Study on preparation and luminescent properties of Eu{sup 3+}-doped LaAlO{sub 3} and GdAlO{sub 3}
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012 (China)
- State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)
Graphical abstract: The optical property of Eu{sup 3+} ions is seriously influenced by the two kinds of host materials of LaAlO{sub 3} and GdAlO{sub 3}, especially the charge transfer (CT) band energy of Eu{sup 3+}-O{sup 2-}. We have discussed it in detail based on experiments and quantitative calculations. Highlights: Black-Right-Pointing-Pointer Ln{sub 1-x}AlO{sub 3}:Eu{sub x}{sup 3+} (Ln = La, Gd) phosphors were prepared by sol-gel method. Black-Right-Pointing-Pointer The optical properties of Ln{sub 1-x}AlO{sub 3}:Eu{sub x}{sup 3+} (Ln = La, Gd) phosphors have been investigated in detail. Black-Right-Pointing-Pointer We quantitatively calculated the bond lengths and bond covalency of Gd-O and La-O bonds. Black-Right-Pointing-Pointer The calculated charge transfer energies of Eu{sup 3+}-doped LnAlO{sub 3} (Ln = La, Gd) are in good agreement with our experimental results. -- Abstract: Eu{sup 3+}-doped trigonal LaAlO{sub 3} and orthorhombic GdAlO{sub 3} phosphors have been successfully synthesized by sol-gel method. The crystallization processes of the phosphors have been characterized by X-ray diffraction (XRD) and thermogravimetry-differential scanning calorimetry (TG-DSC). The optical properties of these phosphors were investigated using the photoluminescence (PL) and photoluminescence excitation (PLE) spectra. The influences of the different structures and bonding of the hosts on the luminescence performance of Eu{sup 3+} ion-doped LaAlO{sub 3} and GdAlO{sub 3} were investigated in detail based on chemical bond theory. Under appropriate UV-radiation, the reddish orange light emitted from GdAlO{sub 3}:Eu{sup 3+} was brighter than that from LaAlO{sub 3}:Eu{sup 3+}. Such a brightly luminescent phosphor could be considered as an ideal optical material for the development of new optical display systems.
- OSTI ID:
- 22212403
- Journal Information:
- Materials Research Bulletin, Vol. 47, Issue 2; Other Information: Copyright (c) 2011 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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