Ionic liquid crystals: Synthesis, structure and applications to I 2-free solid-state dye-sensitized solar cells

Won Seok Chi; Harim Jeon; Sang Jin Kim; Dong Jun Kim; Jong Hak Kim

doi:10.1007/s13233-013-1097-3

Ionic liquid crystals: Synthesis, structure and applications to I ₂-free solid-state dye-sensitized solar cells

Won Seok Chi, Harim Jeon, Sang Jin Kim, Dong Jun Kim, Jong Hak Kim

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

A novel type of ionic liquid crystal (ILC) was synthesized and used as a solid electrolyte in I₂-free solidstate dye-sensitized solar cells (ssDSSCs). In particular, the properties of two ILCs, 1-[(4-ethenylphenyl) methyl]-3-butyl-imidazolium iodide (EBII) with a single aliphatic C=C bond and 1-[(4-ethenylphenyl)methyl]-3-vinyl-imidazolium iodide (EVII) with two aliphatic C=C bonds, were evaluated. The structures and morphologies of the ILCs were characterized using Fourier transform infrared spectroscopy (FTIR) and polarized optical microscopy (POM). Ultraviolet (UV)-visible spectroscopy, X-ray diffraction (XRD), and differential scanning calorimetry (DSC) analyses revealed that EBII exhibited weaker π-π stacking interactions, longer d-spacing, and a lower melting temperature. The energy conversion efficiency of I ₂-free ssDSSC with EBII (4.7% at 100 mW/cm²) was higher than with EVII (3.8%) due to facile charge transport and lower electron recombination in the former, as supported by electrochemical impedance spectroscopy (EIS).

Original language	English
Pages (from-to)	315-320
Number of pages	6
Journal	Macromolecular Research
Volume	21
Issue number	3
DOIs	https://doi.org/10.1007/s13233-013-1097-3
Publication status	Published - 2013 Mar

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Organic Chemistry
Polymers and Plastics
Materials Chemistry

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title = "Ionic liquid crystals: Synthesis, structure and applications to I 2-free solid-state dye-sensitized solar cells",

abstract = "A novel type of ionic liquid crystal (ILC) was synthesized and used as a solid electrolyte in I2-free solidstate dye-sensitized solar cells (ssDSSCs). In particular, the properties of two ILCs, 1-[(4-ethenylphenyl) methyl]-3-butyl-imidazolium iodide (EBII) with a single aliphatic C=C bond and 1-[(4-ethenylphenyl)methyl]-3-vinyl-imidazolium iodide (EVII) with two aliphatic C=C bonds, were evaluated. The structures and morphologies of the ILCs were characterized using Fourier transform infrared spectroscopy (FTIR) and polarized optical microscopy (POM). Ultraviolet (UV)-visible spectroscopy, X-ray diffraction (XRD), and differential scanning calorimetry (DSC) analyses revealed that EBII exhibited weaker π-π stacking interactions, longer d-spacing, and a lower melting temperature. The energy conversion efficiency of I 2-free ssDSSC with EBII (4.7% at 100 mW/cm2) was higher than with EVII (3.8%) due to facile charge transport and lower electron recombination in the former, as supported by electrochemical impedance spectroscopy (EIS).",

author = "Chi, {Won Seok} and Harim Jeon and Kim, {Sang Jin} and Kim, {Dong Jun} and Kim, {Jong Hak}",

year = "2013",

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doi = "10.1007/s13233-013-1097-3",

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AU - Chi, Won Seok

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AU - Kim, Sang Jin

AU - Kim, Dong Jun

AU - Kim, Jong Hak

PY - 2013/3

Y1 - 2013/3

N2 - A novel type of ionic liquid crystal (ILC) was synthesized and used as a solid electrolyte in I2-free solidstate dye-sensitized solar cells (ssDSSCs). In particular, the properties of two ILCs, 1-[(4-ethenylphenyl) methyl]-3-butyl-imidazolium iodide (EBII) with a single aliphatic C=C bond and 1-[(4-ethenylphenyl)methyl]-3-vinyl-imidazolium iodide (EVII) with two aliphatic C=C bonds, were evaluated. The structures and morphologies of the ILCs were characterized using Fourier transform infrared spectroscopy (FTIR) and polarized optical microscopy (POM). Ultraviolet (UV)-visible spectroscopy, X-ray diffraction (XRD), and differential scanning calorimetry (DSC) analyses revealed that EBII exhibited weaker π-π stacking interactions, longer d-spacing, and a lower melting temperature. The energy conversion efficiency of I 2-free ssDSSC with EBII (4.7% at 100 mW/cm2) was higher than with EVII (3.8%) due to facile charge transport and lower electron recombination in the former, as supported by electrochemical impedance spectroscopy (EIS).

AB - A novel type of ionic liquid crystal (ILC) was synthesized and used as a solid electrolyte in I2-free solidstate dye-sensitized solar cells (ssDSSCs). In particular, the properties of two ILCs, 1-[(4-ethenylphenyl) methyl]-3-butyl-imidazolium iodide (EBII) with a single aliphatic C=C bond and 1-[(4-ethenylphenyl)methyl]-3-vinyl-imidazolium iodide (EVII) with two aliphatic C=C bonds, were evaluated. The structures and morphologies of the ILCs were characterized using Fourier transform infrared spectroscopy (FTIR) and polarized optical microscopy (POM). Ultraviolet (UV)-visible spectroscopy, X-ray diffraction (XRD), and differential scanning calorimetry (DSC) analyses revealed that EBII exhibited weaker π-π stacking interactions, longer d-spacing, and a lower melting temperature. The energy conversion efficiency of I 2-free ssDSSC with EBII (4.7% at 100 mW/cm2) was higher than with EVII (3.8%) due to facile charge transport and lower electron recombination in the former, as supported by electrochemical impedance spectroscopy (EIS).

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Ionic liquid crystals: Synthesis, structure and applications to I ₂-free solid-state dye-sensitized solar cells

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