Skip to main content Accessibility help
×
Home

Photoluminescence of Eu3+ in Si/SiO2 Nanostructure Films

  • Huimin Liu (a1), Aziz Mahfoud (a1), G. A. Nery (a2), O. Resto (a2), Luis F. Fonseca (a2) and Zvi S. Weisz (a2)...

Abstract

Eu3+ -doped Si/SiO2 nanocomposites were successfully prepared by Ar sputtering deposition on quartz substrates. The optical properties were studied using time-resolved photoluminescence spectroscopy. Excited by intense picosecond laser pulses with energy greater than1GW/cm2 and wavelength at 532nm the observed photoluminescence consists of a rapidly decaying component with life time of ∼1 s and a slowly component with life time of ∼ 2 ms. The former was recognized as coming from Si/SiO2 nanostructures matrix while the latter as coming from the impurity Eu3+ ions. Using the intense laser excitation a two-photon absorption by silicon matrix occurred, resulting in photo-induced carriers produced in conduction band. A direct recombination from Si/SiO2 nanostructure host gives a weak but fast emission, and creates a large number of nonequilibrium phonon. For Eu3+ emission a set of 5D0 to 7F multiplet transitions were identified. In addition to the direct excitation by 532nm the excited state 5D0 of Eu3+ ions was also found to be populated due to energy transfer from silicon matrix. The mechanism of phonon-assisted energy transfer is discussed.

Copyright

References

Hide All
1. Chryssou, C. E., Kenyon, A. J., Iwayama, T. S., and Pitt, C. W., Hole, E., Appl.Phys.Lett, 75, 2011 (1999).
2. Gregorkiewicz, T., Thao, D. T. X., Langer, J. M., H. Bekman, H. P. Th., Bresler, M. S., Michel, J. and Kimerling, L. C., Phys.Rev.B, 61, 5369 (2000).
3. Fujii, M., Yoshida, M, Hanzawa, Y., Hayashi, S. and Yamamoto, K., J.Appl.Phys., 84, 4525 (1998).
4. Macfarlane, R.M. and Shelby, R.M., in Spectroscopy of Solids Containing Rare-Earth ions, ed., by Kaplyanskii, A.A. and Macfarlane, R.M. (North-Holland, Amsterdam, 1987), p.51.
5. Yano, R., Mitsunaga, M. and Uesugi, N., J.Opt.Soc.Am.B, 9, 992 (1992).
6. Fonseca, L. F., Resto, O., Soni, R. K., Buzaianu, M., Weisz, S. Z., and Gomez, M., Materials Science and Engineering B to be published.
7. Fonseca, L. F., Resto, O., Gupta, S., Katiyar, R. S., Weisz, S. Z., Goldstein, Y., Many, A., and Shapir, J., Proc. of the ICPS. CD-version (1998).
8. Geohegan, D.B., Puretzky, A.A., Duscher, G. and Pennycook, S.J., Appl.Phys.Lett., 73, 438 (1998).
9. Liu, H. and Powell, R.C., Boatner, L.A., Jour.Appl.Phys., 70, 20 (1991); Phys.Rev.B, 44, 2461 (1991); 49, 6323 (1994).
10. Brunetto, N. and Amato, G., Thin Solid Films 297, 122 (1997)
11. Delerue, C., Lannoo, M., and Allan, G., J. Luminescence 57, 249 (1993).
12. Vikhnin, V., Liu, H., Jia, W., Phys.Letters A, 245, 307 (1998); Ferroelectrics, 75, 1 (2000).
13. Vikhnin, V., Liu, H., Jia, W. and Kapphan, S., J. Lumin., 83–84, 91 (1999).
14. Reisfeld, R. and Eckstein, Y., J.Non-Cryst.Solids, 11, 261 (1973).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed