Direct Measurement of g-Factors in II-VI and III-V Core-Shell Nanocrystals

L. Fradkin; L. Langof; E. Lifshitz; N. Gaponik; A. Rogach; A. Eychmüller; H. Weller; O. I. Micic; A. J. Nozik

doi:10.1016/j.physe.2004.08.013

Direct Measurement of g-Factors in II-VI and III-V Core-Shell Nanocrystals

L. Fradkin, L. Langof, E. Lifshitz, N. Gaponik, A. Rogach, A. Eychmüller, H. Weller, O. I. Micic, A. J. Nozik

Chemistry and Nanoscience

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

5 Scopus Citations

Abstract

This study describes a direct measurement of spectroscopic g-factors of photo-generated carriers in InP/ZnS and HgTe/Hg_xCd_1- _xTe(S) core-shell nanocrystals. The g-factor of trapped electrons and their spin-lattice versus radiative relaxation ratio (T₁/τ) were measured by the use of continuous-wave and time-resolved optically detected magnetic resonance (ODMR) spectroscopy. The g-factors of excitons and donor-hole pairs were derived by the use of field-induced circular-polarized photoluminescence (CP-PL) spectroscopy. The combined information enabled to determine the g-factors of the individual band-edge electrons and holes. The results suggested an increase of the g-factor of the exciton and conduction electron with a decrease of the nanocrystal size.

Original language	American English
Pages (from-to)	9-13
Number of pages	5
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	26
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physe.2004.08.013 https://doi.org/10.1016/j.physe.2004.08.013
State	Published - Feb 2005
Event	International Conference on Quantum Dots - Banff, Alberta, Canada Duration: 10 May 2004 → 13 May 2004

NREL Publication Number

NREL/JA-590-38381

Keywords

Colloidal quantum dots
Core-shell nanocrystals
g-factors
ODMR

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@article{c2251d758e874d3ea6019e11b7399605,

title = "Direct Measurement of g-Factors in II-VI and III-V Core-Shell Nanocrystals",

abstract = "This study describes a direct measurement of spectroscopic g-factors of photo-generated carriers in InP/ZnS and HgTe/HgxCd1- xTe(S) core-shell nanocrystals. The g-factor of trapped electrons and their spin-lattice versus radiative relaxation ratio (T1/τ) were measured by the use of continuous-wave and time-resolved optically detected magnetic resonance (ODMR) spectroscopy. The g-factors of excitons and donor-hole pairs were derived by the use of field-induced circular-polarized photoluminescence (CP-PL) spectroscopy. The combined information enabled to determine the g-factors of the individual band-edge electrons and holes. The results suggested an increase of the g-factor of the exciton and conduction electron with a decrease of the nanocrystal size.",

keywords = "Colloidal quantum dots, Core-shell nanocrystals, g-factors, ODMR",

author = "L. Fradkin and L. Langof and E. Lifshitz and N. Gaponik and A. Rogach and A. Eychm{\"u}ller and H. Weller and Micic, {O. I.} and Nozik, {A. J.}",

year = "2005",

month = feb,

doi = "10.1016/j.physe.2004.08.013",

language = "American English",

volume = "26",

pages = "9--13",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier B.V.",

number = "1-4",

note = "International Conference on Quantum Dots ; Conference date: 10-05-2004 Through 13-05-2004",

}

TY - JOUR

T1 - Direct Measurement of g-Factors in II-VI and III-V Core-Shell Nanocrystals

AU - Fradkin, L.

AU - Langof, L.

AU - Lifshitz, E.

AU - Gaponik, N.

AU - Rogach, A.

AU - Eychmüller, A.

AU - Weller, H.

AU - Micic, O. I.

AU - Nozik, A. J.

PY - 2005/2

Y1 - 2005/2

N2 - This study describes a direct measurement of spectroscopic g-factors of photo-generated carriers in InP/ZnS and HgTe/HgxCd1- xTe(S) core-shell nanocrystals. The g-factor of trapped electrons and their spin-lattice versus radiative relaxation ratio (T1/τ) were measured by the use of continuous-wave and time-resolved optically detected magnetic resonance (ODMR) spectroscopy. The g-factors of excitons and donor-hole pairs were derived by the use of field-induced circular-polarized photoluminescence (CP-PL) spectroscopy. The combined information enabled to determine the g-factors of the individual band-edge electrons and holes. The results suggested an increase of the g-factor of the exciton and conduction electron with a decrease of the nanocrystal size.

AB - This study describes a direct measurement of spectroscopic g-factors of photo-generated carriers in InP/ZnS and HgTe/HgxCd1- xTe(S) core-shell nanocrystals. The g-factor of trapped electrons and their spin-lattice versus radiative relaxation ratio (T1/τ) were measured by the use of continuous-wave and time-resolved optically detected magnetic resonance (ODMR) spectroscopy. The g-factors of excitons and donor-hole pairs were derived by the use of field-induced circular-polarized photoluminescence (CP-PL) spectroscopy. The combined information enabled to determine the g-factors of the individual band-edge electrons and holes. The results suggested an increase of the g-factor of the exciton and conduction electron with a decrease of the nanocrystal size.

KW - Colloidal quantum dots

KW - Core-shell nanocrystals

KW - g-factors

KW - ODMR

UR - http://www.scopus.com/inward/record.url?scp=13444259680&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2004.08.013

DO - 10.1016/j.physe.2004.08.013

M3 - Article

AN - SCOPUS:13444259680

SN - 1386-9477

VL - 26

SP - 9

EP - 13

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-4

T2 - International Conference on Quantum Dots

Y2 - 10 May 2004 through 13 May 2004

ER -

Direct Measurement of g-Factors in II-VI and III-V Core-Shell Nanocrystals

Abstract

NREL Publication Number

Keywords

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