Nature and Control of Shakeup Processes in Colloidal Nanoplatelets
![Thumbnail](/xmlui/bitstream/handle/10234/192557/73888.pdf.jpg?sequence=4&isAllowed=y)
View/ Open
Metadata
Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
comunitat-uji-handle4:
INVESTIGACIONMetadata
Title
Nature and Control of Shakeup Processes in Colloidal NanoplateletsDate
2020-10-29Publisher
American Chemical SocietyISSN
2330-4022Bibliographic citation
LLUSAR, Jordi; CLIMENTE, Juan I. Nature and Control of Shakeup Processes in Colloidal Nanoplatelets. ACS Photonics, 2020, vol. 7, no 11, p. 3086-3095.Type
info:eu-repo/semantics/articlePublisher version
https://pubs.acs.org/doi/10.1021/acsphotonics.0c01160Version
info:eu-repo/semantics/acceptedVersionSubject
Abstract
Recent experiments suggest that the photoluminescence line
width of CdSe nanoplatelets (NPLs) and core/shell CdSe/CdS NPLs may be
broadened by the presence of shakeup (SU) lines from negatively charged
trions. We ... [+]
Recent experiments suggest that the photoluminescence line
width of CdSe nanoplatelets (NPLs) and core/shell CdSe/CdS NPLs may be
broadened by the presence of shakeup (SU) lines from negatively charged
trions. We carry out a theoretical analysis, based on effective mass and
configuration interaction (CI) simulations, to identify the physical conditions
that enable such processes. We confirm that trions in colloidal NPLs are
susceptible of presenting SU lines up to 1 order of magnitude stronger than in
epitaxial quantum wells, stimulated by dielectric confinement. For these
processes to take place, trions must be weakly bound to off-centered charge
traps, which relax symmetry selection rules. Charges on the lateral sidewalls are
particularly efficient to this end. Our simulations display a single strong SU
replica in most instances, which agrees well with experiments on CdSe NPLs, but suggests that the multipeaked emission reported
for core/shell CdSe/CdS NPLs must involve other factors beyond SU processes. We propose emission from a metastable spin triplet
trion state may be responsible. Understanding the origin of SU processes may open paths to rational design of NPLs with narrower
line width. [-]
Is part of
ACS Photonics, 2020, vol. 7, no 11.Funder Name
MICINN Project
Project code
CTQ2017-83781-P
Rights
Copyright © 2020 American Chemical Society. “This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsphotonics.0c01160.”
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
This item appears in the folowing collection(s)
- QFA_Articles [825]