| 초록 |
Organic solar cells (OSCs) have considerable academic and industrial interest, owing to several advantages, such as their light weight, facile fabrication, low cost, good flexibility, and semitransparency. Introducing small-molecule donors (SMDs) to all-small-molecule OSCs has some merits relative to polymer donors, such as well-defined chemical structure, easy purification, definite molecular weight, and small batch-to-batch variations, which is important for commercial application. In this work, we designed and synthesized the SMDs with A-π-D-π-A architecture, based benzo[1,2-b:4,5-b’]dithiophene core which holds a larger coplanar core and extended conjugation length. The new SMDs was to match well with the small-molecule non-fullerene acceptors that usually have low-lying energy levels. These results show its promising for high performance OCSs, and suggest great process to design highly efficient SMDs in all-small-molecule OSCs |
