journal article·2025-03Open access

Coplanar Dimeric Acceptors with Bathochromic Absorption and Torsion‐Free Backbones through Precise Fluorination Enabling Efficient Organic Photovoltaics with 18.63% Efficiency

Wei Liu, Weiwei Wu, Aleksandr A. Sergeev, Jia Yao, Yuang Fu, Chung Hang Kwok, Ho Ming Ng, Chunliang Li, Xiaojun Li, Sai Ho Pun, Huawei Hu, Xinhui Lu, Kam Sing Wong, Yongfang Li, He Yan, Han Yu

Advanced Science· Volume 12· Issue 10

Abstract

Abstract Giant dimeric acceptors (GDAs), a sub‐type of acceptor materials for organic solar cells (OSCs), have garnered much attention due to the synergistic advantages of their monomeric and polymeric acceptors, forming a well‐defined molecular structure with a giant molecular weight for high efficiency and stability. In this study, for the first time, two new GDAs, DYF‐V and DY2F‐V are designed and synthesized for OSC operation, by connecting one vinylene linker with the mono‐/di‐fluorinated end group on two Y‐series monomers, respectively. After fluorination, both DYF‐V and DY2F‐V exhibit bathochromic absorption and denser packing modes due to the stronger intramolecular charge transfer effect and torsion‐free backbones. Through precise fluorination, the DYF‐V‐based devices exhibit the highest performance of 18.63% among the GDA‐based OSCs, outperforming its non‐fluorinated counterpart, DY‐V‐based ones (16.53%). Theoretical and morphological results demonstrate that proper fluorination in DYF‐V‐based devices strengthens intra/intermolecular interactions for enhanced crystallinity, superior phase segregation, and less energy disorder, which is beneficial for fast exciton dissociation, rapid carrier transport, and suppressed charge recombination. The work demonstrates that proper fluorination on GDAs with rigid coplanar backbones is effective for broader photon harvesting, stronger packing, and robust stability in GDA‐based OSCs.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangdong‐Hong Kong Joint Laboratory for Carbon Neutrality Jiangmen Laboratory of Carbon Science and Technology Jiangmen Guangdong 529199 P. R. China

Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong 999077 P. R. China

Department of Physics William Mong Institute of Nano Science and Technology The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong 999077 P. R. China

Department of Physics Chinese University of Hong Kong Hong Kong New Territories 999077 P. R. China

Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China

Hong Kong University of Science and Technology‐Shenzhen Research Institute No. 9, Yuexing 1st RD, Hi‐tech Park, Nanshan Shenzhen 518057 P. R. China

Hong Kong University of Science and Technology Fok Ying Tung Research Institute S&T Building, Nansha IT Park Guangzhou City 511458 P. R. China

Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

References (56)

Show source-provided references
1. 10.1039/D3EE00272A10.1039/D3EE00272A ↗
2. 10.1002/adma.20210747610.1002/adma.202107476 ↗
3. Zhu C. · Adv. Mater. · 2021 · 33
4. 10.1002/adma.20200717710.1002/adma.202007177 ↗
5. 10.1039/D0EE03490H10.1039/D0EE03490H ↗
6. 10.1021/acs.chemrev.7b0053510.1021/acs.chemrev.7b00535 ↗
7. 10.1038/s41560-018-0181-510.1038/s41560-018-0181-5 ↗
8. 10.1038/nmat506310.1038/nmat5063 ↗
9. 10.1039/C7CS00892A10.1039/C7CS00892A ↗
10. 10.1007/s11426-020-9726-010.1007/s11426-020-9726-0 ↗
11. 10.1021/jacs.4c0150310.1021/jacs.4c01503 ↗
12. 10.1002/adma.20240034210.1002/adma.202400342 ↗
13. 10.1016/j.scib.2020.01.00110.1016/j.scib.2020.01.001 ↗
14. 10.1021/acsenergylett.0c0142110.1021/acsenergylett.0c01421 ↗
15. 10.1002/adfm.20210328310.1002/adfm.202103283 ↗
16. 10.1039/D1EE01062J10.1039/D1EE01062J ↗
17. 10.1002/aenm.20210370210.1002/aenm.202103702 ↗
18. 10.1007/s11426-022-1281-010.1007/s11426-022-1281-0 ↗
19. 10.1038/s41467-021-25638-910.1038/s41467-021-25638-9 ↗
20. 10.1002/adma.20210736110.1002/adma.202107361 ↗
21. 10.1002/adma.20220935010.1002/adma.202209350 ↗
22. 10.1002/anie.20230849610.1002/anie.202308496 ↗
23. 10.1002/anie.20230684710.1002/anie.202306847 ↗
24. 10.1002/anie.20240492110.1002/anie.202404921 ↗
25. 10.1002/anie.20231975510.1002/anie.202319755 ↗
26. 10.1002/anie.20230630310.1002/anie.202306303 ↗
27. 10.1007/s40820-023-01241-z10.1007/s40820-023-01241-z ↗
28. 10.1002/smll.20240279310.1002/smll.202402793 ↗
29. 10.31635/ccschem.023.20220257510.31635/ccschem.023.202202575 ↗
30. 10.1002/adma.20240540410.1002/adma.202405404 ↗
31. 10.1016/j.joule.2024.06.01010.1016/j.joule.2024.06.010 ↗
32. 10.1021/acs.accounts.5b0036310.1021/acs.accounts.5b00363 ↗
33. 10.1002/anie.20220184410.1002/anie.202201844 ↗
34. 10.1002/advs.20220251310.1002/advs.202202513 ↗
35. 10.1002/anie.20230859510.1002/anie.202308595 ↗
36. 10.1002/anie.20231629510.1002/anie.202316295 ↗
37. 10.1016/j.joule.2023.09.00110.1016/j.joule.2023.09.001 ↗
38. 10.1021/acsenergylett.2c0267910.1021/acsenergylett.2c02679 ↗
39. 10.1002/adfm.20210079110.1002/adfm.202100791 ↗
40. 10.1002/adfm.20240013110.1002/adfm.202400131 ↗
41. 10.1039/D2EE03902H10.1039/D2EE03902H ↗
42. 10.1002/adfm.20230071210.1002/adfm.202300712 ↗
43. 10.1002/aenm.20220272910.1002/aenm.202202729 ↗
44. 10.1002/aenm.20200317110.1002/aenm.202003171 ↗
45. 10.1016/j.joule.2021.04.00710.1016/j.joule.2021.04.007 ↗
46. 10.1002/anie.20201628410.1002/anie.202016284 ↗
47. 10.1038/s41467-023-37738-910.1038/s41467-023-37738-9 ↗
48. 10.1021/acs.macromol.3c0163610.1021/acs.macromol.3c01636 ↗
49. 10.1002/anie.20230355110.1002/anie.202303551 ↗
50. 10.1002/aenm.20240028510.1002/aenm.202400285 ↗
51. 10.1002/advs.20220222310.1002/advs.202202223 ↗
52. 10.1002/adma.20240751710.1002/adma.202407517 ↗
53. 10.1002/adma.20220036110.1002/adma.202200361 ↗
54. 10.1021/jacs.0c0489010.1021/jacs.0c04890 ↗
55. 10.1038/s41467-020-17867-110.1038/s41467-020-17867-1 ↗
56. 10.1002/solr.20220016910.1002/solr.202200169 ↗