Fluorous-inorganic hybrid dielectric materials for solution-processed electronic devices

Kim, Heejin; Jo, Seong Jin; Jee, Joong Hwi; Han, Woo Je; Kim, Youngtae; Park, Hyung Ho; Jin, Hyoung Joon; Yoo, Byung Woo; Lee, Jin Kyun

doi:10.1039/c4nj01435a

Cited by 12 publications

(4 citation statements)

References 52 publications

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“…When transferring aggregates from aqueous solution to a thin film, a dramatic change in the dielectric constant (κ) of the surrounding environment occurs (κ: water 80, air ∼1), which can destabilize self-assembled structures . Perfluorocarbons are the most gas-like phase having very low κ (perfluorohexane: 1.57); therefore, we expect aggregates of 2 to easily transfer to surfaces. , Indeed, a simple dropcasting procedure resulted in the transfer of aggregates of 2 to glass with similar absorption and emission profiles to that observed in fluorous solvent (Figures A and S11). Contact angle measurements indicated that the surface was hydrophobic after dropcasting 2 (Figure B).…”

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confidence: 94%

Fluorescent Cyanine Dye J-Aggregates in the Fluorous Phase

Cao

Sletten

2018

J. Am. Chem. Soc.

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We present a perfluorocarbon-hydrocarbon amphiphilic cyanine dye that J-aggregates in fluorous solvent. J-Aggregation is a special type of fluorophore aggregation, affording enhanced photophysical properties. Cyanine dyes are excellent J-aggregators in water but, until now, cyanine J-aggregates have not been translated to nonaqueous media. The fluorous phase J-aggregate displays enhanced photostability and processability compared to analogous aqueous aggregates.

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confidence: 94%

Fluorescent Cyanine Dye J-Aggregates in the Fluorous Phase

Cao

Sletten

2018

J. Am. Chem. Soc.

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“…3–9 Therefore, it is necessary to prepare high dielectric constant composites. A general method is to incorporate ceramic fillers with high dielectric constant (e.g., BaTiO 3 , 4,10–13 SiC, 14 KTa 1−x NbxO 3 , 15 and ZrO 2 16 ) into polymers. However, due to the lack of interaction groups between ceramic fillers and matrix, the ceramic filler cannot ensure its uniform and stable dispersion of ceramic filler in the matrix, which will inevitably create defects in the matrix.…”

Section: Introductionmentioning

confidence: 99%

PVDF promotes TiO2 dispersion to obtain composite films with high dielectric constant and low loss

Peng

Huang

et al. 2021

High Performance Polymers

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A series of three-phase composite films with different filler contents were prepared by in-situ polymerization. The composite films comprise polyimide (PI), poly (vinylidene fluoride) (PVDF), and titanium dioxide (TiO2). Compared with PI/TiO2 composite films, the PI/TiO2-PVDF composite films not only get a significant increase in dielectric constant, but also own better mechanical properties. Our results show that with the loading of 50wt% PVDF particles, the dielectric constant of PI/TiO2-PVDF composite films increased from 6.5 to 18.14 at 1 MHz and room temperature, while the tensile strength of PI/TiO2-PVDF composite films increased from 45 to 72 MPa. In addition, the films maintain a low loss tangent of about 0.02. PI/PVDF composite films were also prepared. It was found that dielectric constant of PI/PVDF composite was significantly lower than that of PI/TiO2-PVDF composite films when the loading of PVDF is 50wt%.

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“…The direct photopatterning of BTO thin films was achieved via electron-beam (e-beam) lithography and photolithography. While the preparation of nanoparticles capped with fluorous moieties has been achieved through various methods [29][30][31], in this study, BTO nanoparticles with highly fluorinated ligands were obtained using ligand-exchange reactions [32,33]. To impart solubility to the synthesized BTO nanoparticles (BTO-DA) in a fluorous solvent, perfluoro-3,6,9-trioxatridecanoic acid (PECA) (Fluorochem, Hadfield, UK)-a perfluoroalkyl ether-type ligand functionalized with a carboxylic acid group at the end of the chain-was used to substitute the organic capping ligand surrounding the inorganic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Highly Fluorinated Barium Titanate Nanoparticle Dispersion for Fabrication of Lithographically Patterned Thin Films

Kim

et al. 2019

Materials

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We report the synthesis, characterization, and photopatterning of high-k inorganic nanoparticles that are covered with highly fluorinated carboxylic acid and, as a result, are solution-processable in fluorous liquids. Barium titanate (BTO) nanoparticles, 7–8 nm in diameter, were prepared under solvothermal conditions and were surface-modified with perfluoroalkyl ether-type carboxylic acid molecules via ligand-exchange reactions. Thin films with a high dielectric constant (9.27 at 1 kHz) were achieved by spin-coating homogeneous solutions of BTO nanoparticles in a fluorous solvent (HFE-7500). Additionally, electron-beam lithography and photolithography were applied to the thin films of BTO nanoparticles, yielding BTO patterns with scales of 300 nm and 5 μm, respectively. Thus, an approach for a chemically non-damaging solution process of inorganic materials for device implementation was successfully demonstrated.

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Fluorous-inorganic hybrid dielectric materials for solution-processed electronic devices

Abstract: Fluorous-inorganic hybrid dielectric (FIHD) materials in fluorous solvents can be deposited on top of organic semiconductor films by solution casting.

Cited by 12 publications

References 52 publications

Fluorescent Cyanine Dye J-Aggregates in the Fluorous Phase

Fluorescent Cyanine Dye J-Aggregates in the Fluorous Phase

PVDF promotes TiO2 dispersion to obtain composite films with high dielectric constant and low loss

Highly Fluorinated Barium Titanate Nanoparticle Dispersion for Fabrication of Lithographically Patterned Thin Films

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