Breaking 20% Efficiency of all‐Polymer Solar Cells via Benzo[1,2‐d:4,5‐d′]Bisthiazole‐Based Terpolymer Donor Strategy for Fine Morphology Optimization
Sichuan University · Chengdu University of Technology
Abstract
Abstract Developing high‐performance all‐polymer solar cells (all‐PSCs) remains a challenge due to the difficulty in controlling the morphology of polymer blends. In this study, benzo[1,2‐d:4,5‐d′]bisthiazole (BBTz) is incorporated into the PM6 main chain to create a series of terpolymer donors, leveraging the entropy increase and superior miscibility with polymer acceptors to modulate blend morphology. The introduction of BBTz broadened the absorption range, enhanced film crystallinity, and significantly improved donor‐acceptor miscibility through its low dipole moment and high electrostatic potential. This facilitated the formation of nanofiber structures in the active layer, thus optimizing blend…
Citation impact
- FWCI
- 32.38
- Percentile
- 100%
- References
- 42
Authors
7Topics & keywords
- Materials science
- Morphology (biology)
- Copolymer
- Polymer
- Chemical engineering
- Composite material