Localization and interdot carrier transfer in CdSe and CdZnMnSe quantum dots determined by cw and time-resolved photoluminescence

J. H. Park; D. G. Choi; T. K. Lee; Eunsoon Oh; Sanghoon Lee; J. K. Furdyna

doi:10.1063/1.2740484

Localization and interdot carrier transfer in CdSe and CdZnMnSe quantum dots determined by cw and time-resolved photoluminescence

J. H. Park, D. G. Choi, T. K. Lee, Eunsoon Oh, Sanghoon Lee, J. K. Furdyna

Department of Physics

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

15 Citations (Scopus)

Abstract

The authors compared time-integrated and time-resolved photoluminescence (PL) emitted by CdSe quantum dots (QDs) and by CdZnMnSe QDs. An unusual nonmonotonic temperature dependence of the PL shift for CdSe QDs is observed, which they ascribe to delocalization of carriers with increasing temperature. In contrast, PL emitted by CdZnMnSe QDs follows a typical monotonic redshift with temperature and exhibits a smaller temporal redshift with pulsed laser excitation than that observed for CdSe QDs. The authors suggest that the temperature PL dependence observed for CdZnMnSe QDs and the smaller localization process observed in that system arise from the shorter PL lifetime in that system.

Original language	English
Article number	201916
Journal	Applied Physics Letters
Volume	90
Issue number	20
DOIs	https://doi.org/10.1063/1.2740484
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{a4c57f1e069241c89c53765466d47e92,

title = "Localization and interdot carrier transfer in CdSe and CdZnMnSe quantum dots determined by cw and time-resolved photoluminescence",

abstract = "The authors compared time-integrated and time-resolved photoluminescence (PL) emitted by CdSe quantum dots (QDs) and by CdZnMnSe QDs. An unusual nonmonotonic temperature dependence of the PL shift for CdSe QDs is observed, which they ascribe to delocalization of carriers with increasing temperature. In contrast, PL emitted by CdZnMnSe QDs follows a typical monotonic redshift with temperature and exhibits a smaller temporal redshift with pulsed laser excitation than that observed for CdSe QDs. The authors suggest that the temperature PL dependence observed for CdZnMnSe QDs and the smaller localization process observed in that system arise from the shorter PL lifetime in that system.",

author = "Park, {J. H.} and Choi, {D. G.} and Lee, {T. K.} and Eunsoon Oh and Sanghoon Lee and Furdyna, {J. K.}",

note = "Funding Information: The authors thank Jan Gaj of Warsaw University for useful discussions and D. K. Oh at KSTAR (Korea Superconducting Tokamak Advanced Research) for experimental help. This work was supported by Korean Science and Engineering Foundation (KOSEF) (Grant No. R01-2005-000-10616-0), Basic Research Program of the Korea Science and Engineering Foundation (Grant No. R04-2003-000-10020-0), Seoul R&BD Program, and the U.S. National Science Foundation (Grant No. DMR06-03752). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

doi = "10.1063/1.2740484",

language = "English",

volume = "90",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "20",

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TY - JOUR

T1 - Localization and interdot carrier transfer in CdSe and CdZnMnSe quantum dots determined by cw and time-resolved photoluminescence

AU - Park, J. H.

AU - Choi, D. G.

AU - Lee, T. K.

AU - Oh, Eunsoon

AU - Lee, Sanghoon

AU - Furdyna, J. K.

N1 - Funding Information: The authors thank Jan Gaj of Warsaw University for useful discussions and D. K. Oh at KSTAR (Korea Superconducting Tokamak Advanced Research) for experimental help. This work was supported by Korean Science and Engineering Foundation (KOSEF) (Grant No. R01-2005-000-10616-0), Basic Research Program of the Korea Science and Engineering Foundation (Grant No. R04-2003-000-10020-0), Seoul R&BD Program, and the U.S. National Science Foundation (Grant No. DMR06-03752). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007

Y1 - 2007

N2 - The authors compared time-integrated and time-resolved photoluminescence (PL) emitted by CdSe quantum dots (QDs) and by CdZnMnSe QDs. An unusual nonmonotonic temperature dependence of the PL shift for CdSe QDs is observed, which they ascribe to delocalization of carriers with increasing temperature. In contrast, PL emitted by CdZnMnSe QDs follows a typical monotonic redshift with temperature and exhibits a smaller temporal redshift with pulsed laser excitation than that observed for CdSe QDs. The authors suggest that the temperature PL dependence observed for CdZnMnSe QDs and the smaller localization process observed in that system arise from the shorter PL lifetime in that system.

AB - The authors compared time-integrated and time-resolved photoluminescence (PL) emitted by CdSe quantum dots (QDs) and by CdZnMnSe QDs. An unusual nonmonotonic temperature dependence of the PL shift for CdSe QDs is observed, which they ascribe to delocalization of carriers with increasing temperature. In contrast, PL emitted by CdZnMnSe QDs follows a typical monotonic redshift with temperature and exhibits a smaller temporal redshift with pulsed laser excitation than that observed for CdSe QDs. The authors suggest that the temperature PL dependence observed for CdZnMnSe QDs and the smaller localization process observed in that system arise from the shorter PL lifetime in that system.

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DO - 10.1063/1.2740484

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

M1 - 201916

ER -

Localization and interdot carrier transfer in CdSe and CdZnMnSe quantum dots determined by cw and time-resolved photoluminescence

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