Long Term Stability of a-Si:H Thin Film Modules

Long-term experiments of amorphous silicon photovoltaic modules have now established that stabilization of the degradation occurs at levels that depend significantly on the operation conditions, as well on the 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. The effects of degradation and annealing on the energy production of an a-Si:H thin film module have been studied. These effects have been modelled and introduced into the existing time-invariant energy rating model, and studied to see if this modification improves the energy prediction accuracy for a-Si:H modules. The differences between the prediction procedure between this technology and c-Si technology have also been noted.

NIKOLAEVA-DIMITROVA Miglena;  KENNY Robert;  DUNLOP Ewan; 

2006-11-28

WIP-Renewable Energies

JRC32713

https://publications.jrc.ec.europa.eu/repository/handle/JRC32713,