Luminescence and Energy-Transfer Mechanism in SrSi2O2N2:Ce3+,Eu2+ Phosphors for White LEDs
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Song, X. F.
Fu, R. L.
Agathopoulos, S.
He, H.
Zhao, X. R.
Li, R.
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Electrochemical Society
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peer reviewed
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Journal of the Electrochemical Society
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A series of Ce3+ and Eu2+ co-doped SrSi2O2N2 phosphors, whose features qualify them for consideration in white-light UV or blue light-emitting diodes (LEDs), was synthesized via a high temperature solid-state reaction under a reductive atmosphere. The dependence of luminescence properties of the produced powders on the concentration of an activator (Eu2+) and a coactivator (Ce3+) was investigated. The experimentally recorded luminescence spectra and the calculations of the efficiency of energy transfer from Ce3+ to Eu2+ and the critical distance between Ce3+ and Eu2+ suggest a resonance-type energy-transfer mechanism from Ce3+ to Eu2+ due to dipole-dipole interactions.
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cerium, doping profiles, europium, high-temperature effects, light emitting diodes, phosphors, powders, strontium compounds, emitting phosphors, photoluminescence, nitride, eu2+, sr, ba, oxynitride, emission, color
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<Go to ISI>://000273222700085
http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JESOAN000157000002000J34000001&idtype=cvips&gifs=yes&ref=no
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en
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Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών