18.2%-efficient ternary all-polymer organic solar cells with improved stability enabled by a chlorinated guest polymer acceptor

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

Journal

Joule Elsevier

Book Volume: 7

Pages Range: 221-237

Journal Issue: 1

DOI: 10.1016/j.joule.2022.12.007

Abstract

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.

Authors with CRIS profile

Mingjian Wu Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Involved external institutions

Wuhan University CN China (CN) Xi’an Jiaotong-Liverpool University (XJTLU) CN China (CN) The Chinese University of Hong Kong (CUHK) CN China (CN) Shandong-University (SDU) CN China (CN) City University of Hong Kong (CityU) CN China (CN)

How to cite

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://dx.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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