Controlled synthesis and luminescence properties of Ca 0.5 Y 1-x (MoO 4 ) 2 :xRE 3+ (RE = Eu, Pr, Sm, Tb, Dy, Yb/Er, Yb/Tm, and Yb/Ho) phosphors by hydrothermal method versus pulsed laser deposition
作者： Venkatakrishnan Mahalingam , Jagannathan Thirumalai , Rajagopalan Krishnan , Rathinam Chandramohan
DOI: 10.1007/S13391-015-5248-X
关键词: Photochemistry 、 Materials science 、 Tetragonal crystal system 、 Hydrothermal synthesis 、 Thin film 、 Phosphor 、 Analytical chemistry 、 Pulsed laser deposition 、 Luminescence 、 Doping 、 Raman spectroscopy
摘要: Herein, we report on rare-earth (RE) activated Ca0.5Y1-x(MoO4)2:xRE3+ (RE = Eu, Pr, Sm, Tb, Dy, Yb/Er, Yb/Ho, and Yb/Tm) phosphors synthesized using a surfactant-mediated hydrothermal route. Timedependent experiments were performed, the morphological evolution of was studied. From prepared powder samples Eu Yb/Er), nano-sized thin phosphor films grown pulsed laser deposition (PLD). The surface topography as-grown analyzed. asprepared characterized by structural optical studies. exhibited bi pyramid-like micro-architectures. Structural studies indicated that Ca0.5Y1-x(MoO4)2 possesses scheelite tetragonal crystal structure. down-conversion luminescence Dy) as Eu3+ doped film Upon irradiation with 980 nm laser, Ca0.5Y1-x(MoO4)2: xRE3+ Yb/Er) showed intense up-converted visible emissions in green, yellow, blue regions. fluorescence decay time color co-ordinates determined for all phosphors. obtained results, are suggested to be suitable candidates display electro-luminescence applications.
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