A NEW SINGLE-COMPONENT CA20AL26MG3SI3O68:DY3+, EU3+ POTENTIAL PHOSPHOR FOR WHITE-LIGHT EMITTING DIODES: LUMINESCENCE PROPERTIES, ENERGY TRANSFER AND MULTICOLOR LUMINESCENCE
Journal Title: Topics in Chemical & Material Engineering (TCME) - Year 2018, Vol 1, Issue 1
Abstract
In this study, novel single-component Ca20Al26Mg3Si3O68:Dy3+, Eu3+ phosphor has been successfully prepared by high temperature solid state reaction. The crystal structure, luminescent property, energy transfer and multicolor emission behavior were investigated in detail. The structure was characterized by X-ray diffraction (XRD) and the results indicate that the as-prepared samples are of pure orthorhombic phase of Ca20Al26Mg3Si3O68 and Dy3+ and Eu3+ are totally incorporated into the host lattice of Ca20Al26Mg3Si3O68. The Dy3+ or Eu3+ single doped samples exhibit strong yellow and red emissions, originating from the 4F9/2→6H13/2 transition of Dy3+ and the 5D0→7FJ (J=0, 1, 2, 3) transitions of Eu3+ and the optimal concentration of Dy3+ and Eu3+ ions in Ca20Al26Mg3Si3O68 were determined to be 5 mol% and 11 mol%, respectively. Meanwhile, the energy migration from Dy3+ to Eu3+ in co-doping samples has been confirmed by the excitation and emission spectra and the process was reported in detail. Based on the energy transfer, under the excitation of 344 nm, the emitting color can change from yellow to orange red by adjusting the relative doping concentration of Dy3+ and Eu3+ ions, indicating that the phosphors Ca20Al26Mg3Si3O68:Dy3+, Eu3+ with tunable multicolor emissions may have potential application in pc-white LEDs
Authors and Affiliations
Bo Yuan, Yanhua Song, Weidong Wang, Haifeng Zou, Li Kong, Chuanbo Dai
Keywords
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- EP ID EP413419
- DOI 10.26480/icnmim.01.2018.16.20
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