EDTA-assisted hydrothermal synthesis of KLa(MoO4)2:Eu3+ microcrystals and their luminescence properties |
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| Affiliation: | 1. College of Electrical and Information Engineering, Shaanxi University of Science and Technology, Xi''an 710021, China;2. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi''an 710021, China;1. Crystal Growth Centre, Anna University, Chennai 600025, India;2. I3N-Aveiro, Department of Physics, University of Aveiro, Aveiro 3810 193, Portugal;3. Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8011, Japan;1. Coherent Light and Atomic and Molecular Spectroscopy Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, China;2. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun, 130033, China;3. School of Media Mathematics & Physics, Jilin Engineering Normal University, Changchun, 130012, China;1. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China;2. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu 610059, China |
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| Abstract: | Monoclinic KLa(MoO4)2:Eu3+ microarchitectures with different morphologies were synthesized by an EDTA-assisted hydrothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FT-IR) and photoluminescence (PL) spectrometer. It was found that the amounts of EDTA and the pH values of precursor solution have crucial influences on the structure, morphology and size of the obtained samples, respectively. Under 270 nm excitation, Eu3+ doped KLa(MoO4)2 samples showed red emission centered at 618 nm which attributed to 5D0→7F2 transition of Eu3+. The dependence of luminescence intensity on different morphologies were discussed in detailed. With further annealing treatment, the emission intensities of peanut-like samples increased amazingly. Moreover, the lifetime of the annealed samples were calculated. The significantly enhanced photoluminescence performances indicate that the as-annealed samples are promising phosphors which can be used for white light-emitting diodes (WLEDs). |
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| Keywords: | Hydrothermal method A Morphology C Photoluminescence C |
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