Electron and Hole g-Factors and Spin Dynamics of Negatively Charged Excitons in CdSe/CdS Colloidal Nanoplatelets with Thick Shells

Elena V. Shornikova; Louis Biadala; Dmitri R. Yakovlev; Donghai Feng; Victor F. Sapega; Nathan Flipo; Aleksandr A. Golovatenko; Marina A. Semina; Anna V. Rodina; Anatolie A. Mitioglu; Mariana V. Ballottin; Peter C.M. Christianen; Yuri G. Kusrayev; Michel Nasilowski; Benoit Dubertret; Manfred Bayer

doi:10.1021/acs.nanolett.7b04203

Electron and Hole g-Factors and Spin Dynamics of Negatively Charged Excitons in CdSe/CdS Colloidal Nanoplatelets with Thick Shells

Elena V. Shornikova, Louis Biadala, Dmitri R. Yakovlev, Donghai Feng, Victor F. Sapega, Nathan Flipo, Aleksandr A. Golovatenko, Marina A. Semina, Anna V. Rodina, Anatolie A. Mitioglu, Mariana V. Ballottin, Peter C.M. Christianen, Yuri G. Kusrayev, Michel Nasilowski, Benoit Dubertret, Manfred Bayer

Institute for Advanced Study in Precision Spectroscopy

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

We address spin properties and spin dynamics of carriers and charged excitons in CdSe/CdS colloidal nanoplatelets with thick shells. Magneto-optical studies are performed by time-resolved and polarization-resolved photoluminescence, spin-flip Raman scattering and picosecond pump-probe Faraday rotation in magnetic fields up to 30 T. We show that at low temperatures the nanoplatelets are negatively charged so that their photoluminescence is dominated by radiative recombination of negatively charged excitons (trions). Electron g-factor of 1.68 is measured, and heavy-hole g-factor varying with increasing magnetic field from -0.4 to -0.7 is evaluated. Hole g-factors for two-dimensional structures are calculated for various hole confining potentials for cubic- and wurtzite lattice in CdSe core. These calculations are extended for various quantum dots and nanoplatelets based on II-VI semiconductors. We developed a magneto-optical technique for the quantitative evaluation of the nanoplatelets orientation in ensemble.

Original language	English
Pages (from-to)	373-380
Number of pages	8
Journal	Nano Letters
Volume	18
Issue number	1
DOIs	https://doi.org/10.1021/acs.nanolett.7b04203
State	Published - 10 Jan 2018

Keywords

CdSe
Nanoplatelets
core/shell nanocrystals
spin dynamics
trion

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10.1021/acs.nanolett.7b04203

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Shornikova, E. V., Biadala, L., Yakovlev, D. R., Feng, D., Sapega, V. F., Flipo, N., Golovatenko, A. A., Semina, M. A., Rodina, A. V., Mitioglu, A. A., Ballottin, M. V., Christianen, P. C. M., Kusrayev, Y. G., Nasilowski, M., Dubertret, B., & Bayer, M. (2018). Electron and Hole g-Factors and Spin Dynamics of Negatively Charged Excitons in CdSe/CdS Colloidal Nanoplatelets with Thick Shells. Nano Letters, 18(1), 373-380. https://doi.org/10.1021/acs.nanolett.7b04203

@article{3ac1e5e1bd4643e89014ff91fff68887,

title = "Electron and Hole g-Factors and Spin Dynamics of Negatively Charged Excitons in CdSe/CdS Colloidal Nanoplatelets with Thick Shells",

abstract = "We address spin properties and spin dynamics of carriers and charged excitons in CdSe/CdS colloidal nanoplatelets with thick shells. Magneto-optical studies are performed by time-resolved and polarization-resolved photoluminescence, spin-flip Raman scattering and picosecond pump-probe Faraday rotation in magnetic fields up to 30 T. We show that at low temperatures the nanoplatelets are negatively charged so that their photoluminescence is dominated by radiative recombination of negatively charged excitons (trions). Electron g-factor of 1.68 is measured, and heavy-hole g-factor varying with increasing magnetic field from -0.4 to -0.7 is evaluated. Hole g-factors for two-dimensional structures are calculated for various hole confining potentials for cubic- and wurtzite lattice in CdSe core. These calculations are extended for various quantum dots and nanoplatelets based on II-VI semiconductors. We developed a magneto-optical technique for the quantitative evaluation of the nanoplatelets orientation in ensemble.",

