低温燃烧法合成γ-LiAlO_2：Eu^(3＋)红色荧光粉及其发光性能

Synthesis of γ-LiAlO_2:Eu^(3+) red phosphor by low-temperature combustion and its luminescence characterization

低温燃烧法合成了γ-LiAlO2:Eu3+红色荧光粉,采用XRD、SEM、PL对样品进行了结构、形貌及发光性能表征。结果表明样品为四方晶系结构,在395nm的紫外光激发下,样品发射峰位于578、588、613、651和700nm,对应Eu3+离子的5 D0→7FJ=0,1,2,3,4的能级跃迁,主峰位于613nm处。其发光强度与Eu3+和H3BO3的掺量密切相关。

The red phosphor of γ-LiAlO2：Eu^3＋ were synthesized by low-temperature combustion method. The char acteristics of samples were investigated by means of X-ray diffraction（XRD）, scanning electron microscopy （SEM） and photoluminescence（PL）. The results showed that phosphor was pure-phase of tetragonal crystal system. Excited by 238nm UV light, the emission peaks located at 578,588,613,651 and 700nm corresponded to the 5D0→7FJ = 0,1,2,3,4 typical transitions of Eu3＋ , respectively. The main peak was at 613nm. luminous intensity of γ-LiAlO2：Eu^3＋ was the largest at 613nm. The photoluminescence intensity of samples was interrelated with concentration of Eu3＋ ion and Ha BOa.