Synergistic Fluorine⋅⋅⋅Sulfur Intra- and Intermolecular Interactions on Dopant-Free Hole Transport Material for Efficient and Stable Inverted Perovskite Solar Cells
Designing dopant-free small-molecule hole transport materials (HTMs) with self-assembly behavior via noncovalent interactions is considered as one effective strategy to achieve high-performance inverted perovskite solar cells (PSCs). Herein, two donor-π bridge-donor (D–π–D) HTMs are presented, TPASF and TPAOF, containing 3,6-dimethoxythieno[3,2-b]thiophene as a core part with 3-fluoro-N,N-bis(4-(m