Abstract

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.

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