Local structure and structural rigidity of the green phosphor β-SiAlON:Eu{sup 2+}
- Mitsubishi Chemical Center for Advanced Materials, University of California, Santa Barbara, California 93106 (United States)
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Mitsubishi Chemical Group Science and Technology Research Center, Inc., 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-8502 (Japan)
Eu{sup 2+} inserted in β-Si{sub 3−x}Al{sub x}O{sub x}N{sub 4−x} is a material that shows exceptional promise as a green-emitting phosphor. Synchrotron X-ray and neutron scattering, in conjunction with first-principles calculations and Eu L{sub 3} X-ray absorption measurements, yield a consistent picture of the composition, and the favorable position for Eu{sup 2+} substitution in the crystal structure. The Debye temperature Θ{sub D}, which is a proxy for structural rigidity relating to effectiveness as a phosphor, is very high for the starting β-Si{sub 3}N{sub 4} framework and is determined to decrease only slightly for the small amounts of Al{sup 3+} and O{sup 2−} co-substitution that are required for charge balance associated with Eu{sup 2+} insertion.
- OSTI ID:
- 22391901
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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