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

Yuan Xue^1,2，Ronghui Liu^1,2，Yuanhong Liu^1,2，Huibing Xu^1,2，Guantong Chen^1,2，Xia Zhang^1,2，Wei Gao^1,2，Ze Jiang^1,2

1. National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals2. Grirem Advanced Materials Co., Ltd.

摘 要：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 La₃ Si₆ N₁₁:Ce³⁺,Er³⁺ is a promising near-infrared phosphor for blue pumped LEDs（light-emitting diodes）.

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