Simultaneous enhancement of efficiency, stability and stretchability in binary polymer solar cells with a three-dimensional aromatic-core tethered tetrameric acceptor.

ABSTRACT: Polymer solar cells (PSCs) leverage blend films from polymer donors and small-molecule acceptors (SMAs), offering promising opportunities for flexible power sources. However, the inherent rigidity and crystalline nature of SMAs often embrittle the polymer donor films in the constructed bulk heterojunction structure. To address this challenge, we improved the stretchability of the blend films by designing and synthesizing a tethered giant tetrameric acceptor (GTA) with increased molecular weight that promotes entanglement of individual SMA units. The key to this design is using tetraphenylmethane as the linking core to create a three-dimensional and high C₂ symmetry structure, which successfully regulates their aggregation and relaxation behavior. With GTA as the acceptor, its bl

SUBMITTER: Bai Y 

PROVIDER: S-EPMC11841366 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature