Single-Material Graphene Thermocouples

Single-Material Graphene Thermocouples

Harzheim, A. (University of Oxford)
Könemann, Fabian (IBM Research)
Gotsmann, Bernd (IBM Research)
van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft)
Gehring, P. (TU Delft QN/van der Zant Lab; University of Oxford; Kavli institute of nanoscience Delft)

2020

On-chip temperature sensing on a micro- to nanometer scale is becoming more desirable as the complexity of nanodevices keeps increasing and their downscaling continues. The continuation of this trend makes thermal probing and management more and more challenging. This highlights the need for scalable and reliable temperature sensors, which have the potential to be incorporated into current and future device structures. Here, it is shown that U-shaped graphene stripes consisting of one wide and one narrow leg form a single material thermocouple that can function as a self-powering temperature sensor. It is found that the graphene thermocouples increase in sensitivity with a decrease in leg width, due to a change in the Seebeck coefficient, which is in agreement with previous findings and report a maximum sensitivity of ΔS ≈ 39 μV K⁻¹.

2D
graphene
Seebeck coefficient
single-material
thermocouple

http://resolver.tudelft.nl/uuid:91da4bca-132e-4fc6-89b9-c9a1b1967ef6

https://doi.org/10.1002/adfm.202000574

2021-04-09

1616-301X

Advanced Functional Materials, 30 (22)

Institutional Repository

journal article

© 2020 A. Harzheim, Fabian Könemann, Bernd Gotsmann, H.S.J. van der Zant, P. Gehring