ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 5, 2024
Achieving high-performance and stable organic solar cells (OSCs) remains a critical challenge, primarily due to the precise optimization required for active layer morphology. Herein, this work reports dual additive strategy using 3,5-dichlorobromobenzene (DCBB) 1,8-diiodooctane (DIO) optimize morphology of both bulk-heterojunction (BHJ) quasi-planar heterojunction (Q-PHJ) based on donor D18 acceptor BTP-eC9. The systematic results reveal that significantly promotes phase separation while inhibiting excessive aggregation, which, in turn, improves molecular order crystallization. As result, BHJ Q-PHJ OSCs processed with DIO + DCBB achieve impressive power conversion efficiencies 17.77% 18.60%, respectively, highest reported values additive-processed OSCs. superior performance is attributed improved charge transport reduced recombination losses, as evidenced by higher short-circuit current densities (JSC) fill factors (FF). Importantly, either or DCBB, comparison OSCs, exhibit exceptional shelf-stability, maintaining 80% their initial efficiency after 2660 2193 h, respectively. These findings underscore potential strategies advance development stable, high-efficiency suitable large-area fabrication, marking significant step forward renewable energy technology.
Language: Английский