Non-fused core-linked star-shaped oligomer acceptors for stable binary organic solar cells with over 19% efficiency

Sun, Cheng; Wang, Jianxiao; Bi, Fuzhen; Jiang, Huanxiang; Yang, Chunming; Li, Yonghai; Chu, Junhao; Bao, Xichang

doi:10.1039/d4ee04149f

Energy Environ. Sci.

2025

DOI: 10.1039/d4ee04149f

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Non-fused core-linked star-shaped oligomer acceptors for stable binary organic solar cells with over 19% efficiency

Cheng Sun,

Jianxiao Wang,

Fuzhen Bi

et al.

Abstract: Star-shaped oligomer acceptor represents a promising candidate to high-performance and robust organic solar cells (OSCs). However, the limited diversity of this community acceptors leaves a significant knowledge gap regarding their...

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New Polymeric Acceptors Based on Benzo[1,2‐b:4,5‐b′] Difuran Moiety for Efficient All‐Polymer Solar Cells

Wang,

Feng,

Liu

et al. 2024

Macromol. Rapid Commun.

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In order to realize high‐performance bulk‐heterojunction (BHJ) all‐polymer solar cells, achieving appropriate aggregation and moderate miscibility of the polymer blends is one critical factor. Herein, this study designs and synthesizes two new polymer acceptors (PAs), namely PYF and PYF‐Cl, containing benzo[1,2‐b:4,5‐b′] difuran (BDF) moiety with/without chlorine atoms on the thiophene side groups. Thanks to the preferred planar structure and high electronegativity of the BDF units, the resultant PAs generate strong intermolecular interactions and π‐π stacking in both the neat and blend films. At the same time, the BDF moieties flanked with bulky 2D side groups increase intermolecular space and restrain the excessive entanglement of polymer chains for developed heterojunction miscibility attributes. Consequently, appropriate polymer crystallinity and moderate miscibility between PAs and polymer donor (PD) contribute to harmonious blending morphologies. Eventually, the PM6:PYF‐based solar cells achieve an optimal efficiency of 11.82%. More encouragingly, the PYF serves as an efficient guest acceptor and realizes an improved efficiency of 17.05% in the PM6:PYIT:PYF ternary systems, which is much higher than that of the host system (15.87%). This study highlights the importance of BDF moiety in designing new PAs for high‐performance all‐polymer solar cells.

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New Polymeric Acceptors Based on Benzo[1,2‐b:4,5‐b′] Difuran Moiety for Efficient All‐Polymer Solar Cells

Wang,

Feng,

Liu

et al. 2024

Macromol. Rapid Commun.

View full text Add to dashboard Cite

show abstract

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Non-fused core-linked star-shaped oligomer acceptors for stable binary organic solar cells with over 19% efficiency

Abstract: Star-shaped oligomer acceptor represents a promising candidate to high-performance and robust organic solar cells (OSCs). However, the limited diversity of this community acceptors leaves a significant knowledge gap regarding their...

Cited by 1 publication

References 59 publications

New Polymeric Acceptors Based on Benzo[1,2‐b:4,5‐b′] Difuran Moiety for Efficient All‐Polymer Solar Cells

New Polymeric Acceptors Based on Benzo[1,2‐b:4,5‐b′] Difuran Moiety for Efficient All‐Polymer Solar Cells

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