By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Luminescence. According to news reporting out of Port Elizabeth, South Africa, by NewsRx editors, research stated, "Ce3+ doped ZnO flower-like structures were synthesized by the chemical bath deposition method (CBD). The influence of Ce3+ as a dopant on the crystallization, surface morphology, optical and luminescent properties of ZnO flowers-like structures were investigated."
Our news journalists obtained a quote from the research from Nelson Mandela Metropolitan University, "The X-ray diffraction (XRD) spectra of the ZnO:Ce3+ nanostructures correspond to the various planes of a single hexagonal ZnO phase for the lower Ce concentration samples. The estimated grain sizes calculated using the XRD spectra were found to be in order of 42 +/- 2 nm. The grain size was found to be not dependent on the concentration of the Ce3+ ions used up to 3 mol% of Ce. Scanning Auger electron microscopy and scanning electron micrographs indicate that the addition of Ce3+ influence the morphology of the samples. The flower-like structures obtained for the undoped and low concentration Ce doped ZnO changed into a mixed structure with the emergence of pyramid shapes for higher concentration Ce doped samples. The solid undoped and low concentration Ce doped powder showed good optical properties with a high reflectance in the visible regions. The properties, however, diminished at higher Ce concentration. The band gap energies decreased linearly with concentration from 3.0 +/- 0.1 to 2.4 +/- 0.3 eV for ZnO:0 mol% Ce3+ up to ZnO:10 mol% Ce3+. Under 248 nm excitation, the undoped and low concentration Ce doped ZnO flower-like rods exhibited a green emission, peaking at about 559 nm. The higher Ce concentration (0.3 mol% and above) was emitted at 436 and 503 nm due to the Ce transitions."
According to the news editors, the research concluded: "The intensity of these emission spectra of the ZnO:Ce3+ decreased with the addition of more Ce3+ ions."
For more information on this research see: The effect of Ce3+ on structure, morphology and optical properties of flower-like ZnO synthesized using the chemical bath method. Journal of Luminescence, 2013;143():463-468. Journal of Luminescence can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Luminescence - www.elsevier.com/wps/product/cws_home/505700)
Our news journalists report that additional information may be obtained by contacting L.F. Koao, Nelson Mandela Metropolitan Univsity, Dept. of Phys, ZA-6031 Port Elizabeth, South Africa. Additional authors for this research include F.B. Dejene, H.C. Swart and J.R. Botha (see also Luminescence).
Keywords for this news article include: South Africa, Luminescence, Port Elizabeth
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC