High Performance Organic Electronic Devices Based on a Green Hybrid Dielectric (Adv. Electron. Mater. 10/2021)

Tousignant, Mathieu N.; Rice, Nicole A.; Niskanen, Jukka; Richard, Chloé M.; Ritaine, Dialia; Adronov, Alex; Lessard, Benoît H.

doi:10.1002/aelm.202170042

Cited by 2 publications

(8 citation statements)

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“…[ 19,20 ] Our group reported the use of TPCL ( Figure A) as a low‐ k top encapsulating layer, which was crosslinked at the PVA interface, providing resistance to moisture, reducing the gate leakage while also enabling a thin hydrophobic layer which was impervious to dissolution from sequential solution deposition of the semiconductor. [ 18 ] We have also reported that the use of cellulose nanocrystals can increase the viscosity of the PVA layer during deposition, reducing the chance of fingering and providing a more uniform film and less short‐circuited devices. [ 37 ] However, the leakage current of these bilayer devices can be further reduced through a tri‐layer architecture.…”

Section: Discussionmentioning

confidence: 99%

“…[ 30 ] TPCL was synthesized following previously reported procedures. [ 18 ] The TPCL was dissolved in anhydrous toluene at 2 mg ml −1 and heated to 60 °C for 1 h before being filtered through a 0.45 µm PTFE filter into a new vial. The filtered TPCL solution was stored in a nitrogen environment and small volumes of the stock solution were removed for spin coating under ambient conditions.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, our initial studies suffered from relatively low TFT performance due to the low sc-SWCNT density on the TPCL. [18,38] Therefore we are targeting a TGBC architecture allowing for the substrates to be treated with OTS prior to sc-SWCNT deposition, leading to higher sc-SWCNTs network densities. [39,40] TPCL does not form uniform films on glass or OTS-treated substrates due to its tendency to aggregate.…”

Section: Thin Film Characterizationmentioning

confidence: 99%

“…[16] When used in the fabrication of SWCNT TFTs, PVA can prevent saturation of the output curves, increase leakage currents and create a polar environment at the SWCNT/PVA interface reducing device performance. [17,18] To circumvent this challenge the dielectric layer can be modified by adding a thin low-k dielectric material on top of the high-k dielectric creating a bilayer dielectric. Low-k dielectric materials are better for the deposition of the semiconducting material and reduce the polarity at the dielectric/semiconductor interface leading to higher operating currents and mobilities.…”

mentioning

confidence: 99%

“…Low-k dielectric materials are better for the deposition of the semiconducting material and reduce the polarity at the dielectric/semiconductor interface leading to higher operating currents and mobilities. [15,[17][18][19][20][21][22][23][24] Furthermore this bilayer approach can also be used to change the hydrophobicity of the surface, similar to the use of octyl trichlorosilane (OTS), leading to reduced wettability of the solvent and resulting in a better SWCNT network density. [12,25] Studies have also shown that the addition of a third low-k layer can be used to sandwich the high-k dielectric material further improving device performance by reducing leakage currents between the source and the gate.…”

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confidence: 99%

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N‐Type Single Walled Carbon Nanotube Thin Film Transistors Using Green Tri‐Layer Polymer Dielectric

Tousignant

Ronnasi

Tischler

et al. 2023

Adv Materials Inter

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The proliferation of disposable, wearable, and implantable printable electronics requires the development of high‐performance biodegradable, and sustainable electronic components. Often green materials don't have the necessary properties for high‐performance electronics, therefore obtaining the ideal properties requires a combination of multiple green materials. A tri‐layer dielectric is reported using poly(lactic acid) (PLA), poly(vinyl alcohol)/cellulose nanocrystals (PVAc), and toluene diisocyanate terminated poly(caprolactone) (TPCL), which is integrated into semiconducting single‐walled carbon nanotube (sc‐SWCNT) based thin film transistors (TFTs) in a top gate bottom contact architecture. The PVA provides a high dielectric constant due to the hydroxy groups, the cellulose is used to optimize the viscosity, the TPCL layer provides a robust hydrophobic surface, and the PLA eliminates the interfacial charge traps present in the PVAc and improves the adhesion between PVAc and the substrate. This leads to a decrease in leakage currents and reduces the polarity at the dielectric/semiconductor interface. The TFTs fabricated using tri‐layer dielectrics led to air‐stable n‐type devices with higher overall performance when compared against the PVAc/TPCL bilayer devices.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Thin Film Characterizationmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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N‐Type Single Walled Carbon Nanotube Thin Film Transistors Using Green Tri‐Layer Polymer Dielectric

Tousignant

Ronnasi

Tischler

et al. 2023

Adv Materials Inter

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A Green High‐k Dielectric from Modified Carboxymethyl Cellulose‐Based with Dextrin

Santoso,

Prakoso,

Bui

et al. 2024

Macromol. Rapid Commun.

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Many crucial components inside electronic devices are made from non‐renewable, non‐biodegradable, and potentially toxic materials, leading to environmental damage. Finding alternative green dielectric materials is mandatory to align with global sustainable goals. Carboxymethyl cellulose (CMC) is a bio‐polymer derived from cellulose and has outstanding properties. Herein, citric acid, dextrin, and CMC based hydrogels were prepared, which are biocompatible and biodegradable and exhibit rubber‐like mechanical properties, with Young modulus values of 0.89 MPa. Hence, thin film CMC‐based hydrogel is explored as a suitable green high‐k dielectric candidate for operation at low voltages, demonstrating a high dielectric constant of up to 78. These fabricated transistors reveal stable high capacitance (2090 nF cm−2) for around ±3 V operation. Using a polyelectrolyte‐type approach and poly‐(2‐vinyl anthracene) (PVAn) surface modification, this study demonstrates a thin dielectric layer (d ≈ 30 nm) with a small voltage threshold (Vth ≈ ‐0.8 V), moderate transconductance (gm ≈ 65 nS), and high ON‐OFF ratio (∼ 105). Furthermore, the dielectric layer exhibits stable performance under bias stress of ± 3.5 V and 100 cycles of switching tests. The modified CMC‐based hydrogel demonstrates desirable performance as a green dielectric for low‐voltage operation, further highlighting its biocompatibility.This article is protected by copyright. All rights reserved

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High Performance Organic Electronic Devices Based on a Green Hybrid Dielectric (Adv. Electron. Mater. 10/2021)

Cited by 2 publications

References 0 publications

N‐Type Single Walled Carbon Nanotube Thin Film Transistors Using Green Tri‐Layer Polymer Dielectric

N‐Type Single Walled Carbon Nanotube Thin Film Transistors Using Green Tri‐Layer Polymer Dielectric

A Green High‐k Dielectric from Modified Carboxymethyl Cellulose‐Based with Dextrin

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