We report a double-cable polymer acceptor (PYT-N) featuring a Y-series backbone with pendant NDI units. When incorporated as a third component in D18:eC9 blends, the ternary device achieves a PCE of 20.05%. PYT-N enhances charge transport, suppresses recombination, and improves morphology stability owing to its high glass transition temperature.
Q. Tan, S. Liang, Y. Cheng, L. Liu, H. Fan, B. Wang, C. Zhang, C. Xiao and W. Li, Chem. Commun., 2026, Accepted Manuscript , DOI: 10.1039/D6CC01466F
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