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Two-Dimensional Materials for Raman Thermometry on Power Electronic Devices.

Mohammed Boussekri1, Lucie Frogé2, Raphael Sommet1

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Summary

Atomically thin 2D materials enable nanoscale temperature sensing for metallized electronic devices. This overcomes limitations of traditional Raman thermometry, offering precise thermal measurements for advanced component design.

Keywords:
2D materials3D finite elements simulationsRaman spectrometrypower electronicsthermal sensorsthermoreflectance

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Semiconductor Physics

Background:

  • Traditional Raman thermometry is limited for metallized semiconductor devices due to metal's lack of Raman scattering.
  • Accurate sub-microscale thermal measurements are crucial for advanced electronic components.

Purpose of the Study:

  • To investigate the use of 2D materials as local temperature sensors for nanoscale thermal measurements on metallized power devices.
  • To assess the feasibility, effectiveness, and reliability of 2D materials in thermal characterization.

Main Methods:

  • Applied Raman thermometry using 2D materials on a gold resistor and an SiC JBS diode.
  • Validated measurements with complementary thermoreflectance technique on metallized surfaces.
  • Conducted thermal simulations to analyze device thermal response.
  • Investigated transfer and direct growth methods for 2D material integration.

Main Results:

  • 2D materials enabled precise absolute surface temperature measurements at the nanoscale.
  • Raman thermometry on 2D materials showed close agreement with thermoreflectance on metallized surfaces (e.g., 22.099 vs 21.898 °C/W for thermal resistance).
  • Demonstrated good thermal conductance at the metal/2D material interface.
  • Highlighted the influence of integration methods (transfer vs. direct growth) on thermal performance.

Conclusions:

  • Atomically thin 2D materials are effective nanoscale temperature probes for thermal management in electronic devices.
  • This approach overcomes limitations of traditional methods for metallized components.
  • 2D materials offer new insights for optimizing thermal design in advanced electronics.