A polymer acceptor with grafted small molecule acceptor units for high-efficiency organic solar cells

Abstract

Polymerization of small molecule acceptors (SMAs) has been proved to be an effective strategy to design polymer acceptors, in which the polymerization reaction is conducted via the coupling between the...

Quinoxaline-based Y-type acceptors for organic solar cells

“…Based on CH-series SMAs, Chen and co-workers reported a polymeric acceptor, SH-1, by central unit polymerization. 67 Compared to the end-group polymerized SH-2, SH-1 exhibits more ordered intermolecular packing and favorable morphology in blend films, contributing to efficient exciton dissociation and charge transport. Therefore, PM6:SH-1-based devices deliver significantly higher PCE (14.14%) than PM6:SH-2-based devices (6.55%).…”

Quinoxaline-based nonfullerene acceptors with powerful core-functionalization ability enabling efficient solar energy utilization

“…5). 106–108 Compared with TZ1 without fluorine substituents, the fluorinated TZ2 showed downshifted energy levels and better aggregation behavior. 106 When blended with PM6, the TZ2-based OSC presents more efficient exciton dissociation and charge transport, leading to a higher PCE of 7.41% with an improved J SC of 14.94 mA cm −2 , higher than the TZ1-based OSC (4.06%).…”

A Polymer Acceptor with Grafted Small Molecule Acceptor Unit for Efficient All Polymer Organic Solar Cells

“…[34][35][36] To address the aforementioned issues, we have proposed a new approach to construct PSMAs with grafted SMA units based on the conventional polymerization SMA strategy. [37] PSMAs designed using the grafted SMA strategy feature free end groups that facilitate intermolecular packing, which in turn benefits electron transport. Furthermore, extended conjugation and dual charge transport channels can be formed.…”