Issue 54, 2016, Issue in Progress

Luminescence studies for energy transfer of lead sulfide QD films

Abstract

Lead sulfide (PbS) quantum dots (QDs) of different sizes are deposited with supercritical fluid CO2 (sc-CO2) to form laterally uniform PbS quantum dot films on glass substrates as compared to other deposition methods. Fluorescence and photoluminescence (PL) spectra of PbS QDs obtained from these closely packed films prepared by the sc-CO2 method reveal effective Förster resonance energy transfer (FRET) between PbS QDs of two different sizes, while the films composed of three different sizes of PbS QDs show an even more effective FRET from the smallest to the largest particles. The FRET measured by PL is consistent with that measured by fluorescence spectroscopy at room temperature. From the PL studies of PbS QD films containing two different QD sizes, we demonstrate that the occurrence of FRET under cryogenic conditions is more efficient.

Graphical abstract: Luminescence studies for energy transfer of lead sulfide QD films

Supplementary files

Article information

Article type
Paper
Submitted
08 Feb 2016
Accepted
09 May 2016
First published
12 May 2016

RSC Adv., 2016,6, 48651-48660

Luminescence studies for energy transfer of lead sulfide QD films

J. S. Wang, B. Ullrich, A. Das, C. M. Wai, G. J. Brown, C. K. Dass and J. R. Hendrickson, RSC Adv., 2016, 6, 48651 DOI: 10.1039/C6RA03632E

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