Photoluminescence (PL) of poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV) in the presence
of Silver nanoparticles (NP) is studied. The purpose of this research is to understand the PL distance
dependence of plasmon-polymer separation and a correlation between the surface enhanced fluorescence (SEF)
and polymer molecular weight. Distinct peaks in PL are found for plasmon-polymer separations ranging from
near the far field to the near field, under 100 nm. Extinction of the devices shows that changes in absorption
cannot explain all enhancement in PL and suggests that a modification of the radiative lifetime is modified. The
dependence of the photoluminescence of MEH-PPV on molecular weight shows variation but overall suggests
chain length does not affect film quenching. This is largely attributed to the large polydispersity of the polymer
materials used.
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