Synthesis and optical properties of (Gd{sub 1-x},Eu{sub x}){sub 2}O{sub 2}SO{sub 4} nano-phosphors by a novel co-precipitation method
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University, Shenyang 110004 (China)
- College of Materials and Chemical Engineering, Liaoning University of Technology, Jinzhou 121001 (China)
(Gd{sub 1-x},Eu{sub x}){sub 2}O{sub 2}SO{sub 4} nano-phosphors were synthesized by a novel co-precipitation method from commercially available Gd{sub 2}O{sub 3}, Eu{sub 2}O{sub 3}, H{sub 2}SO{sub 4} and NaOH starting materials. Composition of the precursor is greatly influenced by the molar ratio of NaOH to (Gd{sub 1-x},Eu{sub x}){sub 2}(SO{sub 4}){sub 3} (the m value), and the optimal m value was found to be 4. Fourier transform infrared spectrum (FT-IR) and thermal analysis show that the precursor (m = 4) can be transformed into pure (Gd{sub 1-x},Eu{sub x}){sub 2}O{sub 2}SO{sub 4} nano-phosphor by calcining at 900 deg. C for 2 h in air. Transmission electron microscope (TEM) observation shows that the Gd{sub 2}O{sub 2}SO{sub 4} phosphor particles (m = 4) are quasi-spherical in shape and well dispersed, with a mean particle size of about 30-50 nm. Photoluminescence (PL) spectroscopy reveals that the strongest emission peak is located at 617 nm under 271 nm light excitation, which corresponds to the {sup 5}D{sub 0} {yields} {sup 7}F{sub 2} transition of Eu{sup 3+} ions. The quenching concentration of Eu{sup 3+} ions is 10 mol% and the concentration quenching mechanism is exchange interaction among the Eu{sup 3+} ions. Decay study reveals that the {sup 5}D{sub 0} {yields} {sup 7}F{sub 2} transition of Eu{sup 3+} ions has a single exponential decay behavior.
- OSTI ID:
- 22029844
- Journal Information:
- Materials Research Bulletin, Vol. 44, Issue 9; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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