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Applied Physics Letters / Volume 96 / Issue 7 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 96, 073102 (2010); http://dx.doi.org/10.1063/1.3291049 (3 pages)

Comparative photoluminescence study of close-packed and colloidal InP/ZnS quantum dots

Ung Thi Dieu Thuy1,2, Pham Thi Thuy1,3, Nguyen Quang Liem1, Liang Li2, and Peter Reiss2

1Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
2CEA Grenoble, DSM/INAC/SPrAM (UMR 5819 CEA-CNRS-Université Joseph Fourier)/LEMOH, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
3Baria-Vungtau Commune College, National Road 51C, Dist 11, Vungtau City, Vietnam

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(Received 18 November 2009; accepted 16 December 2009; published online 16 February 2010)

This letter reports on the comparative photoluminescence study of InP/ZnS quantum dots in the close-packed solid state and in colloidal solution. The steady-state photoluminescence spectrum of the close-packed InP/ZnS quantum dots peaks at a longer wavelength than that of the colloidal ones. Time-resolved photoluminescence shows that the close-packed quantum dots possess a shorter luminescence decay time and strongly increased spectral shift with the time delayed from the excitation moment in comparison with the colloidal ones. The observed behavior is discussed on the basis of energy transfer enabled by the short interparticle distance between the close-packed quantum dots.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

colloids, excited states, III-V semiconductors, II-VI semiconductors, indium compounds, photoluminescence, semiconductor quantum dots, spectral line shift, time resolved spectra, zinc compounds

PACS

  • 78.67.Hc

    Quantum dots

  • 78.47.jd

    Time resolved luminescence

  • 78.55.Cr

    III-V semiconductors

  • 78.55.Et

    II-VI semiconductors

  • 78.47.da

    Excited states

  • 68.65.-k

    Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3291049

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    U. T. D. Thuy, N. Q. Liem, D. X. Thanh, M. Protière, and P. Reiss, Appl. Phys. Lett. 91, 241908 (2007)APPLAB000091000024241908000001.

    S. A. Crooker, J. A. Hollingsworth, S. Tretiak, and V. I. Klimov, Phys. Rev. Lett. 89, 186802 (2002).


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