An Indacenodithienothiophene ‐Based Wide Bandgap Small Molecule Guest for Efficient and Stable Ternary Organic Solar Cells

In this study, IDTR and binary systems have complementary absorption characteristics and cascade alignment. The morphology analysis shows that the introduction of IDTR makes it have strong crystallinity, good miscibility, and reasonable vertical phase distribution, thus achieving higher and more balanced charge transport behavior. The PCE is significantly improved, and the continuously illuminated T80 successfully achieved excellent device stability of nearly 400  h. AbstractThe strategic and logical development of the third component (guest materials) plays a pivotal and intricate role in improving the efficiency and stability of ternary organic solar cells (OSCs). In this study, a novel guest material with a wide bandgap, named IDTR, is designed, synthesized, and incorporated as the third component. IDTR exhibits complementary absorption characteristics and cascade band alignment with the PM6:Y6 binary system. Morphological analysis reveals that the introduction of IDTR results in strong crystallinity, good miscibility, and proper vertical phase distribution, thereby realizing heightened and balanced charge transport behavior. Remarkably, the novel ternary OSCs have exhibited a significant enhancement in photovoltaic performance. Consequently, open-circuit voltage (VOC), short-circuit current (JSC), and fill factor (FF) have all witnessed substantial improvements with a remarkable power conversion efficiency (PCE) of 18.94% when L8-BO replaced Y6. Beyond the pronounced imp...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research