Novel room temperature ionic liquids of hexaalkyl substituted guanidinium salts for dye-sensitized solar cells

Wang, P.; Zakeeruddin, Shaik M.; Grätzel, Michaël; Kantlehner, Willi; Mezger, Jochen; Stoyanov, Edmont V.; Scherr, Oliver

doi:10.1007/s00339-003-2505-x

Cited by 87 publications

(74 citation statements)

References 21 publications

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“…Other ILs with cations such as sulfonium, [43] guanidinium, [44] ammonium, [45] or phosphonium [46] have also been explored as solvent-free electrolytes; however, they show low device efficiencies due to high viscosity and mass transport limitations of the photocurrent under full sunlight. At room temperature, the IL dibutylmethylsulphonium iodide with low concentration of iodine achieved an overall light-toelectricity conversion efficiency of 3.7% under a simulated AM 1.5G and 0.1 sunlight intensity.…”

Section: Non-imidazolium Cation-based Ionic Liquidsmentioning

confidence: 99%

Solvent‐Free Ionic Liquid Electrolytes for Mesoscopic Dye‐Sensitized Solar Cells

Zakeeruddin

Grätzel

2009

Adv Funct Materials

430

311

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Ionic liquids have been identified as a new class of solvent that offers opportunities to move away from the traditional solvents. The physical‐chemical properties of ionic liquids can be tuned and controlled by tailoring their structures. The typical properties of ionic liquids, such as non‐volatility, electrochemical stability and high conductivity, render them attractive as electrolytes for dye‐sensitized solar cells. However, the high viscosity of ionic liquids leads to mass transport limitations on the photocurrents in the solar cells at full sunlight intensity, but the contribution of a Grotthous‐type exchange mechanism in these viscous electrolytes helps to alleviate these diffusion problems. This article discusses recent developments in the field of high‐performance dye‐sensitized solar cells with ionic liquid‐based electrolytes and their characterization by electrochemical impedance analysis.

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Section: Non-imidazolium Cation-based Ionic Liquidsmentioning

confidence: 99%

Solvent‐Free Ionic Liquid Electrolytes for Mesoscopic Dye‐Sensitized Solar Cells

Zakeeruddin

Grätzel

2009

Adv Funct Materials

430

311

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“…9 N,N,N′,N′-Tetramethyl-N″,N″-dipentylguanidinium tricyanomethanide has a viscosity of 88 cP, 6 the value being relatively low given the cation.…”

Section: And [Emi][b(cn)mentioning

confidence: 99%

Application of Ionic Liquids Containing Tricyanomethanide [C(CN)₃]⁻ or Tetracyanoborate [B(CN)₄]⁻ Anions in Dye-Sensitized Solar Cells

et al. 2011

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A series of novel ionic liquids composed of imidazolium, pyridinium, pyrrolidinium, and ammonium cations with tricyanomethanide or tetracyanoborate anions were prepared. The ionic liquids were characterized by NMR and IR spectroscopy and ESI-mass spectrometry, and their physical properties were investigated. Solid state structures of the N-propyl-N-methylpyrrolidinium and triethylpropylammonium tetracyanoborate salts were obtained by single crystal Xray diffraction. The salts that are liquid at room temperature were evaluated as electrolyte additives in dye-sensitized solar cells, giving rise to efficiencies 7.35 and 7.85% under 100 and 10% Sun, respectively, in combination with the standard Z907 dye.

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“…The viscosity of dipentyl-tetramethylguanidinium tricyanomethanide (88 mPa s) is the lowest value in the guanidinium-based ILs reported by researchers [29], however strong hydrophilicity and nonideal electrochemical window arising from tricyanomethanide (N(CN) 2 − ) anion, restrict this kind of ILs to be used as electrolytes.…”

Section: Introductionmentioning

confidence: 98%

Ionic liquids based on guanidinium cations and TFSI anion as potential electrolytes

Fang

Yang

Wei

et al. 2009

Electrochimica Acta

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Novel room temperature ionic liquids of hexaalkyl substituted guanidinium salts for dye-sensitized solar cells

Cited by 87 publications

References 21 publications

Solvent‐Free Ionic Liquid Electrolytes for Mesoscopic Dye‐Sensitized Solar Cells

Solvent‐Free Ionic Liquid Electrolytes for Mesoscopic Dye‐Sensitized Solar Cells

Application of Ionic Liquids Containing Tricyanomethanide [C(CN)₃]⁻ or Tetracyanoborate [B(CN)₄]⁻ Anions in Dye-Sensitized Solar Cells

Ionic liquids based on guanidinium cations and TFSI anion as potential electrolytes

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Novel room temperature ionic liquids of hexaalkyl substituted guanidinium salts for dye-sensitized solar cells

Cited by 87 publications

References 21 publications

Solvent‐Free Ionic Liquid Electrolytes for Mesoscopic Dye‐Sensitized Solar Cells

Solvent‐Free Ionic Liquid Electrolytes for Mesoscopic Dye‐Sensitized Solar Cells

Application of Ionic Liquids Containing Tricyanomethanide [C(CN)3]− or Tetracyanoborate [B(CN)4]− Anions in Dye-Sensitized Solar Cells

Ionic liquids based on guanidinium cations and TFSI anion as potential electrolytes

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Application of Ionic Liquids Containing Tricyanomethanide [C(CN)₃]⁻ or Tetracyanoborate [B(CN)₄]⁻ Anions in Dye-Sensitized Solar Cells