TITLE

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

AUTHOR(S)
Ung Thi Dieu Thuy; Pham Thi Thuy; Nguyen Quang Liem; Liang Li; Reiss, Peter
PUB. DATE
February 2010
SOURCE
Applied Physics Letters;2/15/2010, Vol. 96 Issue 7, p073102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
48199546

 

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