Polyvinyl Alcohol/SiO₂ Hybrid Dielectric for Transparent Flexible/Stretchable All‐Carbon‐Nanotube Thin‐Film‐Transistor Integration

Abstract

Flexible and stretchable electronic (FSE) transistors create various novel applications. Carbon nanotubes possess high intrinsic mobility and exceptional mechanical and optical characteristics, which lead to a great potential as channel and electrodes in FSE transistors. At the same time, gate dielectric is also required to be intrinsically flexible/stretchable and integratable. However, few high‐performance solutions have been reported. By adopting polyvinyl alcohol (PVA)/SiO2 hybrid layer as dielectric, the integration of high‐performance intrinsically flexible/stretchable carbon‐nanotube‐based thin film transistors is proposed and realized simply by traditional photolithography‐etching and low‐temperature solution processes. The PVA/SiO2 dielectric simultaneously provides a relatively high‐k value, improves the carrier conduction interface, increases the carbon nanotube (CNT) density, and protects the PVA from plasma damage. Soft transistors with carbon nanotube channel and electrodes exhibit carrier mobility of 14 cm2 V−1 s−1 within an operation voltage of 0.3 V. These transistors show a small bending radius of 3 mm, and the stretchable transistors can withstand 50% strain with no significant electrical degradation observed, when measured in situ and along different directions for more than 1000 cycles. This work provides a solution for soft transparent transistor integration, indicating promising applicability to soft circuits, displays, and wearable electronics.

Biodegradable Polymer Nanocomposites: A Review of Properties

“…PVA has a dielectric constant of 5-8 in the 10-106 Hz range. It exhibits a higher dielectric constant than other biodegradable polymers [111,112]. An aqueous solution of PVA can be mixed with inorganic fillers materials such as Au NPs/graphene oxide (GO) [113], GO [114],…”

Ink‐Based Additive Nanomanufacturing of Functional Materials for Human‐Integrated Smart Wearables

“…Organic-inorganic hybrid dielectrics, such as metal or metal oxide-doped polymer materials, have the desirable dielectric and mechanical performance for flexible electronics. [279,432,433] A stable dielectric performance under repeated deformations is essential for functional stretchable and flexible applications. A liquid metal-doped elastomer attracts increasing attention due to its good dielectric and mechanical properties.…”

Gold Nanoparticles as Effective ion Traps in Poly(dimethylsiloxane) Cross-Linked by Metal-Ligand Coordination

“…Such a modification made it possible to manufacture low-voltage organic thin-film transistors with suitable bending stability. Other works describe the application as a gate dielectric of a variety of composite materials: polyvinyl alcohol/SiO 2 [ 5 ], ZrTiHfO 2 -PVP [ 6 ], poly(vinyl alcohol)/2D TiO 2 nanosheets [ 7 ], as well as block copolymer elastomers [ 8 , 9 ].…”