Positionally heterogeneous non-fully conjugated dimeric acceptors with unilateral conjugated π-bridge enable highly efficient and stable organic solar cells

Key Points

• The aim is to design and synthesize new dimeric acceptors that improve the efficiency and stability of organic solar cells.
• Designed dimeric acceptors using a unilateral conjugated π-bridge strategy.
• Explored positional isomerism at the π-bridge site.
• Synthesized two dimeric acceptors, DYTC6T-V-out and DYTC6T-V-in.
• DYTC6T-V-in shows superior performance compared to DYTC6T-V-out.
• Enhanced light absorption and charge transport observed with DYTC6T-V-in.
• Achieved higher efficiency and stability in organic solar cells using the new dimeric acceptor.