Research Highlights: Pushing the Efficiency of High Open-Circuit Voltage Binary Organic Solar Cells by Vertical Morphology Tuning
![](https://webarchive.lib.cuhk.edu.hk/20221207052549im_/https://www.phy.cuhk.edu.hk/xhlu/wp-content/uploads/2022/04/guilongAS2022-1-165x150.png)
The tuning of vertical morphology is critical and challenging for organic solar cells (OSCs). In this work, a high open-circuit voltage (VOC) binary D18-Cl/L8-BO system is attained while maintaining the high short-circuit current (JSC) and fill factor (FF) by employing 1,4-diiodobenzene (DIB), a volatile solid additive. It is suggested that DIB can act as a linker between donor or/and acceptor molecules, which significantly modifies the active layer morphology.… Read More