CÁC BÀI BÁO KHOA HỌC 12:55:43 Ngày 14/08/2020 GMT+7
Study of nanostructured polymeric composites and hybrid layers used for light-emitting diodes

Nanocomposite polymeric thin films of poly(2-methoxy-5-(2-ethyl hexyloxy)phenylene vinylene) (MEH-PPV) with nano-crystalline titanium oxide (nc-TiO2) and polycarbazole (PVK) with cadmium selenide (CdSe) were fabricated by spin-coating. A 20-nm-thick nanocrystalline (molybdenum oxide) MoO3 layer prepared by using thermal oxidation was also spin-coated with a PVK film. A study of photoluminescence (PL) spectra of the polymers and nanocomposites showed an enhancement in the photoluminescence from the nanocomposites. Moreover, MEH-PPV+nc-TiO2 composites exhibited a blue-shift of the PL spectrum as compared to that of the polymer film. The current-voltage characteristics of the Mo/nc-MoO3/PVK/Al-Au structures show that a semitransparent metallic coating or a transparent polymer can serve as a cathode in devices with enhanced charge carrier injection.

 Dinh N.N., Chi L.H., Thuy T.T.C., Thanh D.V., Nguyen T.P.
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