• Accepted Paper

Correlative imaging of radiative and high-order nonradiative recombination processes of an in operando nitride LED

Mylène Sauty, Simon Vassant, Névine Rochat, Tanay Tak, Talla Diagne, Guilhem Saïz, Claude Weisbuch, James S. Speck, and Ludovic Douillard

Phys. Rev. Applied - Accepted 10 November, 2026

DOI: https://doi.org/10.1103/lx9w-knxx

Abstract

Energy-resolved scanning near field optical microscopy, energy-resolved electroemission microscopy and cathodoluminescence microscopy were performed on the same 4 µm region of a green multi-quantum-well nitride LED. These techniques allowed to spatially resolve radiative recombination, hot electron production due mainly to Auger-Meitner processes and V-defect position, respectively, with a spatial resolution around 100 nm. They show a strong correlation between the V-defect positions and the regions of low light emission and low Auger-Meitner electron production, indicating that V-defects sidewalls correspond to low carrier density regions. At high carrier injection of $\SI{40}{\A \cm^{-2}}$, strong hot spots appear in the electroemission maps, corresponding to spatially localized hot electron production, whose origin is still to be determined.

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