Preparation, characterization and luminescence of Sm3+ or Eu3+ doped Sr2CeO4 by a modified sol-gel method

• Published in: Journal of rare earths Vol. 28; no. 4; pp. 513 - 518
• Main Authors: ZHANG, Chunxiang, SHI, Jianshe, YANG, Xujie, LU, Lude, WANG, Xin
• Format: Journal Article
• Language: English
• Published: Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China 01.08.2010
• Subjects: sol-gel chemistry; Sr2CeO4:RE3; luminescence; inorganic compounds; rare earths
• ISSN: 1002-0721
• DOI: 10.1016/S1002-0721(09)60143-5

O6; Superfine Sr2CeO4:RE3+ (RE=Eu, Sm) phosphors were synthesized at relatively low temperature by a modified sol-gel method us-ing nitrates as raw materials, ethylenediaminetetraacetic acid (EDTA) as complexing agent. Single phase phosphors could be obtained at cal-cination temperature above 800 ℃ and pH value higher than 6.4 of initial solution. The as-prepared powders consisted of uniform crotch-like grains. The preparation process was monitored by thermogravimetric and differential thermal analysis (TG-DTA) and Raman spectra. The obtained products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS) and photohiminescence. Photoluminescence study indicated that strong energy transfer occurred between Eu3+/Sm3+ and host. The Sr2CeO4:RE3+ emission could be tuned from blue to white and red light by varying the concentration of RE3+. The strong emission and controllable light color are suitable for applications in advanced lighting and displaying fields.