Evaluation of thermal transport and phonon MFPs of wide bandgap semiconductor materials using thermoreflectance method
Wide-bandgap semiconductors represented by silicon carbide (SiC) and gallium nitride (GaN), as well as ultra-wide-bandgap semiconductors such as diamond, aluminum nitride (AlN), and gallium oxide (Ga2O3), have attracted much attention. These materials are characterized by their ability to withstand high voltages due to their wide bandgaps, and play an important role in power devices for electric vehicles and large industrial equipment.
On the other hand, if the power loss, i.e., the amount of heat generated, increases due to handling of high currents, it becomes a factor that impairs device performance and reliability. It is also known that as materials become thinner and finer and the characteristic length of the system becomes shorter than the phonon mean free path, ballistic heat transport effects appear and the thermal conductivity becomes smaller than that of the bulk material. Proper device functionality requires a better understanding of phonon heat transport in semiconductor materials and appropriate thermal management.
What you will learn in this PapersPicks
PapersPicks "Evaluation of thermal transport and phonon MFP of wide bandgap semiconductor materials using the thermoreflectance method", available for download on this page, presents the following topics from the academic papers lisenced under a Creative Commons CC BY license.
- Evaluation of phonon MFP spectra and their temperature dependence in GaAs, GaN, AlN, and 4H-SiC using BB-FDTR.
- Evaluation of size effect and temperature dependence of thermal conductivity in various SiC nanostructures using TDTR.
- Evaluation of thermal conductivity and interfacial thermal conductance of homoepitaxial AlN thin films and their thickness dependence using FDTR.
- Evaluation of the thermal boundary conductance across the interfaces of Ga2O3 nano-membrane exfoliated onto a single crystal diamond substrate using TDTR.
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