Journal
CHEMICAL PHYSICS LETTERS
Volume 492, Issue 1-3, Pages 40-43Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2010.04.023
Keywords
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Funding
- National Natural Science Foundation of China [50672019, 10804024]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Fundamental Research Funds for the Central Universities [HIT.NSRIF. 2009056]
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The influence of site occupancy of Li+, including substitutional and interstitial sites, on the upconversion emissions of Er3+ doped Y3Al5O12 powders is reported. The intensity of green emission increases slightly when the Li+ occupies substitutional site, but when the Li+ enters into interstitial site it enhances drastically accompanied with a change of emission spectra. These phenomena originate from the increase, induced by interstitial Li+, in the lifetime of I-4(11/2) level, the ratio of radiation rate in green emission and the absorptivity at 980 nm. (C) 2010 Elsevier B.V. All rights reserved.
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