稀土纳米晶的上转换发光调控研究进展  

Research Progress on Upconversion Emission Modulation of Rare Earth Nanocrystals

作　　者：张格 杨向飞 王晓勇 董浩 孙聆东[1] 严纯华[1,2] ZHANG Ge;YANG Xiangfei;WANG Xiaoyong;DONG Hao;SUN Lingdong;YAN Chunhua(Beijing National Laboratory for Molecular Sciences,State Key Laboratory of Rare Earth Materials Chemistry and Applications,PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China;College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]北京大学化学与分子工程学院,稀土材料化学及应用国家重点实验室,北京大学-香港大学稀土材料与生物无机化学联合实验室,北京分子科学中心,北京100871 [2]兰州大学化学化工学院,甘肃兰州730000

出　　处：《发光学报》2023年第7期1149-1166,共18页Chinese Journal of Luminescence

基　　金：国家自然科学基金(22031002,21931001,21927901,22205009)。

摘　　要：近年来,将近红外光转换为短波长的可见或近红外光的稀土纳米晶上转换发光研究吸引了生物成像、纳米温度传感、太阳能电池等领域研究者的广泛关注。面向多领域的应用需求,稀土纳米晶上转换发光需提高其发光强度、发光波长以及激发波长的选择性。本文综述了纳米尺度上,通过组成、结构以及核壳结构的设计,在理解上转换发光过程的能量传递路径和上转换发光过程的基础上,提高对上转换发光的颜色、各跃迁的比例以及发光强度、发光寿命等调控的研究进展。此外,还关注了纳米晶与贵金属表面电场、表面有机分子以及环境温度的耦合在提高辐射跃迁几率、减少无辐射能量损失等方面提高其上转换发光强度的研究发展趋势。In recent years,upconversion emission of rare earth nanocrystals,which can convert near-infrared light to short-wavelength visible or near-infrared one,has attracted extensive attention from researchers in the fields of bio⁃logical imaging,nanothermometer,solar cells,and so on.For multi-field applications,upconversion emission of rare earth nanocrystals needs to improve the luminescent intensity,luminescent wavelength selectivity,and excita⁃tion wavelength.In this paper,we briefly review the research progress in improving the color,luminescence intensi⁃ty,and luminescence lifetime of upconversion emission on the basis of understanding the energy transfer pathway and upconversion emission process through the design of composition,structure and core-shell structure at the nanoscale.In addition,the coupling between nanocrystals and precious metal surface electromagnetic fields,surface organic molecules and ambient temperature is also concerned.The research trend of increasing the intensity of rare earth up⁃conversion luminescence in terms of increasing radiation transition probability and reducing non-radiation quenching is also mentioned.

关 键 词：稀土纳米晶 上转换发光 核壳结构 

分 类 号：O482.31[理学—固体物理]