Preliminary Study of the Degradation of PM6:Y7-based Solar Cells

In this work, we report a degradation study of high-efficiency organic solar cells (OSCs). The active layer uses PM6 as a donor and Y7 as an acceptor material, respectively. High performance of the PM6:Y7-based device is achieved with the power conversion efficiency (PCE) of up to 17.3% under 1 sun illumination for the fresh device. To gain a better understanding of PM6:Y7 stability, we developed the analysis of the degradation process over the storage time. The PCE of the device decreased to 82% of the initial PCE after 888 h. The electrical parameters during the degradation process were extracted from the current density – voltage characteristics (J–V) under light and dark conditions.