Poly(vinyl alcohol) gate dielectric in organic field-effect transistors

Nawaz, Ali; Hümmelgen, Ivo A.

doi:10.1007/s10854-019-00873-5

Cited by 31 publications

(36 citation statements)

References 121 publications

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“…[ 46–48 ] However, this results in PVA slowly absorbing moisture in ambient environments, negatively impacting the electrical performance of fabricated unencapsulated electronic devices, [ 32 ] through an increase in both off state currents and gate leakage. [ 16,49 ]…”

Section: Discussionmentioning

confidence: 99%

High Performance Organic Electronic Devices Based on a Green Hybrid Dielectric

Tousignant

Rice

Niskanen

et al. 2021

Adv Elect Materials

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As the cost of electronics decreases, the demand for short‐term and single‐use applications, such as smart packaging, increases. Consequently, there is significant need for electronically active biodegradable materials to reduce the environmental impact of disposable electronic devices. A bilayer dielectric is developed based on environmentally friendly, low‐cost solution‐processable polymers, fabricated by thermally crosslinking a toluene diisocyanate‐terminated polycaprolactone (TPCL) layer with the hydroxyl groups of a poly(vinyl alcohol)/cellulose nanocrystal (CNC) blended dielectric (PVAC). Metal–insulator–metal (MIM) capacitors are fabricated and characterized under ambient and humid conditions. The incorporation of a TPCL layer in the bilayer dielectric results in a large reduction in moisture sensitivity when compared to neat PVAC without significantly altering the dielectric constant. When utilized as a dielectric in organic thin‐film transistors (OTFTs), the transistors prepared with the PVAC/TPCL dielectric have greater on/off ratios and hole mobilities, with reduced hysteresis compared to devices fabricated with PVAC. Furthermore, the fabricated OTFTs function at operating voltages six times lower when compared against a traditional silicon dioxide (SiO2) dielectric. The facile processing, combined with superior device performance, makes this green bilayer dielectric a promising candidate material for biodegradable disposable electronic applications.

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Section: Discussionmentioning

confidence: 99%

High Performance Organic Electronic Devices Based on a Green Hybrid Dielectric

Tousignant

Rice

Niskanen

et al. 2021

Adv Elect Materials

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“…Polyvinyl alcohol (PVA) is the first synthetic colloid that was first developed by Haehnel and Herrmann in 1924 [16][17][18][19][20]. It was supported by a paper in Hangzhou City, China [21].…”

Section: Introductionmentioning

confidence: 99%

A review of Polyvinyl alcohol / Carboxiy methyl cellulose (PVA/CMC) composites for various applications

khoramabadi

Arefian

Hojjati

et al. 2020

jcc

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Polyvinyl alcohol/carboxymethyl cellulose (PVA/CMC) composites have attracted considerable attention due to the synergic relation between the two polymers and developing novel blends with improved properties. On one hand, PVA is a versatile polymer with higher mechanical properties compared to CMC. On the other hand, CMC has high biodegradability and biocompatibility, while suffering from poor mechanical properties. Therefore, the blending of the two polymers can help to benefit from the individual component properties. This paper has reviewed the properties and potential applications (e.g. drug delivery, food packaging, and agriculture) of the PVA/ CMC composites.

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“…The physical interface of the obtained polymer‐TiO 2 NSs nanocomposite also is extremely smooth and uniform even when compared with other nanoparticle‐incorporated polymer dielectric composites. [ 16,23,24,40 ] Kim et al. reported that the modified surface of the inorganic nanoparticles can reduce the roughness of the dielectric layer, as well as the interface with organic dielectrics.…”

Section: Resultsmentioning

confidence: 99%

“…In this work, we adopted poly(vinyl alcohol) (PVA) as the polymer matrix, which is a water‐soluble polymer material with a relatively high k value ( k = 4–8) that is often utilized in organic transistors, and fabricated an organic‐inorganic hybrid film with 2D TiO 2 NSs with mechanically flexible nature. [ 16,23,24 ] As a result, a high‐ k dielectric layer ( k ≈ 43.8) was obtained in which the inorganic fillers were well‐dispersed in the polymer matrix without additional cross‐linking procedure. In other words, a facile methodology based on properly interface‐engineered gate dielectric materials for substantial improvement of k ‐value and leakage current was demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Strategic Customization of Polymeric Nanocomposites Modified by 2D Titanium Oxide Nanosheet for High‐k and Flexible Gate Dielectrics

Jang

Park

Kim

et al. 2021

Small

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Organic polymer‐based dielectrics with intrinsic mechanical flexibility and good processability are excellent candidates for the dielectric layer of flexible electronics. These polymer films can become even more rigid and electrically robust when modified through cross‐linking processes. Moreover, the composites formed by dispersing nanoscale inorganic fillers in a polymer matrix can exhibit further improved polarization property. However, these strategies can be challenging as homogeneous dispersion of nanomaterials in the matrix is difficult to achieve; thus, degradation of electrically insulating properties of nanocomposite layers is often observed. Here, a high‐k, pinhole‐free, and flexible poly(vinyl alcohol) (PVA)‐based nanocomposite dielectric is presented, incorporating 2D TiO2 nanosheets (NSs) for the first time. Despite the attractive dielectric constant, exceptional flexibility, and electrically insulating property of PVA‐TiO2 nanocomposites, only few studies on these materials have been reported. The organic/inorganic nanosheet hybrid layer, which reaches an unprecedentedly high dielectric constant of 43.8 (more than four times higher than that of cross‐linked PVA), also exhibits an outstanding leakage current density as low as 10−9 A cm−2. Furthermore, the repeated bending tests for nanocomposite capacitors reveal their capability of operating without any deterioration of their performances even after 1000 iterations of bending cycles at a bending radius of 3 mm.

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Poly(vinyl alcohol) gate dielectric in organic field-effect transistors

Cited by 31 publications

References 121 publications

High Performance Organic Electronic Devices Based on a Green Hybrid Dielectric

High Performance Organic Electronic Devices Based on a Green Hybrid Dielectric

A review of Polyvinyl alcohol / Carboxiy methyl cellulose (PVA/CMC) composites for various applications

Strategic Customization of Polymeric Nanocomposites Modified by 2D Titanium Oxide Nanosheet for High‐k and Flexible Gate Dielectrics

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