Chemical Physics Letters, Vol.685, 89-94, 2017
Synthesis and luminescent properties of Eu3+, Eu3+/Bi3+ and Gd3+ codoped YAG:Ce3+ phosphors and their potential applications in warm white light-emitting diodes
A series of YAG: Ce3+/Eu3+, YAG:Ce3+/Eu3+/Bi3+ and YAG:Ce3+/Gd3+ phosphors were synthesized by a co-precipitation method. The results suggest that all of phosphors have the cubic phase and nearly spherical morphology. However, the red emission can be produced by codoping Eu3+ and Eu3+/Bi3+ ions in YAG: Ce3+, and the codoped Gd3+ ions can induce the red-shift of Ce3+ emission. These results suggest that the Eu3+, Eu3+/Bi3+ and Gd3+ ions can be used to decrease the correlated color temperature and increase the color-rendering index of white light-emitting diodes based on InGaN blue chip and YAG:Ce3+ phosphors. (c) 2017 Elsevier B.V. All rights reserved.