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Photoluminescent Properties of Nanoscaled Zn2SiO4:Mn2+ Green Phosphor Under Vacuum Ultraviolet Excitation

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Nanoscaled Zn2SiO4:Mn2+ green phosphor was synthesized through the hydrothermal method using Zn(CH3COO)2, Mn(CH3COO)2, and (C2H5O)4Si as starting materials. According to the XRD results, the pure hexagonal structured zinc silicate nanophosphor could be synthesized at a low temperature of 140 °C. The TEM image showed that the obtained nanophosphor was composed of rod-like particles with average diameter of 100 nm and length of 150 nm. When the cetyltrimethyl ammonium bromide as the surfactant molecules was adopted into the hydrothermal procedure, the morphology and the particle size of the phosphor could be controlled. The uniform spherical nanoparticles with the diameter of 60 nm were synthesized. Under vacuum ultraviolet excitation, the nanoscaled Zn2SiO4:Mn2+ phosphor exhibited the strongest broad emission at about 523 nm which attributed to the 4T16A1 transition of Mn2+. The photoluminescence intensity of the phosphors increased along with the increasing hydrothermal temperature due to higher crystallinity. It was found that the Zn2SiO4:Mn2+ nanospheres had higher photoluminescence intensity than the rod-like particles due to fewer defects, which provide non-radiative recombination routes in the Zn2SiO4:Mn2+ nanosphere phosphors.


Document Type: Research Article


Publication date: March 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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