作　　者： ; ;

机构地区： 洛阳理工学院材料科学与工程系

出　　处： 《稀土》 2015年第3期84-89,共6页

摘　　要： 为了弥补目前白光LED显色指数的不足,用传统熔融法制备了Eu3+/Tb3+掺杂的硼硅酸盐玻璃,研究了Eu3+/Tb3+掺杂的硼硅酸盐玻璃在391 nm和462 nm激发下的下转换发光性能和能量传递特征。结果表明,用462 nm激发Eu3+掺杂的硼硅酸盐玻璃样品,发现随着Eu3+浓度的增加,Eu2O3含量为0.5%(摩尔分数)时达到发射强度最大值。对于Eu3+/Tb3+共掺的硼硅酸盐玻璃,在462 nm处呈现最强激发峰,其最强发射峰为612 nm的红光。而且随着Tb3+浓度的增加,Eu3+和Tb3+之间的能量传递加强,大大提高了612 nm红光的发射强度。 Eu3 +/ Tb3 +-doped borosilicate glasses were prepared by using a conventional melting-quenching method and their spectroscopic properties and energy transfer under the excitation of 391 nm and 462 nm were investigated in order to compensate for the shortage of current white LED color rendering index.The results show that the maximum of excited peak is obtained at 462 nm for Eu3 +/ Tb3 +-doped samples.Effects of Eu2O3 content on spectroscopic properties are investigated in detail.It is noted that the maximum of luminescent intensity is achieved with 0.5mol% of Eu2O3,and the strongest emission peak is at 612 nm.Under 462 nm excitation,red(612 nm) light of Eu3 +/ Tb3 +-codoped samples is enhanced due to the efficient energy transfer from Tb3 +to Eu3 +,which indicates that the Eu3 +/ Tb3 +-doped borosilicate glass is a promising candidate for white light emitting diode.

关 键 词： 硼硅酸盐玻璃 稀土离子 光谱发光 能量传递

领　　域： [化学工程] [化学工程]