Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-25T17:36:23.068Z Has data issue: false hasContentIssue false

Model for Staebler-Wronski Degradation Deduced from Long-Term, Controlled Light-Soaking Experiments

Published online by Cambridge University Press:  17 March 2011

Bolko von Roedern
Affiliation:
National Renewable Energy Laboratory (NREL) 1617 Cole Blvd., Golden, CO 80401-3393, U.S.A.
Joseph A. del Cueto
Affiliation:
National Renewable Energy Laboratory (NREL) 1617 Cole Blvd., Golden, CO 80401-3393, U.S.A.
Get access

Abstract

Long-term light-soaking experiments of amorphous silicon photovoltaic modules have now established that stabilization of the degradation occurs at levels that depend significantly on the operating conditions, as well as on the operating history of the modules. We suggest that stabilization occurs because of the introduction of degradation mechanisms with different time constants and annealing activation energies, depending on the exposure conditions. Stabilization will occur once a sufficient accumulation of different degradation mechanisms occurs. We find that operating module temperature during light-soaking is the most important parameter for determining stabilized performance. Next in importance is the exposure history of the device. The precise value of the light intensity seems least important in determining the stabilized efficiency, as long as its level is a significant fraction of 1-sun.

Type
Research Article
Copyright
Copyright © Materials Research Society 2000

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. Luft, W., Roedern, B. von, Stafford, B., and Mrig, L., Conference Record of the 23rd IEEE Photovoltaic Specialists Conf. (1993), pp. 860866.Google Scholar
2. Luft, W. and Roedern, B. von, Conference Record of the 24th IEEE Photovoltaic Specialists Conf. (also 1st World Conf. On Photovoltaic Energy Conversion), (1994), pp. 457463.Google Scholar
3. Mrig, L., Burdick, J., Luft, W., and Kroposki, B., ibid, pp. 528530.Google Scholar
4. Roedern, B. von, Kroposki, B., Strand, T., and Mrig, L., Proccedings of the 13th European Photovoltaic Solar Energy Conference (H.S. Stephens & Associates, publishers), (1995), pp. 16721676.Google Scholar
5. Cueto, J. del and Roedern, B. von, Progress in Photovoltaics: Research and Applications 7, 101, (1999)Google Scholar
6. Delahoy, A.E., Tonen, T., Cambridge, J.A., Johnson, M., Michalski, L., and Kampas, F.A., Proceedings of the 8th European Photovoltaic Solar Energy Conference (Solomon, I., Equer, B., Helm, P., Eds., Kluwer, Dordrecht), (1988) p. 646.Google Scholar
7. Roedern, B. von, Materials Research Society Symposia Proc. “Amorphous Silicon Technology– 1991,” Vol. 219, (1991), p. 493.Google Scholar
8. Redfield, D. and Bube, R., Materials Research Society Symposia Proc. “Amorphous Silicon Technology – 1993,” Vol. 297, (1993) p. 607.Google Scholar
9. Han, D. and Fritzsche, H., American Institute of Physics Conference Proceedings “Optical Effects in Amorphous Semiconductors,” Vol. 120, (1984), p. 296.Google Scholar
10. Mariucci, L., Sinno, G., Minarini, C., and Mittiga, A., Journal of Non-Crystalline Solids 198–200, (1996), p. 482.Google Scholar
11. Stradins, P., Tran, M.Q., and Fritzsche, H., Journal of Non-Crystalline Solids 164–166, (1993), p. 175.Google Scholar
12. Roedern, B. von, Applied Physics Letters 62, (1993), p. 1368.Google Scholar