Hostname: page-component-6bf8c574d5-956mj Total loading time: 0 Render date: 2025-02-19T12:02:14.164Z Has data issue: false hasContentIssue false
  • English
  • Français

Time Dependence of the Metastable, Optically-Induced Esr in a-Si:H

Published online by Cambridge University Press:  28 February 2011

C. Lee ,
W. D. Ohlsen  and
P. C. Taylor
C. Lee
Affiliation:
Department of Physics, University of Utah, Salt Lake City, UT 84112
W. D. Ohlsen
Affiliation:
Department of Physics, University of Utah, Salt Lake City, UT 84112
P. C. Taylor
Affiliation:
Department of Physics, University of Utah, Salt Lake City, UT 84112
Get access

Abstract

The occurrence of optically-induced, metastable changes in the paramagnetism in films of a-Si:H is well known. The effect was first observed with white light in powdered samples, but recent experiments with both white and monochromatic light incident on films on substrates have observed a similar effect. This optically-induced ESR appears to be stable at temperatures < 400 K. Typical inducing curves for samples with initial dark spin densities ns > 1016 spins/cm3 approach a power law behavior (ns ∼ t1 / 3) at long times. However, when the dark spin density is less than 1016 spins/cm3, the samples exhibit an inducing curve (on a log-log scale) with a continuously decreasing slope. The curve does not exhibit a unique power law behavior over an extended range of time and is at all times < t1 / 3.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 70: Symposium E – Materials Issues in Amorphous-Semiconductor Technology , 1986 , 225
Copyright
Copyright © Materials Research Society 1986

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

REFERENCES

1. Dersch, H., Stuke, J. and Beichler, J., Appl. Phys. Lett. 38, 456 (1981).Google Scholar
2. Staebler, D.L. and Wronski, C.R., Appl. Phys. Lett. 31, 292 (1977); J. Appl. Phys. 51, 3262 (1980).CrossRefGoogle Scholar
3. Lee, C., Ohl-sen, W.D., Taylor, P.C., Ullal, H.S. and Ceasar, G.P., in AIP Conf. Proc. 120, 205 (1984).CrossRefGoogle Scholar
4. Stutzmann, M., Jackson, W.B. and Tsai, C.C., in AIP Conf. Proc. 120, 213 (1984); Phys. Rev. B 32, 23 (1985).Google Scholar
5. Yokomichi, H., Kumeda, M., Morimoto, A. and Shimizu, T., Jpn. J. Appl. Phys. 24, L569 (1985).Google Scholar
6. Kumie-a, M., Uno, M., Morimoto, A. and Shimizu, T., Jpn. J. Appl. Phys. 25 (1985), in press.Google Scholar
7. Gal, M., Viner, J.M., Taylor, P.C. and Wieting, R.D., Phys. Rev. 931, 4060 (1985).Google Scholar