纳米荧光粉Eu0．12Y1．88-xMgxO3-δ的光致发光特性

Photoluminescent properties of nanosized phosphors Eu_(0.12)Y_(1.88-x)Mg_xO_(3-δ)

使用超声波作用下的均匀沉淀法，制备了掺杂Mg^2＋的纳米荧光粉Y2O3：Eu^3＋．考察了不同Mg^2＋掺杂含量下Eu0．12Y1．88-xMgxO3-δ（x=0～0．18，δ代表氧空位）的晶格常数变化，研究了掺杂含量对样品发射光谱及激发光谱的影响．结果表明，Eu0．12Y1．88-xMgxO3-δ的晶格常数在1．0604～1．0623nm之间，晶粒尺寸在25．9—40．7nm之间．掺杂Mg^2＋后，当x=0．14时，样品Eu0．12Y1．88-xMgxO3-δ的激发光谱中电荷迁移带（CTS）最大峰强度最高且色纯度最好．

Mg^2＋ - doped Y2O3 ：Eu^3＋ nanosized phosphor was prepared using ultrasonic and homogeneous precipitation method. The lattice constant of Eu0.12Y1.88-xMgxO3-δ （x = 0- 0.18） with different Mg^2＋ doped content was investigated. The effects of Mg^2＋ - doped content on luminescent properties were studied and compared each other. The results show that the lattice constant of the Mg^2＋ - doped sample is from 1.060 4 to 1.062 3 nm and the grain size is between 25.9 and 40.7 nm. The luminescent property and color purity of Eu0.12Y1.88-xMgxO3-δ is better than the others when the Mg^2＋ - doped content is 0.14.