Thermal Characterization of GaN-Based Components Using Raman Microtemperatures

This PhD position at the GREYC laboratory within the University of Caen Normandy investigates the thermal behavior of gallium nitride (GaN) power and microwave components under operational conditions. The doctoral candidate will utilize and improve Raman spectroscopy coupled with cerium oxide nanoparticle micro-thermometers to measure self-heating temperatures near active electronic channels. The research aims to optimize thermal characterization procedures for aerospace, telecommunications, and electric vehicle power systems. The successful applicant will conduct experimental testing, develop deposition methods for micro-thermometers, and build thermal models to predict component reliability.

• Improve the distribution and application methods of cerium oxide nanoparticle micro-thermometers on semiconductor surfaces
• Design and develop an innovative deposition system for micro-thermometers on industrial measurement boards
• Perform experimental thermal characterization of GaN power and microwave transistors under continuous and pulsed operating regimes
• Extend the operational characterization workflow from high-frequency radar and satellite components to electric vehicle power converters
• Develop comprehensive thermal models to understand and predict the thermal behavior and degradation of power components