High boiling point solvent-based dye solar cells pass a harsh thermal ageing test

Στεργιόπουλος, Θωμάς; Kontos, Athanassios G.; Jiang, Nancy; Milliken, D.; Desilvestro, Hans; Likodimos, V.; Falaras, Polycarpos

doi:10.1016/j.solmat.2015.09.052

Cited by 10 publications

(6 citation statements)

References 61 publications

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“…Between 540 and 800 mV, the interfacial charge-transfer resistance between the SEI and the electrolyte appears to be relatively independent of the external bias voltage. This is something that can also be seen in the literature without any further description . On the other hand, the TiO 2 /electrolyte contribution shows an exponential dependence on voltage (as does the SEI/electrolyte component below 540 mV).…”

Section: Resultssupporting

confidence: 68%

Consequences of Solid Electrolyte Interphase (SEI) Formation upon Aging on Charge-Transfer Processes in Dye-Sensitized Solar Cells

et al. 2016

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Solid electrolyte interphase (SEI) layers form on sensitized-TiO2 photo-anodes and platinum counter-electrodes when dye-sensitized solar cells (DSSCs) are subjected to an accelerated ageing protocol (e.g. heating at 85 °C in the dark for 500 hours). To understand how this will impact the device operation, electrochemical impedance spectroscopy study showed that the SEI induces an additional electron transfer process from the TiO2 to the electrolyte. This is materialized by the onset of a new charge transfer semi-circle at higher frequencies, predominantly visible under bias voltage similar and above open circuit voltage. Our results emphasized on the detrimental role of the SEI formation on device performance and lifetime.Additionally, ns-transient absorption spectroscopy shows that SEI formation reduces the rate oxidised dye regeneration. We also show that a proportion of the photogenerated holes on the dyes are transferred to the SEI itself. Prolonged ageing duration leads to the electrode's mesoporosity network entirely clogged by the SEI; thus impeding efficient transport of the electrolyte redox couple, also responsible for a further decline in photovoltaic performances.2

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Section: Resultssupporting

confidence: 68%

Consequences of Solid Electrolyte Interphase (SEI) Formation upon Aging on Charge-Transfer Processes in Dye-Sensitized Solar Cells

et al. 2016

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“…Long-term stability of n-type DSCs has been demonstrated with tetraglyme-based I 3 À /I À electrolytes. 15,16 Nonetheless, solvents such as acetonitrile, valeronitrile, propionitrile, butyronitrile, 3-methoxy propionitrile and propylene carbonate remain popular. 17,18 Acetylacetone may also be a viable solvent in DSCs.…”

Section: Introductionmentioning

confidence: 99%

Optimization of performance and long-term stability of p-type dye-sensitized solar cells with a cycloruthenated dye through electrolyte solvent tuning

Marinakis

Willgert

Constable

et al. 2017

Sustainable Energy Fuels

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“…al declared DSC long-term stability of about 5000 hrs when non-nitrile solvent for electrolyte solution is employed [12]. In particular, 3000 h light soaking exposure followed by 2000 h at 85°C induced power conversion efficiency (PCE) reduction of only 10% in the case of γ-butyrolactone-based electrolyte [12,13]. Thermal aging has also been carried out at 80°C for 2000 hrs using tetraglyme high boiling point solvent electrolyte with 20% loss in efficiency [14].…”

Section: Introductionmentioning

confidence: 99%

Stability of dye-sensitized solar cells under extended thermal stress

Yadav

Ravishankar

Pescetelli

et al. 2017

Phys. Chem. Chem. Phys.

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Stability of dye-sensitized solar cells (DSCs) is a key issue and of great interest, since it could be a potential candidate for low cost energy production in order to satisfy the global energy demand. This work provides insight on stability of DSCs, assessed through accelerated aging test at 85 o C, followed by Raman spectroscopy and impedance spectroscopy (IS) measurements. The results from DSCs based on two ruthenium-based dyes Z907, Ru505 and two commercially available electrolytes such as high stability electrolyte (HSE) and solvent-free livion 12 (L-12). The least stable device composed of Z907/HSE retains 30% of its initial efficiency after 4700 hours of thermal stress at 85°C, while the remarkably stable cells Ru505/L-12 retains 96% of its initial efficiency with degradation rate of ~14%/1000 h and ~1%/1000 h respectively. The present findings show a solution to the degradation problem far beyond standard requirements and could generate strong interest in the photovoltaic industry.

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High boiling point solvent-based dye solar cells pass a harsh thermal ageing test

Cited by 10 publications

References 61 publications

Consequences of Solid Electrolyte Interphase (SEI) Formation upon Aging on Charge-Transfer Processes in Dye-Sensitized Solar Cells

Consequences of Solid Electrolyte Interphase (SEI) Formation upon Aging on Charge-Transfer Processes in Dye-Sensitized Solar Cells

Optimization of performance and long-term stability of p-type dye-sensitized solar cells with a cycloruthenated dye through electrolyte solvent tuning

Stability of dye-sensitized solar cells under extended thermal stress

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