Luminescent properties of Ce3+, Er3+ co-doped La3Si6N11

In order to obtain near-infrared phosphor pumped by blue chip with high luminous efficiency, a novel near-infrared phosphor Ce3+/Er3+ doped La3Si6N11 was designed and firstly prepared via conventional solid-state reactions. The structure and morphology of Ce3+/Er3+ doped La3Si6N11 were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Compared with Er3+ doped La3Si6N11, the emission intensity of the Ce3+, Er3+ co-doped phosphor can be increased more than 5 times. Meanwhile, the mechanism of energy transfer from Ce3+ to Er3+ is confirmed according to the excitation, emission spectra and decay lifetimes curve. Above results suggest that La3Si6N11:Ce3+,Er3+ is a promising near-infrared phosphor for blue pumped LEDs (light-emitting diodes).