Regulating Molecular Structure of S,N-Heteroacene Non-fullerene Acceptors to Achieve Efficient Photoelectric Properties

Liu, Mingtao1; Zhu, Peipei1; Lai, Shiting1; Zhang, Xiage2; Fu, Yuang3; Xue, Ling1; Liu, Dan1; Feng, Kui2; Lu, Xinhui3; Guo, Xugang2; Liao, Xunfan1; Chen, Yiwang1

2024-09-01

10.1002/cjoc.202400699

CHINESE JOURNAL OF CHEMISTRY   影响因子和分区

1001-604X

1614-7065

The ternary strategy has demonstrated its efficacy in improving charge transport in organic solar cells (OSCs). Here, three novel non-fullerene acceptors, SN6C9-4F, SN6C9-4Cl and SN6C10-4F, based on S,N-heteroacene linear backbone were designed and synthesized. The three acceptors exhibit excellent molecular coplanarity, high crystallinity and possess a deep-lying lowest unoccupied molecular orbital energy level, which is beneficial for charge transport and injection in organic field-effect transistors (OFETs). Notably, the OFET devices based on all three acceptors achieved impressive electron mobilities, with SN6C10-4F achieving up to 0.73 cm(2)V-1s(-1), which is one of the highest values among A-D-A type small molecules. In addition, the OSCs device based on PBDB-T:SN6C9-4F exhibited the best power conversion efficiency of 12.07% owing to its optimal morphology and enhanced charge transport. Moreover, the incorporation of SN6C9-4F into the efficient PM6:L8-BO binary system to form ternary OSCs resulted in extended absorption range, enhanced donor crystallization, improved and more balanced charge transport, ultimately leading to an improvement of PCE from 17.78% to 18.32%. This study highlights the potential of developing acceptors with distinct structures from Y-series acceptors to broaden absorption and regulate donor crystallization, providing a novel approach to enhance the PCE of OSCs.

S,N-Heteroacene Optoelectronic devices High electron mobility Ternary strategy Regulate crystallinity

SCI

英语

其他

National Natural Science Foundation of China (NSFC)["52333006","51973032","21905043","22275078","52173171"] ; Jiangxi Provincial Natural Science Foundation["20212ACB203005","20224ACB214002"] ; Thousand Talents Plan of Jiangxi Province[jxsq2019101051] ; Research Grants Council (RGC) of Hong Kong[14303519]

Chemistry

Chemistry, Multidisciplinary

WOS:001313043100001

WILEY-V C H VERLAG GMBH

Web of Science

1.Jiangxi Normal Univ, Coll Chem & Mat, Key Lab Fluorine & Silicon Energy Mat & Chem, Minist Educ, 99 Ziyang Ave, Nanchang 330022, Jiangxi, Peoples R China
2.Southern Univ Sci & Technol SUSTech, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Chinese Univ Hong Kong, Dept Phys, Kowloon, Hong Kong 999077, Peoples R China

Liu, Mingtao,Zhu, Peipei,Lai, Shiting,et al. Regulating Molecular Structure of S,N-Heteroacene Non-fullerene Acceptors to Achieve Efficient Photoelectric Properties[J]. CHINESE JOURNAL OF CHEMISTRY,2024.

Liu, Mingtao.,Zhu, Peipei.,Lai, Shiting.,Zhang, Xiage.,Fu, Yuang.,...&Chen, Yiwang.(2024).Regulating Molecular Structure of S,N-Heteroacene Non-fullerene Acceptors to Achieve Efficient Photoelectric Properties.CHINESE JOURNAL OF CHEMISTRY.

Liu, Mingtao,et al."Regulating Molecular Structure of S,N-Heteroacene Non-fullerene Acceptors to Achieve Efficient Photoelectric Properties".CHINESE JOURNAL OF CHEMISTRY (2024).