广东工业大学学报 ›› 2020, Vol. 37 ›› Issue (01): 34-41.doi: 10.12052/gdutxb.190024
梁柏鑫, 易双萍, 胡耕樵, 方志雄, 赵韦人
Liang Bo-xin, Yi Shuang-ping, Hu Geng-qiao, Fang Zhi-xiong, Zhao Wei-ren
摘要: 采用传统的高温固相法合成了Dy3+/Eu3+单掺杂和Dy3+,Eu3+共掺的具有可调色度ZnNb2O6荧光粉。利用X射线衍射、激发和发射光谱、荧光寿命以及扫描电镜(SEM)等系统地分析了上述合成样品。ZnNb2O6在200~500 nm有着较宽的吸收带,呈现出具有自激活发光的特性。ZnNb2O6:0.08Dy3+和ZnNb2O6:0.08Dy3+,0.03Eu3+荧光粉的色度坐标接近标准白光(0.33,0.33)。通过Dy3+作为敏化剂,Eu3+作为红光发光来调节样品的发光颜色;通过荧光光谱以及荧光寿命衰减曲线确定Dy3+至Eu3+离子的能量传递机制。分析得出Dy3+离子到Eu3+离子的能量传递机制遵循非辐射电偶极矩-电四极矩作用。据此,本文制备的ZnNb2O6:0.08Dy3+,yEu3+荧光粉在紫外汞灯白光源和其他固态照明技术中具有一定的应用价值。
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