Halogenated diphenyl ether solvent additives enable ∼20% efficiency organic solar cells and high-performance opaque/semitransparent modules.

ABSTRACT: Solvent additives are considered as versatile tools to optimize morphology for boosting power conversion efficiency (PCE) of organic solar cells (OSCs). Here, three halogenated diphenyl ether (DPE) solvent additives (fluorinated DPE-F, chlorinated DPE-Cl and brominated DPE-Br) are developed to optimize active-layer (PM6:L8-BO) morphology. With the halogen atomic weight increases, three additives show a gradually increasing boiling point, while DPE-Cl and DPE-Br have similar but a much higher dipole moment compared to DPE-F. The higher boiling point and dipole moment of DPE-Br are expected to enhance the non-covalent interaction between the additive and L8-BO during the active layer film-forming process, offering improved intermolecular packing, charge transport, exciton dissociation and ch

SUBMITTER: Zhou Y 

PROVIDER: S-EPMC12485983 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature