d0mh01805h-f5 Published on 04/04/2021 at 1900 × 987 in d0mh01805h-f5 Cross-section HRSEM BSE micrographs of PCE11:PCBM films after thermal annealing at 130 °C for various time periods and VPI Cross-section HRSEM BSE micrographs of PCE11:PCBM films after thermal annealing at 130 °C for various time periods and VPI