Conjugated backbone optimization of an all-fused-ring acceptor for efficient and stable organic solar cells

Three all-fused-ring acceptors with different conjugated backbone are designed as acceptor materials for organic solar cells. It is found that the horizontally extended conjugation of all-fused-ring acceptors leads to better photovoltaic performance compared to the vertically extended analogue. The results provide a guideline for designing high-performance and stable all-fused-ring acceptor materials. Three all-fused-ring acceptors with different conjugated backbones are designed as acceptors for organic solar cells. The different conjugated extensions of the acceptors significantly impact the photovoltaic performance and stability of devices.