CAJ | 학술논문

以CTAB为表面活性剂,采用水热法合成了Yb,Er共掺MWO_4(M=Cd,Ba)纳米晶体.采用X射线衍射仪(XRD)、扫描电镜(SEM)、能谱(EDS)和荧光分光光度计等手段对产物的组成、形貌和荧光性质进行了系统表征.结果表明:Yb~(3+),Er~(3+)掺杂钨酸盐的发光条件随着M种类的不同而有较大的差异,水热合成的CdWO_4:Yb~(3+),Er~(3+)纳米晶体在980 nm激光照射下用肉眼可观察到明显的绿色上转换发光,而BaWO_4:Yb~(3+),Er~(3+)晶体高温煅烧到900℃才能观察到明亮的绿色发光.研究了温度对上转换发光强度的影响,讨论了两种晶体的上转换发光性质.
이CTAB위표면활성제,채용수열법합성료Yb,Er공참MWO_4(M=Cd,Ba)납미정체.채용X사선연사의(XRD)、소묘전경(SEM)、능보(EDS)화형광분광광도계등수단대산물적조성、형모화형광성질진행료계통표정.결과표명:Yb~(3+),Er~(3+)참잡오산염적발광조건수착M충류적불동이유교대적차이,수열합성적CdWO_4:Yb~(3+),Er~(3+)납미정체재980 nm격광조사하용육안가관찰도명현적록색상전환발광,이BaWO_4:Yb~(3+),Er~(3+)정체고온단소도900℃재능관찰도명량적록색발광.연구료온도대상전환발광강도적영향,토론료량충정체적상전환발광성질.
Yb~(3+), Er~(3+) co-doped MWO_4 (M = Cd, Ba) nanocrystals were prepared via a hydrothermal method, and the composition, morphology and fluorescence property of the products were characterized by x-ray diffraction(XRD), scan electron microscope(SEM), energy-dispersive x-ray spectroscope(EDS) and fluorescence spectrophotometer. The results show that the luminescence condition of Yb~(3+) , Er~(3+) co-doped tungstate is dependent on the type of M. CdWO_4 :Yb~(3+), Er~(3+) nanocrystals synthesized by the hydrothermal method can emit green up-conversion fluorescence when they are excited by 980 nm infrared light. However, BaWO_4: Yb~(3+) , Er~(3+) can emit the intense green up-conversion fluorescences when they are annealed at 900 ℃. The effect of temperature on the up-conversion fluorescent intensity was also studied, and the properties of the up-conversion luminescence were discussed.