Star polymer–TiO<sub>2</sub> nanohybrids to effectively modify the surface of PMMA dielectric layers for solution processable OFETs

Budzałek, Katarzyna; Ding, Hongyan; Janasz, Łukasz; Wypych‐Puszkarz, Aleksandra; Çetinkaya, Onur; Pietrasik, Joanna; Kozanecki, Marcin; Ulański, Jacek; Matyjaszewski, Krzysztof

doi:10.1039/d0tc03137b

Cited by 19 publications

(18 citation statements)

References 65 publications

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“…The dielectric permittivity measured in the frequency range from 100 Hz to 1 MHz for all the samples was found to be close to 2.8. These findings agree with our previous studies 8 and, in fact it was expected considering the very low volume fraction of high-k ceramic nanoparticles (TiO 2 ) in the polymer matrix. Also, surface energy analysis showed no significant differences between neat PMMA layers and hybrid dielectrics.…”

Section: Characterization Of Pmma Nanocompositessupporting

confidence: 93%

“…6,7 In our previous paper we discovered and described the effect of an unusually significant influence of a very small amount of new hybrid TiO 2 nanoparticles when added to a polymer dielectric layer on OFET performance. 8 In the present work, we explain the mechanism responsible for the discovered effect. To eliminate the influence of various parameters on the observed effect, we decided to continue the work with the same materials; the solution processable gate dielectric poly(methyl methacrylate) (PMMA) was used, modified by the addition of hybrid nanoparticles containing TiO 2 .…”

Section: Introductionmentioning

confidence: 86%

“…The structure of the OFET was the same as in the previous work. 8 Characterization Dynamic light scattering. Dynamic light scattering (DLS) was used to determine average hydrodynamic diameters of the obtained TiO 2 @PSAN-b-PAA-PDVB nanoparticles.…”

Section: Thin Film and Ofet Preparationmentioning

confidence: 99%

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Continuity of thin layers of an organic semiconductor induced by the modification of the gate insulator

et al. 2022

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Section: Characterization Of Pmma Nanocompositessupporting

confidence: 93%

Section: Introductionmentioning

confidence: 86%

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Continuity of thin layers of an organic semiconductor induced by the modification of the gate insulator

et al. 2022

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“…In comparison to polymeric materials, inorganic-organic dielectric materials usually exhibit lower stretchability and higher roughness, causing obstacles for their application in flexible electronics [4]. However, our last findings evidenced that the addition of a star-shaped copolymer with a small amount of TiO 2 to the PMMA matrix significantly decreased the roughness of this dielectric layer from 15.3 to 0.43 nm and improved the efficiency of the obtained OFETs considerably [5].…”

Section: Introductionmentioning

confidence: 71%

Effects of Counter Anions on AC and DC Electrical Conductivity in Poly(Dimethylsiloxane) Crosslinked by Metal-Ligand Coordination

et al. 2021

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There is an urgent need for the development of elastic dielectric materials for flexible organic field effect transistors (OFETs). In this work, detailed analysis of the AC and DC electrical conductivity of a series of flexible poly(dimethylsiloxane) (PDMS) polymers crosslinked by metal-ligand coordination in comparison to neat PDMS was performed for the first time by means of broadband dielectric spectroscopy. The ligand was 2,2-bipyridine-4,4-dicarboxylic amide, and Ni2+, Mn2+, and Zn2+ were introduced for Cl−, Br−, and I− salts. Introduction of metal salt and creation of coordination bonds resulted in higher permittivity values increasing in an order: neat PDMS < Ni2+ < Mn2+ < Zn2+; accompanied by conductivity values of the materials increasing in an order: neat PDMS < Cl− < I− < Br−. Conductivity relaxation time plot as a function of temperature, showed Vogel-Fulcher–Tammann dependance for the Br− salts and Arrhenius type for the Cl− and I− salts. Performed study revealed that double-edged challenge can be obtained, i.e., dielectric materials with elevated value of dielectric permittivity without deterioration too much the non-conductive nature of the polymer. This opens up new perspectives for the production of flexible dielectrics suitable for gate insulators in OFETs. Among the synthesized organometallic materials, those with chlorides salts are the most promising for such applications.

