Traps and transport resistance are the next frontiers for stable non-fullerene acceptor solar cells.

ABSTRACT: Stability is one of the most important challenges facing material research for organic solar cells (OSC) on their path to further commercialization. In the high-performance material system PM6:Y6 studied here, we investigate degradation mechanisms of inverted photovoltaic devices. We have identified two distinct degradation pathways: one requires the presence of both illumination and oxygen and features a short-circuit current reduction, the other one is induced thermally and marked by severe losses of open-circuit voltage and fill factor. We focus our investigation on the thermally accelerated degradation. Our findings show that bulk material properties and interfaces remain remarkably stable, however, aging-induced defect state formation in the active layer remains the primary cause of t

SUBMITTER: Wopke C 

PROVIDER: S-EPMC9249898 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature