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- W2074072799 abstract "Abstract A novel green-emitting phosphor Eu 2+ -doped Ca 15 (PO 4 ) 2 (SiO 4 ) 6 with a structure derivative of α′-Ca 2 SiO 4 is synthesized by a conventional solid-state reaction method. The photoluminescence properties, the concentration quenching of Eu 2+ ion, and the thermal stability are investigated. The Ca 15 (PO 4 ) 2 (SiO 4 ) 6 :Eu 2+ phosphor is excited efficiently at a wavelength of 330 nm. At the optimum doping concentration of 0.5 mol% Eu 2+ ion, the Ca 15 (PO 4 ) 2 (SiO 4 ) 6 :Eu 2+ phosphor has the strongest emission intensity at 491 nm. The main mechanism of concentration quenching is found to be the rapid migration of excitation between the excited Eu 2+ ions by exchange coupling. The thermal activation energy barrier is confirmed as 0.244 eV. Furthermore, the performance of this phosphor is tested by the fabrication of a phosphor-converted LED (pc-LED) through the integration of an InGaN-based near-ultraviolet light-emitting diode (LED) and driving under from 50 mA to 300 mA. The pc-LED reveals high color rendering index (CRI) value over 50, which is good for applications in w-LED." @default.
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- W2074072799 date "2013-05-01" @default.
- W2074072799 modified "2023-09-26" @default.
- W2074072799 title "A novel green-emitting Ca15(PO4)2(SiO4)6:Eu2+ phosphor for applications in n-UV based w-LEDs" @default.
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- W2074072799 doi "https://doi.org/10.1016/j.matchemphys.2013.02.009" @default.
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