Size dependent luminescence properties of Er3+ doped nano-crystalline Y2O3

作者：Xiao Si Guo^*; Yang Xiao Liang; Ding Jian Wen; Yan Xiao Hong

来源：Acta Physica Sinica, 2009, 58(1): 165-173.

• Er3+ ion
• nano
• luminescence
• energy transfer

Er3+ doped Y2O3 nano-crystals with different size are prepared using combustion method. Size effect on luminescence properties of Er doped Y2O3, nano crystals are investigated. No shift of the absorption peak in the photo-acoustic spectra is observed with the decrease of the Y2O3 particle size, indicating that the size induced energy shifts of the rare-earth levels are negligible. However, the emission spectra under 488 nm excitation indicate that the ratio of the intensity of S-4(3/2) -> I-4(15/2) transition to that of H-2(11/2) -> I-4(15/2) decreases with the decrease of the particle size. It is believed that the rate of hypersensitive transition of H-2(11/2) -> I-4(15/2) increases with the decrease of the particle size more quickly than that of transition of S-4(3/2) -> I-4(15/2). The time dependence of the 554 nm luminescence decay excited by 518 nm reveals that the rate of up-converted energy transfer occurring between two Er3+ ions in S-4(3/2) state increases with the decrease of the particle size.

• 出版日期2009-1
• 单位湘潭大学; 南京航空航天大学