Ultrathin Highly Luminescent Two‐Monolayer Colloidal CdSe Nanoplatelets
Sign Up to like & getrecommendations! Published in 2019 at "Advanced Functional Materials"
DOI: 10.1002/adfm.201901028
Abstract: Surface effects in atomically flat colloidal CdSe nanoplatelets (NLPs) are significantly and increasingly important with their thickness being reduced to subnanometer level, generating strong surface related deep trap photoluminescence emission alongside the bandedge emission. Herein,… read more here.
Keywords: two monolayer; luminescent two; highly luminescent; cdse nanoplatelets ... See more keywords
Exciton Binding Energy in CdSe Nanoplatelets Measured by One- and Two-Photon Absorption
Sign Up to like & getrecommendations! Published in 2021 at "Nano Letters"
DOI: 10.1021/acs.nanolett.1c04159
Abstract: Colloidal semiconductor nanoplatelets exhibit strong quantum confinement for electrons and holes as well as excitons in one dimension, while their in-plane motion is free. Because of the large dielectric contrast between the semiconductor and its… read more here.
Keywords: exciton binding; two photon; cdse nanoplatelets; one two ... See more keywords
Excitonic Spin-Coherence Lifetimes in CdSe Nanoplatelets Increase Significantly with Core/Shell Morphology.
Sign Up to like & getrecommendations! Published in 2022 at "Nano letters"
DOI: 10.1021/acs.nanolett.2c04845
Abstract: We report spin-polarized transient absorption for colloidal CdSe nanoplatelets as functions of thickness (2-6 monolayer thickness) and core/shell motif. Using electro-optical modulation of co- and cross-polarization pump-probe combinations, we sensitively observe spin-polarized transitions. Core-only nanoplatelets… read more here.
Keywords: core shell; coherence; cdse nanoplatelets; spin coherence ... See more keywords
Negatively charged excitons in CdSe nanoplatelets.
Sign Up to like & getrecommendations! Published in 2020 at "Nano letters"
DOI: 10.1021/acs.nanolett.9b04907
Abstract: The low-temperature emission spectrum of CdSe colloidal nanoplatelets (NPLs) consists of two narrow lines. The high-energy line stems from the recombination of neutral excitons. The origin of the low-energy line is currently debated. We experimentally… read more here.
Keywords: negatively charged; energy line; cdse nanoplatelets; charged excitons ... See more keywords
Surface spin magnetism controls the polarized exciton emission from CdSe nanoplatelets
Sign Up to like & getrecommendations! Published in 2020 at "Nature Nanotechnology"
DOI: 10.1038/s41565-019-0631-7
Abstract: The surface of nominally diamagnetic colloidal CdSe nanoplatelets can demonstrate paramagnetic behaviour owing to the uncompensated spins of dangling bonds, as we reveal here by optical spectroscopy in high magnetic fields up to 15 T… read more here.
Keywords: magnetism; cdse nanoplatelets; exciton emission; surface spin ... See more keywords
Biexcitons in CdSe nanoplatelets: geometry, binding energy and radiative rate.
Sign Up to like & getrecommendations! Published in 2022 at "Nanoscale"
DOI: 10.1039/d2nr01354a
Abstract: Biexciton properties in semiconductor nanostructures are highly sensitive to quantum confinement, relative electron-hole masses, dielectric environment and Coulomb correlations. Here we present a variational Quantum Monte Carlo model which, coupled to effective mass Hamiltonians, takes… read more here.
Keywords: binding energy; geometry; cdse nanoplatelets; biexcitons cdse ... See more keywords
Explaining observed stability of excitons in highly excited CdSe nanoplatelets
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.245302
Abstract: Two-dimensional electron-hole gases in colloidal semiconductors have a wide variety of applications. Therefore, a proper physical understanding of these materials is of great importance. In this paper we present a detailed theoretical analysis of the… read more here.
Keywords: excitons highly; explaining observed; observed stability; cdse nanoplatelets ... See more keywords