Tunable emission from composite polymer nanoparticles based on resonance energy transfer
writer：F. Kong, X.L. Wu b, G.S. Huang, R.K. Yuan, Paul K. Chu
keywords：Nanomaterials; Organic compounds; Photoluminescence
source：期刊
specific source：Thin Solid Films 516 (2008) 6287–6292
Issue time：2008年
We have fabricated semiconducting polymer nanoparticles from poly[2-methoxy-5-(2'-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV), poly(N-vinylcarbazole) (PVK), and their blends via a reprecipitation method. When excited by the peak wavelength of the PVK absorption band, the polymer nanoparticles show enhanced emission from the MEH-PPV component. The emission color can be tuned from blue to orange–red by varying the content of the MEH-PPV component in the composite nanoparticles. Since the PVK nanoparticles have a wide photoluminescence (PL) spectrum, which overlaps well with the absorption band of the MEH-PPV nanoparticles, the PL enhancement is considered to be due to Förster energy transfer from PVK to MEH-PPV in the composite nanoparticles. Time-resolved fluorescence examinations confirm our assignment. These polymer nanoparticles are expected to have potential applications in future nano-optoelectronics.