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Author Lahariya, Vikas
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ ABSORPTION ♦ ABSORPTION SPECTRA ♦ ABSORPTION SPECTROSCOPY ♦ CRYSTAL STRUCTURE ♦ FILMS ♦ GLASS ♦ NANOCOMPOSITES ♦ NANOSTRUCTURES ♦ OXIDATION ♦ PHOTOLUMINESCENCE ♦ PVA ♦ RECOMBINATION ♦ SELENIUM ♦ SUBSTRATES ♦ SURFACES ♦ X RADIATION ♦ X-RAY DIFFRACTION ♦ ZINC ♦ ZINC SELENIDES
Abstract The ZnSe nanocrystals have been prepared into poly vinyl alcohol(PVA) polymer matrix on glass using ZnCl2 and Na2SeSO3 as zinc and selenium source respectively. Poly vinyl Alcohol (PVA) used as polymer matrix cum capping agent due to their high viscosity and water solubility. It is transparent for visible region and prevents Se- ions to photo oxidation. The ZnSe/PVA composite film was deposited on glass substrate. The film was characterized by X Ray Diffraction (XRD) and UV-Visible absorption Spectroscopy and Photoluminescence. The X Ray Diffraction (XRD) study confirms the nanometer size (10 nm) particle formation within PVA matrix with cubic zinc blend crystal structure. The UV-Visible Absorption spectrum of ZnSe/PVA composite film shown blue shift in absorption edge indicating increased band gap due to quantum confinement. The calculated energy band gap from the absorption edge using Tauc relation is 3.4 eV. From the Photoluminescence study a broad peak at 435 nm has been observed in violet blue region due to recombination of surface states.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-06
Publisher Place United States
Volume Number 1728
Issue Number 1


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