期刊
APPLIED PHYSICS LETTERS
卷 105, 期 18, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4901104
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资金
- Natural Sciences and Engineering Council of Canada through NSERC
- U.S. Department of State for an International Fulbright Science & Technology Award
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- neutron scattering at the Lujan Center - DOE Office of Basic Energy Sciences
Eu2+ inserted in beta-Si3-xAlxOxN4-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-3 X-ray absorption measurements, yield a consistent picture of the composition, and the favorable position for Eu2+ substitution in the crystal structure. The Debye temperature Theta(D), which is a proxy for structural rigidity relating to effectiveness as a phosphor, is very high for the starting beta-Si3N4 framework and is determined to decrease only slightly for the small amounts of Al3+ and O2- co-substitution that are required for charge balance associated with Eu2+ insertion. (C) 2014 AIP Publishing LLC.
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