Energy transfer dynamics of nanocrystal-polymer composites.
Steady-state and time-resolved photoluminescence spectroscopy are used to examine the photoluminescent properties of nanocrystal-polymer composites consisting of colloidal PbS nanocrystals blended with poly(2-methoxy-5(2-ethylhexyloxy)-p-phenylene vinylene). Quenching of the emission from the conjugated polymer due to the PbS nanocrystals is observed along with band edge emission from the ligand capped PbS nanocrystals. A decrease in the photoluminescence lifetime of MEH-PPV is also observed in the thin film nanocrystal-polymer composite materials. Photoluminescence excitation spectroscopy of the PbS nanocrystal emission from the composite shows features attributed to MEH-PPV providing evidence of a Förster transfer process.
Warner
Jamie H
JH
Center for Biophotonics and Laser Science, Center for Quantum Computer Technology, School of Physical Sciences, The University of Queensland, Brisbane, QLD 4072, Australia. warner@physics.uq.edu.au
Watt
Andrew R
AR
Thomsen
Elizabeth
E
Heckenberg
Norman
N
Meredith
Paul
P
Rubinsztein-Dunlop
Halina
H