Using polymer electrolyte gates to set-and-freeze threshold voltage and local potential in nanowire-based devices and thermoelectrics

Abstract

We use the strongly temperature-dependent ionic mobility in polymer electrolytes to 'freeze in' specific ionic charge environments around a nanowire using a local wrap-gate geometry. This enables us to set both the threshold voltage for a conventional doped substrate gate and the local disorder potential at temperatures below 200 Kelvin, which we characterize in detail by combining conductance and thermovoltage measurements with modeling. Our results demonstrate that local polymer electrolyte gates are compatible with nanowire thermoelectrics, where they offer the advantage of a very low thermal conductivity, and hold great potential towards setting the optimal operating point for solid-state cooling applications.

Published in Advanced Functional Materials. Includes colour versions of figures and supplementary information

References in corpus (16)

• Diameter-Dependent Electron Mobility of InAs Nanowires
• One-Dimensional Quantum Confinement Effect Modulated Thermoelectric Properties in InAs Nanowires
• Strong tuning of Rashba spin orbit interaction in single InAs nanowires
• Cotunneling thermopower of single electron transistors
• Nonlinear thermovoltage and thermocurrent in quantum dots
• Multi-mode Fabry-Pérot conductance oscillations in suspended stacking-faults-free InAs nanowires
• Sequential and co-tunneling behavior in the temperature-dependent thermopower of few-electron quantum dots
• Top-gate defined double quantum dots in InAs nanowires
• Realizing lateral wrap-gated nanowire FETs: Controlling gate length with chemistry rather than lithography
• Lineshape of the thermopower of quantum dots
• Giant thermovoltage in single InAs-nanowire field-effect transistors
• Measuring Temperature Gradients over Nanometer Length Scales
• Manipulation of electron orbitals in hard-wall InAs/InP nanowire quantum dots
• Electron-beam patterning of polymer electrolyte films to make multiple nanoscale gates for nanowire transistors
• Facile fabrication of lateral nanowire wrap-gate devices with improved performance
• Quantum-dot thermometry

Cited by in corpus (3)

• Gate-Tuned Thermoelectric Power in Black Phosphorus
• Near-thermal limit gating in heavily-doped III-V semiconductor nanowires using polymer electrolytes
• Ionic liquid gating of InAs nanowire-based field effect transistors