CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Luminescence and Energy Transfer in Europium and Bismuth Codoped Trisodium Yttrium Silicates |
XIE Guo-Bo** |
Faculty of Computer, Guangdong University of Technology, Guangzhou 510006
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Cite this article: |
XIE Guo-Bo 2013 Chin. Phys. Lett. 30 087802 |
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Abstract Bi3+ and Eu3+ doped Na3YSi2O7 phosphors are prepared with solid state reactions. The luminescence properties of Bi3+ and Eu3+ in Na3YSi2O7 and the energy transfer (ET) from Bi3+ to Eu3+ are investigated in detail. The ET mechanism is also discussed. Bi3+ in Na3YSi2O7 emits near-ultraviolet (UV) light in a broad band peaking at 394 nm which can be attributed to the transition from excited states 3P0, 1 to ground state 1S0 under the excitation of UV light with a wavelength of 309 nm. Eu3+ in Na3YSi2O7 emits orange and red light. The co-doping of Bi3+ into Eu3+ doped Na3YSi2O7 introduces an intense absorption band from 270 to 350 nm due to ET from Bi3+ to Eu3+. The sensitization effect of Bi3+ on Eu3+ makes it possible that Bi3+ and Eu3+ co-doped Na3YSi2O7 could be used in AlGaN-based UV light emitting diodes as a red phosphor.
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Received: 26 March 2013
Published: 21 November 2013
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