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Er3+ doped Y2O3 nano-crystals with different size are prepared using combustion method. Size effect on luminescence properties of Er3+ doped Y2O3 nano crystals are investigated. No shift of the absorption peak in the photo-acoustic spectra is observed with the decrease of the Y2O3particle size, indicating that the size induced energy shifts of the rare-earth levels are negligible. However, the emission spectra under 488nm excitation indicate that the ratio of the intensity of 4S3/2→4I15/2 transition to that of 2H11/2→4I15/2 decreases with the decrease of the particle size. It is believed that the rate of hypersensitive transition of 2H11/2→4I15/2 increases with the decrease of the particle size more quickly than that of transition of 4S3/2→4I15/2. The time dependence of the 554nm luminescence decay excited by 518nm reveals that the rate of up-converted energy transfer occurring between two Er3+ ions in 4S3/2 state increases with the decrease of the particle size.
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Keywords:
- Er3+ ion /
- nano /
- luminescence /
- energy transfer
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物理学报. 2009, 58(1): 165-173.
doi: 10.7498/aps.58.165.
尺寸效应对Er3+掺杂纳米Y2O3的发光特性的影响
- 收稿日期: 2007-12-30
- 修回日期: 2008-06-26
- 刊出日期: 2009-01-20
English Abstract
Size dependent luminescence properties of Er3+ doped nano-crystalline Y2O3
- Received Date:
30 December 2007
- Accepted Date:
26 June 2008
- Published Online:
20 January 2009
Abstract: Er3+ doped Y2O3 nano-crystals with different size are prepared using combustion method. Size effect on luminescence properties of Er3+ doped Y2O3 nano crystals are investigated. No shift of the absorption peak in the photo-acoustic spectra is observed with the decrease of the Y2O3particle size, indicating that the size induced energy shifts of the rare-earth levels are negligible. However, the emission spectra under 488nm excitation indicate that the ratio of the intensity of 4S3/2→4I15/2 transition to that of 2H11/2→4I15/2 decreases with the decrease of the particle size. It is believed that the rate of hypersensitive transition of 2H11/2→4I15/2 increases with the decrease of the particle size more quickly than that of transition of 4S3/2→4I15/2. The time dependence of the 554nm luminescence decay excited by 518nm reveals that the rate of up-converted energy transfer occurring between two Er3+ ions in 4S3/2 state increases with the decrease of the particle size.
-
Keywords:
- Er3+ ion /
- nano /
- luminescence /
- energy transfer
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