Calculation of Optical Parameters and Investigation of Luminescence Spectra of Dy3+ Doped Boroaluminasilicate Glasses
Dy<3+> -doped boroaluminasilicate (BAS) glasses with high effective visible fluorescence emission were synthesized. Optical absorption and fluorescence spectra of these glasses have been studied. Using J-O theory, the intensity parameters (×10<-20>cm2)Ω<,2>= 4.75, Ω<,4>=0.98 and Ω<,6>=2.24 have been evaluated with a reasonable agreement between the measured and calculated f- value. These parameters were used to predict various spectroscopic properties of excited levels of Dy<3+> in BAS glasses. The bright yellow emission at 575nm (<4>F<,9/2>→ <6>H<,13/2>) has been observed, apart from <4>F <,9/2>→6H<,15/2> (482nm) and <4>F<,9/2>→<6>H <,11/2> (662nm) emission transitions with excitation at 451nm (<6>H<,15/2>→<4>H<,15/2>). Stimulated emission cross-sections of the emission bands have been computed based on the measured Δλ. Concentration quenching will occur when concentration of Dy<3+> exceeds 1.0％ (mole fraction) and the quenching mechanism involves quadrupole-quadrupole interaction.
boroaluminasilicate glass Dy<3+> ions J-O parameters concentration quenching lifetime rare earths
Lu Chunhua(陆春华) Zhang Yan(张焱) Ni Yaru(倪亚茹) Tan Weimin(谭伟民) Xu Zhongzi(许仲梓)
College of Materials Science & Technology, Nanjing University of Technology, Nanjing Jiangsu 210009, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
350-354
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）