Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-17T17:21:02.871Z Has data issue: false hasContentIssue false
  • English
  • Français

Photoluminescence from Nanoscale Si in a-SiOxMatrix

Published online by Cambridge University Press:  17 March 2011

I. Umezu ,
K. Yoshida ,
M. Inada  and
A. Sugimura
I. Umezu
Affiliation:
Department of Applied Physics, Konan University, Kobe 658-8501, Japan High Technology Research Center, Konan University, Kobe 658-8501, Japan
K. Yoshida
Affiliation:
Department of Applied Physics, Konan University, Kobe 658-8501, Japan High Technology Research Center, Konan University, Kobe 658-8501, Japan
M. Inada
Affiliation:
High Technology Research Center, Konan University, Kobe 658-8501, Japan
A. Sugimura
Affiliation:
Department of Applied Physics, Konan University, Kobe 658-8501, Japan High Technology Research Center, Konan University, Kobe 658-8501, Japan
Get access

Abstract

We prepared a-SiOx (x < 2.0) films by co-sputtering Si and SiO2 targets and found that these films included nano-scaled a-Si regions in a-SiOx matrix. The structure of the films was evaluated by X-ray photoemission spectroscopy (XPS) and infrared absorption. The XPS spectra in the a-SiOx films showed two Si 2p peaks around 99.6 and 104 eV. This indicates that the a-SiOx films were composed of Si and a-SiO2 regions. The optical gap energy of this system rapidly increased when x exceeded 0.7. The rapid increase in the optical gap of this system indicates the formation of nanometer sized Si islands. The photoluminescence (PL) peak energy of this material decreased with increasing temperature above 60 K when x was less than 0.7. On the other hand, when x exceeds 0.7, the PL peak energy increases with temperature above 60 K. The quenching of PL intensity also takes place at 60 K. These results indicate a film structure change at x = 0.7, and recombination path and carrier distribution changes at 60 K. A correlation between film structure and PL properties are discussed. PL properties in this system are explained by superposition of the PL peak from nanoscale Si and a-SiO2 matrix.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 638: Symposium F – Microcrystaline & Nanocrystalline Semiconductors-2000 , 2000 , F5.19.1
Copyright
Copyright © Materials Research Society 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Canham, L.T., Appl. Phys. Lett. 57, (1990) 1046.Google Scholar
2. Yamada, Y., Orii, T., Umezu, I., Takeyama, S. and Yoshida, T., Jpn. J. Appl. Phys. 35, (1996) 1361–1365.Google Scholar
3. Yosida, Y., Takeyama, S., Yamada, Y. and Mutoh, K., J. Appl. Phys. 68, (1996) 1772.Google Scholar
4. Furukawa, S. and Miyasato, T., Jpn. J. Appl. Phys. 27, (1988) L2207.Google Scholar
5. Zacharias, M., Dimova-Malinovska, D. and Stutzmann, M., Philos. Mag. B 73, (1996) 799.Google Scholar
6. Knights, J.C., Street, R.A. and Lucovsky, G., J. Non-Cryst. Solids 35/36, (1980) 279.Google Scholar
7. Kenyon, A.J., Chen, G. and Chen, P., J. Appl. Phys. 79, (1996) 9291.Google Scholar
8. Zhu, M., Han, Y., Wehrspohn, R.B., Godet, C. and Etemadi, R., J. Appl. Phys. 83, (1998) 5386.Google Scholar
9. Skuja, L.: J. Non-Cryst. Solids 149, (1992) 77.Google Scholar
10. Kenyon, A.J., Trwoga, P.F., Pitt, C.W. and Rehm, G., J. Appl. Phys. 79, (1996) 9291.Google Scholar
11. Rinnert, H., Vergnat, M., Marchal, G. and Burneau, A., Appl. Phys. Lett 72, (1998) 3157.Google Scholar
12. Street, R.A.. Hydrogenated amorphous silicon (Cambridge University Press, 1991)Google Scholar
13. Umezu, I., Murota, T., Kawata, M., Takashima, Y., Yoshida, K., Inada, M. and Sugimura, A., Jpn. J. Appl. Phys. 39 Part2, (2000) L844–L846.Google Scholar