화학공학소재연구정보센터
Materials Research Bulletin, Vol.73, 351-356, 2016
Energy transfer and tunable luminescence of Na-2(Y,Eu)Mg2V3O12 phosphors for white LED applications
A series of solid-solution phosphors Na-2(Y,Eu)Mg2V3O12 were prepared using solution combustion reaction. X-ray diffraction studies verified the formation of single phase Na-2(Y,Eu)Mg2V3O12 with garnet structure. Na-2(Y,Eu)Mg2V3O12 phosphors show not only a broad emission band with a maximum at 510 nm due to the [VO4](3-) group but also several sharp emission lines due to the Eu3+ ions. The energy transfer from [VO4](3-) to Eu3+ was discussed on the base of the spectral analysis. The color-tunable emissions of the Na-2(Y,Eu)Mg2V3O12 phosphor as a function of Y/Eu ratio are realized by continuously generating the varied hues from yellowish-green to reddish-orange. This indicates that the obtained phosphor may have potential applications in the field of UV-based white LEDs. (C) 2015 Elsevier Ltd. All rights reserved.