Upconversion luminescence of Er3+, Tm3+ and Yb3+Co-doped Gd3Ga5O12 nanocrystals

作者：Li Yanhong^*; Lu Haiyan; Song Guoyi; Zhang Xing'ao

来源：Journal of Wuhan University of Technology-Materials Science Edition, 2014, 29(1): 13-18.

DOI：10.1007/s11595-014-0859-x

• Gd3Ga5O12:Er3+,Tm3+,Yb3+ nanocrystals
• combustion method
• upconversion luminescence

A series of Er3+, Tm3+ and Yb3+ doped Gd3Ga5O12 nanocrystals were prepared by a combustion method. The X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and upconversion (UC) emission spectra were used to characterize the samples. The results of XRD indicate that Gd3Ga5O12: Er3+, Tm3+, Yb3+ nanocrystals with cubic phase can be obtained. Under the excitation of a 980 nm laser, the different rare earth ions doped Gd3Ga5O12 nanocrystals show upconversion luminescence involving the green emission attributed to the H-2(11/2)-> I-4(15/2), S-4(3/2)-> I-4(15/2) transitions of Er3+ ions, respectively, the red emissions assigned to the F-4(9/2)-> I-4(15/2) transitions of Er3+ ions and the (1)G(4)-> F-3(4) as well as F-3(2,3)-> H-3(6) transitions of Tm3+ ions, respectively, the blue emission attributed to (1)G(4)-> H-3(6) transitions of Tm3+ ions, and the near-infrared assigned to the H-3(4)-> H-3(6) transitions of Tm3+ ions. The CIE coordinates for the samples are calculated. The dependence of their upconversion luminescence properties on Yb3+ ion concentration is investigated.

• 出版日期2014-2
• 单位沈阳化工大学; 辽宁大学