keywords = "CdSe, Nanoplatelets, core/shell nanocrystals, spin dynamics, trion",

author = "Shornikova, \{Elena V.\} and Louis Biadala and Yakovlev, \{Dmitri R.\} and Donghai Feng and Sapega, \{Victor F.\} and Nathan Flipo and Golovatenko, \{Aleksandr A.\} and Semina, \{Marina A.\} and Rodina, \{Anna V.\} and Mitioglu, \{Anatolie A.\} and Ballottin, \{Mariana V.\} and Christianen, \{Peter C.M.\} and Kusrayev, \{Yuri G.\} and Michel Nasilowski and Benoit Dubertret and Manfred Bayer",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2018",

month = jan,

day = "10",

doi = "10.1021/acs.nanolett.7b04203",

language = "英语",

volume = "18",

pages = "373--380",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "1",

}

Shornikova, EV, Biadala, L, Yakovlev, DR, Feng, D, Sapega, VF, Flipo, N, Golovatenko, AA, Semina, MA, Rodina, AV, Mitioglu, AA, Ballottin, MV, Christianen, PCM, Kusrayev, YG, Nasilowski, M, Dubertret, B & Bayer, M 2018, 'Electron and Hole g-Factors and Spin Dynamics of Negatively Charged Excitons in CdSe/CdS Colloidal Nanoplatelets with Thick Shells', Nano Letters, vol. 18, no. 1, pp. 373-380. https://doi.org/10.1021/acs.nanolett.7b04203

TY - JOUR

T1 - Electron and Hole g-Factors and Spin Dynamics of Negatively Charged Excitons in CdSe/CdS Colloidal Nanoplatelets with Thick Shells

AU - Shornikova, Elena V.

AU - Biadala, Louis

AU - Yakovlev, Dmitri R.

AU - Feng, Donghai

AU - Sapega, Victor F.

AU - Flipo, Nathan

AU - Golovatenko, Aleksandr A.

AU - Semina, Marina A.

AU - Rodina, Anna V.

AU - Mitioglu, Anatolie A.

AU - Ballottin, Mariana V.

AU - Christianen, Peter C.M.

AU - Kusrayev, Yuri G.

AU - Nasilowski, Michel

AU - Dubertret, Benoit

AU - Bayer, Manfred

PY - 2018/1/10

Y1 - 2018/1/10

N2 - We address spin properties and spin dynamics of carriers and charged excitons in CdSe/CdS colloidal nanoplatelets with thick shells. Magneto-optical studies are performed by time-resolved and polarization-resolved photoluminescence, spin-flip Raman scattering and picosecond pump-probe Faraday rotation in magnetic fields up to 30 T. We show that at low temperatures the nanoplatelets are negatively charged so that their photoluminescence is dominated by radiative recombination of negatively charged excitons (trions). Electron g-factor of 1.68 is measured, and heavy-hole g-factor varying with increasing magnetic field from -0.4 to -0.7 is evaluated. Hole g-factors for two-dimensional structures are calculated for various hole confining potentials for cubic- and wurtzite lattice in CdSe core. These calculations are extended for various quantum dots and nanoplatelets based on II-VI semiconductors. We developed a magneto-optical technique for the quantitative evaluation of the nanoplatelets orientation in ensemble.

AB - We address spin properties and spin dynamics of carriers and charged excitons in CdSe/CdS colloidal nanoplatelets with thick shells. Magneto-optical studies are performed by time-resolved and polarization-resolved photoluminescence, spin-flip Raman scattering and picosecond pump-probe Faraday rotation in magnetic fields up to 30 T. We show that at low temperatures the nanoplatelets are negatively charged so that their photoluminescence is dominated by radiative recombination of negatively charged excitons (trions). Electron g-factor of 1.68 is measured, and heavy-hole g-factor varying with increasing magnetic field from -0.4 to -0.7 is evaluated. Hole g-factors for two-dimensional structures are calculated for various hole confining potentials for cubic- and wurtzite lattice in CdSe core. These calculations are extended for various quantum dots and nanoplatelets based on II-VI semiconductors. We developed a magneto-optical technique for the quantitative evaluation of the nanoplatelets orientation in ensemble.

KW - CdSe

KW - Nanoplatelets

KW - core/shell nanocrystals

KW - spin dynamics

KW - trion

UR - https://www.scopus.com/pages/publications/85040312253

U2 - 10.1021/acs.nanolett.7b04203

DO - 10.1021/acs.nanolett.7b04203

M3 - 文章

C2 - 29160075

AN - SCOPUS:85040312253

SN - 1530-6984

VL - 18

SP - 373

EP - 380

JO - Nano Letters

JF - Nano Letters

IS - 1

ER -

Electron and Hole g-Factors and Spin Dynamics of Negatively Charged Excitons in CdSe/CdS Colloidal Nanoplatelets with Thick Shells

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Keywords

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