Electroluminescence properties of poly(3-hexylthiophene)-cadmium sulfide nanoparticles grown in situ

TitleElectroluminescence properties of poly(3-hexylthiophene)-cadmium sulfide nanoparticles grown in situ
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2011
AuthorsBorriello, C., Masala S., Bizzarro V., Nenna G., Re Marilena, Pesce Emanuela, Minarini Carla, and Di Luccio Tiziana
JournalJournal of Applied Polymer Science
KeywordsCadmium, Cadmium compounds, Cadmium sulfide, Cadmium sulfide nanoparticle, Carrier mobility, CdS, CdS nanoparticles, Conducting polymers, Different sizes, Electroluminescence properties, Electrooptical properties, Emitting layer, In-situ, Nanocomposites, Nanoparticles, Nucleation and growth, Organic conductors, Organic light-emitting devices, Poly (3-hexylthiophene), Pure polymers, Simple approach, Transmission electron, Transmission electron microscopy, X ray diffraction, X ray diffraction analysis

In this work, a simple approach to prepare luminescent poly(3- hexylthiophene)-CdS nanocomposites to be employed in organic light emitting devices (OLED) devices is reported. The nucleation and growth of CdS nanoparticles were obtained by the thermolysis of a single Cd and S precursor dispersed in the polymer at three different temperatures of annealing: 240, 265, and 300°C. In this way, it was possible to compare the properties of nanocomposites containing nanoparticles with different sizes. X-ray diffraction and transmission electron microscopy analyses confirmed the formation of CdS nanoparticles and gave information about the size, distribution, and morphology of the nanoparticles; monodispersive and very small nanoparticles with diameters below 2.5 nm were obtained at 240°C. The application of such nanocomposites as emitting layers in OLED devices is discussed. Enhanced electrooptical properties were observed for the device containing the nanocomposite annealed at 240°C with respect to the pure polymer based device. © 2011 Wiley Periodicals, Inc.


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