Citrate–gel synthesis and luminescent properties of ZnGa2O4 doped with Mn2+ and Eu3+
Citrate–gel synthesis and luminescent properties of ZnGa2O4 doped with Mn2+ and Eu3+
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DOI：
10.1016/s0167-577x(02)00664-x
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发表时间：
2002-11
影响因子：
3
通讯作者：
Minghui Yu;J. Lin;Y. H. Zhou;Sumin Wang
中科院分区：
文献类型：
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作者：
Minghui Yu;J. Lin;Y. H. Zhou;Sumin Wang
以无机盐为原料，柠檬酸为络合剂，采用柠檬酸-凝胶法制备了尖晶石型氧化锌和掺杂Mn2+、Eu3+的ZnGa2O4荧光粉。用X-射线衍射仪、TG-DTA、FT-IR和发光激发发射光谱对产物进行了表征。X-射线衍射仪测试结果表明，粉末在500℃开始晶化，700℃时得到纯净的ZnGa2O4相，这与TG-DTA和FT-IR的结果一致。在晶体ZnGa2O4中，当猝灭浓度为5mol%(Ga3+)时，Eu3+出现特征红光(615 nm，5D0-7F2)；当猝灭浓度为0.1mol%(Zn2+)时，Mn2+出现绿光发射(505 nm，4T1-6A1)。研究了ZnGa2O4：Mn2+/Eu3+的发光机理。
By using inorganic salts as raw materials and citric acid as complexing agent, spinel oxide ZnGa2O4and Mn2+, Eu3+-doped ZnGa2O4phosphor powders were prepared by a citrate–gel process. X-ray diffraction (XRD), TG–DTA, FT-IR and luminescence excitation and emission spectra were used to characterize the resulting products. The results of XRD reveal that the powders begin to crystallize at 500 °C and pure ZnGa2O4phase is obtained at 700 °C, which agrees well with the results of TG–DTA and FT-IR. In the crystalline ZnGa2O4, the Eu3+shows its characteristic red (615 nm,5D0–7F2) emission with a quenching concentration of 5 mol% (of Ga3+), and the Mn2+shows green emission (505 nm,4T1–6A1) with a quenching concentration of 0.1 mol% (of Zn2+). The luminescence mechanism of ZnGa2O4:Mn2+/Eu3+is presented.