| 초록 |
In the past decades, fullerene derivatives (PC61BM, PC71BM, etc.) based on polymer solar cells (PSCs) have attracted tremendous attention owing to their high mobility and isotropic electron-transfer properties. Nevertheless, the fullerene derivatives have some intrinsic drawbacks such as small optical absorption coefficient and poor band gap tenability, which restrict a further power conversion efficiency (PCE) increase for PSCs. Thus, non-fullerene semiconducting acceptors are emerging to address these drawbacks with their wide-range tunable energy levels, high absorption coefficients, and easy synthetic accessibility. Herein, we designed and synthesized the A-D-A type non-fullerene acceptors with low band gap. These results demonstrate that the newly developed materials are a promising for high-performance acceptors instead of fullerene derivatives. |
