Optical properties of ZnO/PMMA nanocomposite films

The ZnO nanocrystals (ZnO NCs) with particle size, less than 100 nm, have been blended with polymethylmethacrylate (PMMA) by solution mixing to prepare PMMA/ZnO nanocomposite films. The structure of ZnO/PMMA nanocomposite films was characterized using X-ray diffractometry. The prepared nanocomposite...

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Veröffentlicht in:	Journal of alloys and compounds 2010-07, Vol.502 (1), p.24-27
Hauptverfasser:	Kulyk, B., Kapustianyk, V., Tsybulskyy, V., Krupka, O., Sahraoui, B.
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Chemical Sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Emission Evolution Exact sciences and technology Nanocomposites Nanomaterials Nanostructure Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of bulk materials and thin films Photoluminescence Physics PMMA Polymethyl methacrylates Solid organic materials Varshni formula Zinc oxide ZnO nanocrystals
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Zusammenfassung:	The ZnO nanocrystals (ZnO NCs) with particle size, less than 100 nm, have been blended with polymethylmethacrylate (PMMA) by solution mixing to prepare PMMA/ZnO nanocomposite films. The structure of ZnO/PMMA nanocomposite films was characterized using X-ray diffractometry. The prepared nanocomposite films are highly transparent and a clear excitonic peak is observed in their absorption spectra. Measurements of temperature evolution of the photoluminescence (PL) spectra show intensive UV emission peak corresponding to the donor-bound excitons with binding energy of 51 meV and green emission band related to the intrinsic defects in ZnO. The temperature evolution of the emission peaks energy position, intensity and integral intensity in ZnO/PMMA nanocomposite films were examined.
ISSN:	0925-8388 1873-4669
DOI:	10.1016/j.jallcom.2010.04.162