Sub-Picosecond Carrier Dynamics Explored using Automated High-Throughput Studies of Doping Inhomogeneity within a Bayesian Framework
(2023) In Small 19(33).- 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 individual 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.... (More)
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 individual 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.
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- author
- Al-Abri, Ruqaiya ; Al Amairi, Nawal ; Church, Stephen ; Byrne, Conor ; Sivakumar, Sudhakar LU ; Walton, Alex ; Magnusson, Martin H. LU and Parkinson, Patrick
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bayesian, high-throughput, nanowires, photoluminescence, split-off
- in
- Small
- volume
- 19
- issue
- 33
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:37093214
- scopus:85153321304
- ISSN
- 1613-6810
- DOI
- 10.1002/smll.202300053
- language
- English
- LU publication?
- yes
- id
- c756ffc2-dbca-4b66-9968-c6abacb77327
- date added to LUP
- 2023-07-14 10:05:28
- date last changed
- 2024-04-19 23:25:35
@article{c756ffc2-dbca-4b66-9968-c6abacb77327,
abstract = {{<p>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 individual 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.</p>}},
author = {{Al-Abri, Ruqaiya and Al Amairi, Nawal and Church, Stephen and Byrne, Conor and Sivakumar, Sudhakar and Walton, Alex and Magnusson, Martin H. and Parkinson, Patrick}},
issn = {{1613-6810}},
keywords = {{Bayesian; high-throughput; nanowires; photoluminescence; split-off}},
language = {{eng}},
number = {{33}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Small}},
title = {{Sub-Picosecond Carrier Dynamics Explored using Automated High-Throughput Studies of Doping Inhomogeneity within a Bayesian Framework}},
url = {{http://dx.doi.org/10.1002/smll.202300053}},
doi = {{10.1002/smll.202300053}},
volume = {{19}},
year = {{2023}},
}