Abstract:The ZnO∶Eu3+ crystal was prepared via coprecipitation with the starting materials Zn(OOCCH3)2·2H2O, Eu2O3 and NaOH. The X-ray diffraction patterns show that the samples are hexagonal wurtzite structure, No diffraction peaks from europium oxides are detectable. Comparing the ZnO and ZnO∶Eu3+ Raman spectra, the new local vibrational modes were observed in ZnO∶Eu3+. These phenomena show that Eu3+ ions have entered the lattice by doping. The SEM analysis exhibits that ZnO nanoparticles prepared by coprecipitation become smaller with Eu3+ doping. The excitation and emission spectra of ZnO∶Eu3+ sample present a efficient energy transfer process between ZnO and Eu3+ ions.
[1] Marathe S K, Koinkar P M, Ashtaputre S S, et al. Nanotechnology, 2006, 17: 1932. [2] Bhargava R N. Journal of Luminescence. 1997, (72-74): 46. [3] Krishna Kanta Haldar, Amitava Patra. Applied Physics Letters, 2009, 95: 063103. [4] Pan C J, Chen C W, Chen J Y, et al. Applied Surface Science, 2009, 256: 187. [5] Trinh Thi Hang, Trinh Xuan Anh, Pham Thanh Huy. Journal of Physics: Conference Series, 2009, 187: 012022. [6] Blanca-Romero A, Flores-Riveros A, Rivas-Silva J F. Journal of Nano Research, 2010, 9:25. [7] Van Dijken A, Meulemkamp E A, Vanmaekelbergh D, et al. Journal of Luminescence, 2000, 87-89: 454. [8] Du Y P, Zhang Y W, Sun L D, et al. J. Phys. Chem. C, 2008, 112: 12234. [9] Calleja J M, Cardona M. Phys. Rev. B, 1977, 16: 3753. [10] Kaschner A, Siegle H, Kaczmarczyk G, et al. Appl. Phys. Lett., 1999, 74: 3281. [11] Wang X B, Song C, Geng K W, et al. J. Phys. D: Appl. Phys., 2006, 39: 4992. [12] Wang Meili, Huang Changgang, Huang Zhi, et al. Optical Materials, 2009, 31: 1502. [13] Du Y P, Zhang Y W, Sun L D, et al. Phys. Chem. C, 2008, 112: 12234. [14] Cheng B C, Zhang Z D, Liu H J, et al. J. Mater. Chem., 2010, 20; 7821. [15] Zhang Y Z, Liu Y P, Wu L H, et al. J. Phys. D: Appl. Phys., 2009, 42: 085106.