Published online by Cambridge University Press: 01 January 1993
Light soaking of a-Si:H solar cells gives rise to a decrease in the spatially resolved collection efficiency. In the internal collection efficiency distributions measured under bias light conditions two crossing points appear during light soaking. The existence and the shift of these points could be explained by a combined bulk i-layer light soaking effect and a more pronounced collection loss at the p+/i-interface. This spatially non-uniform degradation was confirmed by the Dynamic Inner Collection (DICE) method.