Current-induced degradation method for stabilization of a-Si solar cell

Light-induced degradation and light-induced degradation after current-induced degradation of several types of a-Si solar cells were compared in order to investigate the difference between current-induced degradation and light-induced degradation. Very little difference in the efficiency after long-term light irradiation is observed between samples which were degraded by light- after current-induced degradation and those which were degraded by light only. Little difference in the collection efficiency spectra and the depth profiles of the DICE (dynamic inner collection efficiency) is also observed between the cells degraded by these two processes. The possibility of applying the current-induced degradation method to the stabilization of a-Si solar modules is indicated.