材料科学
有机太阳能电池
能量转换效率
聚合物太阳能电池
制作
结晶
异质结
活动层
对偶(语法数字)
光电子学
平面的
纳米技术
化学工程
图层(电子)
复合材料
计算机科学
艺术
文学类
计算机图形学(图像)
聚合物
医学
替代医学
薄膜晶体管
病理
工程类
作者
Waqar Ali Memon,Yiwu Zhu,Shilong Xiong,Hui Chen,Hanjian Lai,Li Wang,Heng Li,Mingpeng Li,Feng He
标识
DOI:10.1021/acsami.4c17639
摘要
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 a dual additive strategy using 3,5-dichlorobromobenzene (DCBB) and 1,8-diiodooctane (DIO) to optimize the morphology of both bulk-heterojunction (BHJ) and quasi-planar heterojunction (Q-PHJ) based on donor D18 and acceptor BTP-eC9. The systematic results reveal that the dual additive strategy significantly promotes phase separation while inhibiting excessive aggregation, which, in turn, improves molecular order and crystallization. As a result, BHJ and Q-PHJ OSCs processed with dual additive DIO + DCBB achieve impressive power conversion efficiencies of 17.77% and 18.60%, respectively, the highest reported values for dual additive-processed OSCs. The superior performance is attributed to improved charge transport and reduced recombination losses, as evidenced by higher short-circuit current densities (JSC) and fill factors (FF). Importantly, Q-PHJ OSCs processed with either DCBB or DIO + DCBB, in comparison to BHJ OSCs, exhibit exceptional shelf-stability, maintaining 80% of their initial power conversion efficiency after 2660 and 2193 h, respectively. These findings underscore the potential of dual additive strategies to advance the development of stable, high-efficiency OSCs suitable for large-area fabrication, marking a significant step forward in renewable energy technology.
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