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Recent Findings in Optical Research Described by Researchers from National Center for Scientific Research (CNRS)

June 17, 2014



By a News Reporter-Staff News Editor at Journal of Technology -- A new study on Optical Research is now available. According to news reporting originating from Metz, France, by VerticalNews correspondents, research stated, "Optical, electrical and structural properties of ZnO nano-pyramidal films, synthesized by chemical spray pyrolysis technique on glass substrates were investigated. A complete set of structural, optical and electrical parameters is proposed in this contribution."

Our news editors obtained a quote from the research from National Center for Scientific Research (CNRS), "ZnO films possess polycrystalline wurtzite structure showing a preferential orientation along the c-axis as confirmed by XRD measurements. The structure has been investigated by using Raman spectroscopy, at 532 nm excitation source and the morphology is characterized by scanning electron microscopy (SEM). Link to the specific growing parameters, the morphology of the so-obtained films is rarely observed in nanostructures family with a diameter of ZnO hexagonal nano-pyramids in the range of 50-150 nm smaller than this usually obtained by spray pyrolysis. The strong peaks of the E-2 Raman mode at 99.3 cm(-1) (low) and 439.4 cm(-1) (high), indicate a good crystal quality of the ZnO nano-pyramids. The existence of a compressive stress in the ZnO structure was pointed out by Raman scattering and estimated by XRD measurements. High optical transmittance value of the film above 90% in the visible region was observed and the optical band gap was found to be 3.273 eV at room temperature. The photoluminescence (PL) spectrum of ZnO hexagonal pyramid shows an intensity ratio of the UV emission to the visible band more than 20."

According to the news editors, the research concluded: "By electrical characterizations of the ZnO films, we obtained the values of the resistivity and Hall mobility equal to 17 Omega cm and 8.49 cm(2)V(-1) s(-1), respectively."

For more information on this research see: Optical, electrical and structural properties of nano-pyramidal ZnO films grown on glass substrate by spray pyrolysis technique. Optical Materials, 2014;36(7):1123-1130. Optical Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Optical Materials - www.elsevier.com/wps/product/cws_home/522512)

The news editors report that additional information may be obtained by contacting A. Bedia, Lorraine Univ, UMR CNRS LEM3 7239, F-57000 Metz, France. Additional authors for this research include F.Z. Bedia, M. Aillerie, N. Maloufi, S.O.S. Hamady, O. Perroud and B. Benyoucef.

Keywords for this news article include: Metz, France, Europe, Optical Research

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Source: Journal of Technology


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