Preparation and Spectroscopic Characteristics of CaAl2Si2O8∶Eu, Ce, Tb Fluorescent Material
XU Dan-zhi1, FENG Jing1, YANG Xiao-yun2, ZU En-dong1, CUI Xiao-ying2, LIN Jin-chang2, DONG Kun2*
1. School of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
2. Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China
Abstract：CaAl2Si2O8∶Eu, Ce, Tb fluorescent material were synthesized with high temperature solid phase method.The fluorescent materials were characterized with fluorescence spectroscopy (PL), Raman spectroscopy (Raman) and X-ray diffraction (XRD).The phase compositions of the samples were studied with XRD. It was shown that the Eu2+ substitution of Ca2+ did not induce the changes of the structure of the matrix. Raman spectroscopy confirmed the presence of silicon-oxygen tetrahedron and aluminum oxygen tetrahedrons. Raman spectra also confirmed that the amount of Eu2+ substitution Ca2+ was related to the degree of crystal morphology distortion. PL spectra of the samples shows that the emission peak at 325 nm wavelength excitation, the emission peak of the sample was shown to be a strong emission peak at 426 nm (blue region) and a weak emission peak at 541 nm (green region). The emission peaks can be fitted with Gaussian to three fitting peaks at 393, 419 and 474 nm. After combining the analysis and comparison, and ultimately determine when Eu∶Ce∶Tb=1∶1∶1. 5 the sample shows the strongest fluorescence intensity. CIE chromaticity diagram shows that the samples are emitting blue fluorescence. The material has good color rendering, color temperature is low, which is a kind of suitable blue fluorescent LED material with ultraviolet and near ultraviolet excitation.
[1] DING Wei-jia, ZHANG Mei, WANG Jing, et al(丁唯嘉, 张 梅, 王 静, 等). Chinese Journal of Luminescence(发光学报), 2011, 32(3): 256.
[2] HE Xiao, ZHANG Sheng-li, ZU En-dong, et al(贺 晓, 张利胜, 祖恩东, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2016，36(1): 146.
[3] Clabau F, Garcia A, Bonville P, et al. Solid State Chem., 2008, 181(6): 1456.
[4] Setlur A A. Electrochemical and Solid-State Letters, 2012, 15(6): 21.
[5] Graeve O A, Kanakala R, Madadi A, et al. Biomaterials, 2010, 31(15): 4259.
[6] Zhu C F，Yang Y X，Liang X L, et al. Journal of Luminescence, 2007, 126(2): 707.
[7] DUAN Ren-guan，LIANG Kai-ming, GU Shou-ren，et al(段仁官, 梁开明, 顾守仁, 等). Journal of the Chinese Ceramic Society(硅酸盐学报), 1997，(3): 305.
[8] Parc R L，Champagnon B, Dianoux J, et al . Journal of Non-Crystalline Solids, 2003, 323(1-3): 155.
[9] WU Jing, ZHANG Ji-lin, ZHOU Wen-li, et al(吴 静, 张吉林, 周文理, 等). Chemical Journal of Chinese Universities(高等学校化学学报), 2013, 34(2): 306.
[10] Qiao Y P. Acta Physico-Chimica Sinica, 2012, 28(3): 706.
[11] Yu Y, Liu Z, Dai N, et al. Optics Express, 2011, 19(20): 1473.
[12] Dai W B. Journal of Materials Chemistry C, 2014, 2(20): 3951.
[13] Jung K Y, Kim J H. Journal of Luminescence, 2008, 128(12): 2004.
