( J sc ), conversion efficiency ( η ), and long term stability .…”

Section: Introductionmentioning

confidence: 99%

Polymer electrolyte developed from natural rubber‐polyacrylic acid co trimethoxysilyl propyl methacrylate grafted fumed silica and its application to dye sensitized solar cell

Silakul

Magaraphan

2017

Polymer Composites

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This research focused on an electrical improvement of polymer nanocomposite which had potential for application in dye sensitized solar cells (DSSCs). This composite polymer electrolyte can be prepared by admicellar polymerization to form a core-shell structure. The shell was prepared by acrylic acid (AA) monomer copolymerization with modified silica from trimethoxysilyl propyl methacrylate monomer (MPS) and hydrophilic silica (R200) (MPS-SiO 2 ) and then coated on natural rubber (NR) as a core (PAA-adp-NR co MPS-SiO 2 ). At 1.5 wt% MPS-SiO 2 , the ionic conductivity of PAA-adp-NR co MPS-SiO 2 was improved from 0.769 mS cm 21 of PAA-adp-NR to 0.931 mS cm 21 , and showed the lowest charge transfer resistance (R ct ) at 2.065 ohm. Moreover, the current density (J sc ) and conversion efficiency (g) were 11.792 mA/cm 2 and 3.485%, respectively. In the case of thermal stress stability, J sc of PAA-adp-NR co MPS-SiO 2 (1.5 wt% MPS-SiO 2 ) was better than PAA-adp-NR. J sc of PAA-adp-NR decreased 40.58% from its original value while J sc of PAA-adp-NR co MPS-SiO 2 (1.5 wt% MPS-SiO 2 ) decreased 35.71% from its original value at 4 days with a slower rate than PAA-adp-NR. g of PAA-adp-NR co MPS-SiO 2 (1.5 wt% MPS-SiO 2 ) remained 6.67% of its original value at 28 days while g values of liquid electrolytes and PAA-adp-NR were close to zero. POLYM. COMPOS., 00:000-000, 2017.NR were close to zero. POLYM. COMPOS., 40:304-314, 2019.

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Effects of water-based gel electrolyte on the charge recombination and performance of dye-sensitized solar cells

Cited by 24 publications

References 46 publications

Aqueous dye-sensitized solar cells

Aqueous dye-sensitized solar cells

Preliminary Investigation on Vacancy Filling by Small Molecules on the Performance of Dye-Sensitized Solar Cells: The Case of a Type-II Absorber

Polymer electrolyte developed from natural rubber‐polyacrylic acid co trimethoxysilyl propyl methacrylate grafted fumed silica and its application to dye sensitized solar cell

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