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通过固相反应法在1000℃空气气氛中合成了In2(MoO4)3:Eu3+、Bi 3+红色荧光粉。粉体分别用X射线衍射(XRD)、荧光分度计测试。结果表明制备的荧光粉具有单相立方晶体结构,该荧光粉能够被近紫外光(395nm)有效激发,发射高强度的612nm红光。Eu3+浓度为40%(摩尔分数)时,In2(MoO4)3:Eu3+发光强度较高。In2(MoO4)3:0.4Eu3+、Bi 3+荧光粉,Bi 3+浓度为3%(摩尔分数)时,发光强度最大,高于没有掺Bi 3+的In2(MoO4)3:0.4Eu3+荧光粉。和CaMoO4:Eu3+相比,In2(MoO4)3:0.4Eu3+、0.03Bi 3+有较高的发光强度。因此,In2(MoO4)3:0.4Eu3+、0.03Bi 3+是一种可能应用于近紫外白光LED的新型红色荧光粉。

Red-emitting phosphor In2(MoO4)3∶Eu3+,Bi3+ has been synthesized by solid-state reaction at 900℃ in air.X-ray diffraction(XRD) and fluorescence spectrometer were used to characterize the samples.The prepared In2(MoO4)3∶Eu3+,Bi3+ has a cubic structure with pure phase.Photoluminescence spectra indicate that the phosphor can be effectively excited under the excitation of near-UV light(395nm) and emit intensive red light at 612nm.The phosphor In2(MoO4)3∶0.4Eu3+ has strong luminescence intensity among Eu3+-doped In2(MoO4)3 phosphors.The photoluminescent intensity reaches the maximum when Bi3+ concentration is 3mol% in the In2(MoO4)3∶0.4Eu3+,Bi3+ and is stronger than that of no Bi3+ phosphor In2(MoO4)3∶0.4Eu3+.Compared with CaMoO4∶Eu3+,In2(MoO4)3∶0.4Eu3+,0.03Bi3+ has stronger luminescence intensity.Therefore the In2(MoO4)3∶0.4Eu3+,0.03Bi3+ may be a novel red phosphor for near-UV white LED.

参考文献

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