Context: MicroLEDs based on III-nitride semiconductors are promising for display and optoelectronic technologies. Their performance depends on carrier recombination and transport at the nanoscale, particularly near sidewalls, interfaces and defects. Time-Resolved Cathodoluminescence (TRCL) combines electron microscopy spatial resolution with time- and spectrally-resolved luminescence, enabling investigation of local carrier dynamics with nanometric spatial and sub-nanosecond temporal resolution. The thesis aims to develop TRCL methods for III-nitride microLEDs.

Work description: The candidate will develop TRCL measurements: optimize electron-beam energy, current and temperature; investigate carrier dynamics and the influence of sidewalls, interfaces and defects; process multidimensional TRCL datasets. The work will be performed within the PFNC platform at CEA-Leti, in interaction with researchers working on microLEDs.

Required skills: Strong background in solid-state physics and motivation to learn characterization and data analysis. Knowledge of luminescence is appreciated. The candidate will develop skills through academic collaborations and interaction with LETI partners.