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中文摘要：
本文研究了M2SiO4∶Dy3+(M=Ca,Sr,Ba)样品的结构和发光特性。结果表明:Ca2SiO4属单斜晶系,Sr2SiO4和Ba2SiO4属正交晶系,且晶体结构随着Dy3+的掺入并不发生改变。M2SiO4∶Dy3+在325 nm、350 nm、365 nm和386nm附近有比较强烈的吸收峰,分别对应Dy3+的6H15/2→6P3/2,6H15/2→6P7/2,6H15/2→6P5/2,6H15/2→4M21/2的跃迁。在386 nm光激发下,样品在480 nm、492 nm及574 nm处有较强的发射峰。改变样品中碱土金属阳离子的种类和含量,M2SiO4∶Dy3+黄光发射带和蓝光发射带的相对强度发生了较大的变化。
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