skip to main content

Title: Local structure and structural rigidity of the green phosphor β-SiAlON:Eu{sup 2+}

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.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Mitsubishi Chemical Center for Advanced Materials, University of California, Santa Barbara, California 93106 (United States)
  2. (United States)
  3. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  4. Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  5. Mitsubishi Chemical Group Science and Technology Research Center, Inc., 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-8502 (Japan)
Publication Date:
OSTI Identifier:
22391901
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM IONS; ALUMINIUM OXIDES; CRYSTAL STRUCTURE; DEBYE TEMPERATURE; EUROPIUM IONS; NEUTRON DIFFRACTION; SILICON NITRIDES; SYNCHROTRON RADIATION; SYNCHROTRONS; X RADIATION