Impact of Surface Passivation on the Efficiency and High-Speed Modulation of III-V GaAs/AlGaAs Nanopillar Array LEDs.

ABSTRACT: III-V semiconductor nanolight sources with deep-subwavelength dimensions (≪1 μm) are essential for miniaturized photonic devices such as nanoLEDs and nanolasers. However, these nanoscale emitters typically suffer from substantial nonradiative recombination at room temperature, resulting in low efficiency and ultrashort lifetimes (<100 ps). Previous works have predominantly studied surface passivation of nanoLEDs under optical pumping conditions, while practical applications require electrically driven nanoLEDs. Here, we investigate the influence of surface passivation on the efficiency and high-speed modulation response of electrically pumped III-V GaAs/AlGaAs nanopillar array LEDs. Surface passivation was performed using ammonium sulfide chemical treatment followed by encapsulation with a

SUBMITTER: Jacob B 

PROVIDER: S-EPMC12776361 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature