Thermoelectric conversion at 30K in InAs/InP nanowire quantum dots

Abstract

We demonstrate high-temperature thermoelectric conversion in InAs/InP nanowire quantum dots by taking advantage of their strong electronic confinement. The electrical conductance G and the thermopower S are obtained from charge transport measurements and accurately reproduced with a theoretical model accounting for the multi-level structure of the quantum dot. Notably, our analysis does not rely on the estimate of co-tunnelling contributions since electronic thermal transport is dominated by multi-level heat transport. By taking into account two spin-degenerate energy levels we are able to evaluate the electronic thermal conductance K and investigate the evolution of the electronic figure of merit ZT as a function of the quantum dot configuration and demonstrate ZT ~ 35 at 30 K, corresponding to an electronic effciency at maximum power close to the Curzon- Ahlborn limit.

7 pages, 4 figures

References in corpus (14)

• Thermoelectric energy harvesting with quantum dots
• Optimal energy quanta to current conversion
• Thermoelectric transport through strongly correlated quantum dots
• Optimal thermoelectric figure of merit of a molecular junction
• Violation of the Wiedemann-Franz Law in a Single-Electron Transistor
• Powerful and efficient energy harvester with resonant-tunneling quantum dots
• Thermal and Thermoelectric Transport in Nanostructures and Low-Dimensional Systems
• Thermoelectric efficiency of three-terminal quantum thermal machines
• Strongly nonlinear thermovoltage and heat dissipation in interacting quantum dots
• Quantum-fluctuation effects on the thermopower of a single-electron transistor
• ThermoElectric Transport Properties of a Chain of Quantum Dots with Self-Consistent Reservoirs
• Experimental realization of a Coulomb blockade refrigerator
• The interacting resonant level model in nonequilibrium: finite temperature effects
• Single-nanowire, low-bandgap hot carrier solar cells with tunable open-circuit voltage

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• Thermoelectric cooling properties of a quantum Hall Corbino device
• Thermoelectric properties of InAs nanowires from full-band atomistic simulations
• Parametric Study for Optimal Performance of Coulomb-Coupled Quantum Dots
• The reverse flow and amplification of heat in a quantum-dot system