Er^(3+)和Yb^(3+)共掺杂ZnS纳米晶的合成及荧光性能（英文）

Synthesis and Photoluminescence of Er^(3+) and Yb^(3+) Doped ZnS Nanocrystals

以巯基乙酸为稳定剂,采用水热法合成了Zn S:Er/Yb纳米晶。利用XRD、TEM、XPS和荧光光谱对合成的纳米晶进行物相、形貌、化学价态及荧光性能进行表征。结果表明:合成的纳米晶晶粒度约5 nm,为闪锌矿结构;由荧光光谱分析可知,激发波长为270nm时,发射光谱中主要出现了470,530和580 nm 3个发射峰,且当合成温度为120℃时,发光峰强度最大。980 nm激发纳米晶时,得到了Er离子在540和650 nm处,~4F_(3/2)→~4I_(15/2)和~4F_(9/2)→~4I_(15/2)的跃迁发射峰。

ZnS ：Er/Yb nanocrystals were synthesized by a hydrothermal method using thioglycolic acid as a stabilizer. The crystalline phases, morphology, chemical bond states and photoluminescent properties of the nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoemission spectroscopy and fluorescence photometer. The results show that most prepared nanoparticles are spherical in shape with an average size of 5 nm, and have cubic zinc blende crystal structure. The emission spectrum of ZnS ：Er/Yb nanocrystals excited at 270 nm displays three main peaks at 470, 530 and 580 nm, and the intensity of fluorescence peaks is the strongest for nanocrystals prepared at 120 ℃. When ZnS ： Er/Yb nanocrystals are excited at 980 nm, the emission peaks around 540 and 650 nm appear, associated with the 4F3/2→4I15/2and4F（9/2→4I15/2 of Er3＋ ions transitions, respectively.