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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  and
Joseph A. del Cueto
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.
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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
Information
MRS Online Proceedings Library (OPL) , Volume 609: Symposium A – Amorphous & Heterogeneous Silicon Thin Films – 2000 , 2000 , A10.4
Copyright
Copyright © Materials Research Society 2000

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References

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