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“…Electronic devices for energy storage require high permittivity ( k ) materials. − Most importantly, high- k ceramic or conductive fillers are widely used as reinforcing phases in composite or hybrid materials. Such materials can be incorporated into flexible polymers with advantages of good mechanical and dielectric performance because of their potential applications in the field of flexible electronic devices including high-energy storage devices, organic field-effect transistors (OFETs), smart skins, and electrical power systems. − A variety of polymeric materials, such as poly(methyl methacrylate) (PMMA), , polystyrene (PS), polyacrylonitrile (PAN), polyimide (PI), poly(vinyl alcohol) (PVA), and poly(4-vinylphenol) (PVP), used as host materials have found application as dielectrics in OFETs and circuits. Among these materials, PI is considered to be one of the most important high-performance materials because of its excellent thermal stability and superior mechanical properties coupled with good chemical resistance. − Therefore, PI is desirable for applications in electrical fields as a durable polymer matrix …”

Section: Introductionmentioning

confidence: 99%

Thermally Robust Zirconia Nanorod/Polyimide Hybrid Films as a Highly Flexible Dielectric Material

Yan

Moon

Zhang

et al. 2021

ACS Appl. Nano Mater.

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In this study, a strategy for the fabrication of zirconia-polyimide (ZrO 2 -PI) nanohybrid films with high permittivity (high-k), thermal stability, and excellent mechanical properties has been developed. A colloidal suspension of ZrO 2 nanorods was prepared using the facile microwave-hydrothermal treatment approach. The ZrO 2 -PI nanohybrid film was fabricated by casting an aqueous solution containing water-soluble poly(amic acid) ammonium salt (PAS) and water-dispersible ZrO 2 nanorods followed by thermal imidization. Atomic force microscopy and scanning electron microscopy images indicated that the ZrO 2 nanorods were uniformly dispersed in the PI matrix. Because of the high permittivity of the ZrO 2 nanorods and good compatibility between polyimide and ZrO 2 as well as the nanosize of ZrO 2 , the permittivity increased to 5.1 as the ZrO 2 concentration reached 10% at 10 Hz, while the dielectric loss was as low as 0.05 at 10 Hz. The prepared ZrO 2 -PI nanohybrid films had excellent heat resistance with quite low coefficients of thermal expansion (CTE), as low as 16.3 ppm/K. The ZrO 2 -PI nanohybrid films have excellent thermal stability and good mechanical flexibility. Moreover, no distinct changes were observed for the PAS solution over a storage time of 3 months, after which the nanohybrid film could still be successfully synthesized by thermal imidization. In addition, the water uptake of the ZrO 2 -PI nanohybrid film was approximately 2.5% under 60% relative humidity. The high stability of the PAS precursor, good flexibility, enhanced permittivity, and low CTE behavior of the ZrO 2 -PI nanohybrid films could make this strategy attractive for the ecofriendly design of dielectric polymer nanohybrids as well as for the fabrication of nanohybrid films with potential applications in high charge-storage capacitors and organic field-effect transistors (OFETs) in the flexible electronics industry.

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Star polymer–TiO₂ nanohybrids to effectively modify the surface of PMMA dielectric layers for solution processable OFETs

Abstract: Solution processable dielectric nanomaterials were prepared by the polymer-templated synthesis of hybrid nanoparticles containing TiO2.

Cited by 19 publications

References 65 publications

Continuity of thin layers of an organic semiconductor induced by the modification of the gate insulator

Continuity of thin layers of an organic semiconductor induced by the modification of the gate insulator

Effects of Counter Anions on AC and DC Electrical Conductivity in Poly(Dimethylsiloxane) Crosslinked by Metal-Ligand Coordination

Thermally Robust Zirconia Nanorod/Polyimide Hybrid Films as a Highly Flexible Dielectric Material

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Star polymer–TiO2 nanohybrids to effectively modify the surface of PMMA dielectric layers for solution processable OFETs

Abstract: Solution processable dielectric nanomaterials were prepared by the polymer-templated synthesis of hybrid nanoparticles containing TiO2.

Cited by 19 publications

References 65 publications

Continuity of thin layers of an organic semiconductor induced by the modification of the gate insulator

Continuity of thin layers of an organic semiconductor induced by the modification of the gate insulator

Effects of Counter Anions on AC and DC Electrical Conductivity in Poly(Dimethylsiloxane) Crosslinked by Metal-Ligand Coordination

Thermally Robust Zirconia Nanorod/Polyimide Hybrid Films as a Highly Flexible Dielectric Material

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Star polymer–TiO₂ nanohybrids to effectively modify the surface of PMMA dielectric layers for solution processable OFETs