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Nanocomposites of
poly[(2-methoxy,5-octoxy)1,4-phenylenevinylene]-zinc selenide
(MOPPV-ZnSe) are synthesized by mixing the polymerization of 1,4-bis
(chloromethyl)-2-methoxy-5-octoxy-benzene in the presence of ZnSe
quantum dots. The resulting MOPPV-ZnSe nanocomposites possess a
well-defined interfacial contact, thus significantly promoting the
dispersion of ZnSe within the MOPPV matrix and facilitating the
electronic interaction between these two components. Raman and
UV--visible absorption spectra are influenced by the incorporation
of ZnSe nanocrystals. High-resolution transmission electron
microscopic and tapping-mode atomic force microscopic results show
clearly the evidence for phase-segregated networks of ZnSe
nanocrystals, which provide a large area of interface for charge
separation to occur. Steady-state spectra of MOPPV-ZnSe
nanocomposites are markedly quenched by the introduction of intimate
polymer/ZnSe junctions. Time-resolved photoluminescence
measurements show that the lifetime decays quickly, which further
confirms the occurrence of charge transfer in MOPPV-ZnSe
nanocomposites. 相似文献
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