稀土纳米发光材料研究进展

Progress on the Study of Nanoscale Rare Earth Luminescent Materials

稀土纳米发光材料明显不同于体相发光材料的特性已经成为近年来的热点研究课题,为了更好地探索其特性,综述了稀土纳米发光材料的研究进展,特别是掺杂Eu3+和Tb3+离子的稀土纳米发光材料。首先,归纳总结了稀土纳米发光粒子不同于体相材料的光谱特性,如电荷迁移带的红移、发射峰谱线的宽化、猝灭浓度的升高、荧光寿命和量子效率的改变等等;其次,概述了一维稀土纳米发光材料的制备与光谱性质,介绍了二维稀土纳米发光薄膜的图案化和介孔模板组装;最后,对其未来的发展趋势进行了展望。

Compared with their corresponding bulk phases,nanoscale rare earth luminescent materials have come forth a lot of new luminescent phenomena such as the red shift of CTS, the broadening of emission peaks, the increase of quenching concentration, the changes of fluorescent lifetimes and quantum efficiency. Investigating and understanding these materials is not only of academic interest but also of technological importance for advanced phosphor applications. Therefore, in this article, progress on the study of nanoscale rare earth luminescent materials has been reviewed. Firstly, summing up the luminescent characteristic of nanoscale rare earth luminescent particles different from those of bulk materials; secondly, summarizing the preparation and spectrum properties of 1D nanoscale rare earth luminescence materials; thirdly, introducing the patterning of luminescent thin films and assemblies in the mesopore template of 2D nanoscale rare earth luminescence materials; finally, the future development trend for the nanoscale luminescent materials is fore-(casted.) That is to say, in preparation, both nanoscale rare earth luminescent materials with good crystal shape, high brightness, nonaggregating, and narrow particle size distributing and ordered array luminescent devices composed of nanowires, nanotubes, nanorods and so on need to be developed. In fundamental studies, more efforts need to be done on the spectra properties rooted in their surface and interface effects. In applications, the key problems of low luminescent brightness and low stabilities must be resolved.