Eu^(3+)掺杂TiO_2纳米晶的制备及光学性质研究

Preparation and Luminescence Properties of Eu^(3+) Doped TiO_2 Nanocrystalline

采用溶胶-凝胶的方法,通过烷基钛的水解、煅烧,制备了掺杂Eu3+的TiO2纳米晶发光材料.结果表明,稀土掺杂的TiO2纳米晶不仅没有改变在不同温度下TiO2的晶型,而且Eu3+离子发光与TiO2的晶型有密切关系,即Eu3+掺杂在具有锐钛矿晶型的TiO2,在波长为396、464和532 nm光的激发下该材料才能发射单色性较强的红色荧光,并讨论了不同烧结温度对材料发光性能的影响.

By employing sol-gel process and hydrolyzing Ti（OC4 H9）4 in alcohol solution followed by calcinations in different temperature, Eu^3＋ doped TiO2 nanocrystalline is synthesized. The resuits indicate that Eu^3＋ doped TiO2 crystalline can not change TiO2 crystalline, and emitting fluorescence relies on TiO2 crystalline. Only anatase crystalline can emit powerful red fluorescence under the excitation with 396 , 464 and 532 nm of wavelengths. The effect of spectrum relying on temperature is also discussed.