Department of Physics
Low temperature quenching and high efficiency Tm3+, La3+ or Tb3+ co-doped CaSc2O4:Ce3+ phosphors for light-emitting diodes
Low temperature quenching and high efficiency CaSc2O 4: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 (∼460 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 Tb 3+ co-doped CSO:Ce3+ phosphors are suitable candidates for the fabrication of high efficiency white LEDs. © 2011 Elsevier B.V.
CaSc2O4:Ce3+, Co-doping, LED, Phosphor
Source Publication Title
Journal of Luminescence
Chen, Yibo, Kok Wai Cheah, and Menglian Gong. "Low temperature quenching and high efficiency Tm3+, La3+ or Tb3+ co-doped CaSc2O4:Ce3+ phosphors for light-emitting diodes." Journal of Luminescence 131.8 (2011): 1770-1775.