Figure 3. Experimentally measured RPV transient photo-signals in an optimized PCDTBT:PC₇₁BM solar cell.

Mean electron (faster) and hole (slower) transit times are marked, from which the respective mean mobilities are estimated. The dispersive nature of charge transport in the studied solar cells is highlighted by shaded boxes marking the range of carrier arrival times. Thin curves show recorded data, while bold lines show data smoothed by adjacent averaging. The short timescales for large resistances were omitted for clarity.