摘要
The spheric La2O3∶Eu nanocrystals were prepared using NH3·H2O-NH4HCO3 mixture as precipitant. The material was characterized by FTIR, XRD and TEM techniques. The luminescence properties of Eu3+ in spheric La2O3 were measured by three dimension spectra, emission and excitation spectra. The results indicate that the La2O3∶Eu nanocrystals are in hexagonal phase by annealing at 800 ℃, the crystal size is about 30 nm. The maximum emission and excitation wavelength were determined by three dimensional spectroscopy to be at 591 nm and 394 nm, respectively. In emission spectrum the band at 591 nm and 612 nm are corresponding to 5D0-7F1 and 5D0-7F2 transition of Eu3+ ions. With increasing in annealing temperature the differences of intensity of the two transitions are increased. This phenomenon shows that the luminescence intensity of La2O3∶Eu nanocrystals can be tuned by changing annealing temperature.
The spheric La2O3∶Eu nanocrystals were prepared using NH3·H2O-NH4HCO3 mixture as precipitant. The material was characterized by FTIR, XRD and TEM techniques. The luminescence properties of Eu^3＋ in spheric La2O3 were measured by three dimension spectra, emission and excitation spectra. The results indicate that the La2O3∶Eu nanocrystals are in hexagonal phase by annealing at 800 ℃, the crystal size is about 30 nm. The maximum emission and excitation wavelength were determined by three dimensional spectroscopy to be at 591 nm and 394 nm, respectively. In emission spectrum the band at 591 nm and 612 nm are corresponding to ^5D0-^7F1 and ^5D0-^7F2 transition of Eu^3＋ ions. With increasing in annealing temperature the differences of intensity of the two transitions are increased. This phenomenon shows that the luminescence intensity of La2O3∶Eu nanocrystals can be tuned by changing annealing temperature.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2008年第6期981-985,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.20161001)
内蒙古自治区自然科学基金(No.200711020213)资助项目
作者简介
通讯联系人。E—mail：sr@imnu．edu．cn；sarenqindamuni@sohu．com；莎仁，女（蒙古族），44岁，副教授；研究方向：稀土发光材料。
