Key Laboratory of Luminescence and Optical Information, Ministry of Education and Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
Abstract：CaMgSi2O6∶Eu samples were synthesized by a normal solid state reaction using CaCO3,MgO, SiO2 and Eu2O3 as starting materials. The properties of structure, VUV excitation and luminescence under VUV excitation were studied. CaMgSi2O6∶Eu belongs to the monoclinic space group, and the crystal structure does not change as the crystal lattice is doped with Eu ions. The emission spectra of CaMgSi2O6∶Eu3+ have revealed an intense and sharp (611 nm) red color emission from Eu 3+ (5D0→7F2) transition under 147 nm VUV excitation. The correlative data shows that the concentration quenching occurs when the Eu3+ mole concentration ranges from 0.02 to 0.10 mol. The emission spectra of CaMgSi2O6∶Eu2+ have revealed an intense and sharp (452 nm) blue color emission from Eu 2+ (5d→4f) transition under 172 nm VUV excitation. It can be seen that the intensity of the emission peak increases with increasing H3BO3 concentration.
[1] Okazaki C, Shiiki M, Suzuki T, et al. J. Lumin., 2000, 87-89: 1280. [2] Ling J, Cheng Kang C, Da Li M. Journal of Alloys and Compounds, 2003, 360: 193. [3] Daud A, Kunimoto T, Yoshimatsu R, et al. ICSE2000 Proceedings, Nov., 2000. [4] You H P, Wu X Y, Zeng X Q, et al. Materials Science and Engineering, 2001, B86:11. [5] Belsky A N, Krupa J C. Displays, 1999, 19: 185. [6] Blasse G, Grabmaier B C. Luminescence Materials. New York: Springer-Verlag, 1994, 22. [7] Shionoya S, et al. Phosphor Handbook. Boca Raton: CRC Press, 1999, 190. [8] Kim Y I, Nahm S H, Im W B. J. Lumin, 2005, 115: 1. [9] QIAO Bin, ZHANG Zhong-tai TANG Zi-long, et al(乔 彬, 张中太, 唐子龙, 等). Journal of Chinese Rare Earth Society(中国稀土学报), 2003, 21: 192. [10] DING Shi-jin, ZHANG Wei, XU Bao-qing, et al(丁士进，张 卫，徐宝庆，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001,21(3): 275.
