کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5401478 | 1392713 | 2011 | 6 صفحه PDF | دانلود رایگان |
Low temperature quenching and high efficiency CaSc2O4:Ce3+ (CSO:Ce3+) phosphors co-doped with Tm3+, La3+ and Tb3+ ions were prepared by a solid state method and the phase-forming, morphology, luminescence and application properties of these phosphors were investigated. The results showed that co-doping of Tm3+, La3+ and Tb3+ ions can improve the luminescence properties and decrease temperature quenching of CSO:Ce3+ phosphor remarkably. High efficiency green-light-emitting diodes were fabricated with the prepared phosphors and InGaN blue-emitting (â¼460Â nm) chips. The good performances of the green-light-emitting LEDs made from co-doped CSO:Ce3+ phosphors confirm the luminescence enhancement and indicate that Tm3+, La3+ and Tb3+ co-doped CSO:Ce3+ phosphors are suitable candidates for the fabrication of high efficiency white LEDs.
⺠Tm3+, La3+, Tb3+-co-doped Ca2Sc2O4:Ce3+ phosphors were prepared by a solid state method. ⺠Co-doping of Tm3+, La3+ and Tb3+ can decrease the temperature quenching of the Ca2Sc2O4:Ce3+ phosphor remarkably. ⺠Fabrication of green LEDs, indicating that Tm3+, La3+ and Tb3+-co-doped Ca2Sc2O4:Ce3+ phosphors are suitable candidates for white LEDs.
Journal: Journal of Luminescence - Volume 131, Issue 8, August 2011, Pages 1770-1775