Sun R, Wang T, Fan Q, Wu M, Yang X, Wu X, Yu Y, Xia X, Cui F, Wan J, Lu X, Hao X, Jen AK, Spiecker E, Min J (2023)
Publication Type: Journal article
Publication year: 2023
Book Volume: 7
Pages Range: 221-237
Journal Issue: 1
DOI: 10.1016/j.joule.2022.12.007
Although the polymer/polymer blend systems still lag far behind small-molecule-acceptor-based counterparts in power conversion efficiencies (PCEs), the ternary blending strategy provides a simple and promising avenue to achieve an ideal nanoscale blend morphology for reducing the efficiency-stability gap of all-polymer solar cells (all-PSCs). Herein, we designed a narrow-band-gap chlorinated polymer acceptor PY-2Cl and incorporated into the PM6:PY-1S1Se host blend. The addition of PY-2Cl extends the absorption spectra, improves the molecular packing of host-guest acceptors, solidifies the blend microstructure, and suppresses the non-radiative recombination. Consequently, the PCE of the ternary blend is improved up to 18.2% (certified value 17.8%), which represents the highest PCE reported for all-PSCs so far. Impressively, the ternary blend exhibited smaller Urbach energy and better operation stability than did the corresponding binary systems. This work heralds a brighter future for accelerating the development of high-performance all-polymer systems by molecular design and ternary strategy.
APA:
Sun, R., Wang, T., Fan, Q., Wu, M., Yang, X., Wu, X.,... Min, J. (2023). 18.2%-efficient ternary all-polymer organic solar cells with improved stability enabled by a chlorinated guest polymer acceptor. Joule, 7(1), 221-237. https://doi.org/10.1016/j.joule.2022.12.007
MLA:
Sun, Rui, et al. "18.2%-efficient ternary all-polymer organic solar cells with improved stability enabled by a chlorinated guest polymer acceptor." Joule 7.1 (2023): 221-237.
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