2025/01/01 by Víctor Vega‐Mayoral, Saül Garcia‐Orrit, Peijiang Wang +4 · 2 voices
Engineering · Materials Science · #Chalcogenide Semiconductor Thin Films #Nanocluster Synthesis and Applications #Quantum Dots Synthesis And Properties
paper · pdf · doi:10.1039/d5nr00511f
openalex publication_date 2025/01/01 · openalex created_date 2025/03/19 · openalex updated_date 2026/08/01
S nanocrystals and improved surface-passivated nanostructures were studied under different pump fluences and photon energies. Surface passivation significantly sharpens excitonic resonances, reducing defect-assisted recombination. Transient absorption spectroscopy reveals that the excited state dynamics are dominated by trapping and exciton recombination at low exciton densities, while fluence dependence studies reveal significant contributions from biexcitons and Auger recombination in all samples at high exciton densities. Notably, surface-passivated nanostructures exhibit faster multi-exciton recombination dynamics, highlighting the impact of effective surface passivation.