Publication
Sub‐Picosecond Carrier Dynamics Explored using Automated High‐Throughput Studies of Doping Inhomogeneity within a Bayesian Framework
Publisher:
Wiley
Date:
24-04-2023
DOI:
10.1002/SMLL.202300053
Abstract: Bottom–up production of semiconductor nanomaterials is often accompanied by inhomogeneity resulting in a spread in electronic properties which may be influenced by the nanoparticle geometry, crystal quality, stoichiometry, or doping. Using photoluminescence spectroscopy of a population of more than 11 000 in idual zinc‐doped gallium arsenide nanowires, inhomogeneity is revealed in, and correlation between doping and nanowire diameter by use of a Bayesian statistical approach. Recombination of hot‐carriers is shown to be responsible for the photoluminescence lineshape by exploiting lifetime variation across the population, hot‐carrier dynamics is revealed at the sub‐picosecond timescale showing interband electronic dynamics. High‐throughput spectroscopy together with a Bayesian approach are shown to provide unique insight in an inhomogeneous nanomaterial population, and can reveal electronic dynamics otherwise requiring complex pump‐probe experiments in highly non‐equilibrium conditions.