Manipulating Molecular Stacking to Achieve High Electron Mobility in 2D Conjugated Ultra-Narrow Bandgap Non-Fullerene Acceptors with Absorption Beyond 1000 nm

Liao, Xunfan1; Liu, Mingtao1; Xie, Wenchao1; Wang, Junwei2; Zhu, Peipei1; Yu, Shicheng3; Fu, Yuang4; Lu, Xinhui4; Feng, Kui2; Guo, Xugang2; Chen, Yiwang1

2024-06-01

10.1002/adfm.202405728

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

["N-type organic semiconductors are essential for the advancement of organic electronic devices. However, in relation to extensive research on n-type and p-type polymers, studies on high-mobility n-type small-molecule semiconductors (SMSCs) are limited. Here, a series of ultra-narrow bandgap n-type SMSCs are developed on an A-D-A-type structure. These SMSCs feature an exceptionally large pi-conjugated area, leading to strong intramolecular charge transfer and robust pi-pi interactions. For the first time, central core and terminal halogenation are employed to control molecular surface electrostatic potential distribution, thereby regulating the pi-pi stacking area (S pi-pi) and studying their correlation. The research reveals that, in n-type SMSCs with an edge-on arrangement, introducing fluorine into the 2D central core can reduce the S pi-pi, which is detrimental to the electron mobility (mu e) of organic field-effect transistors (OFETs). Conversely, terminal chlorination facilitates electron injection and improves mu e. Consequently, DTPC-OD-4Cl, featuring shorter alkyl side chains and a non-fluorinated 2D central core and undergoing terminal chlorination, achieved the highest mu e of up to 0.52 cm2 V-1 s-1, ranking among the highest values reported for A-D-A type SMSCs. This work not only systematically investigated the influence of molecular structure on mobility but also provided novel insights for designing more efficient n-type SMSCs.","A series of DTPC-based A-D-A-type small molecules featuring super-large pi-conjugation area are developed, exhibiting n-type transport properties. Central core non-fluorinated molecules exhibited stronger pi-pi stacking, achieving superior electron mobility of 0.52 cm2 V-1 s-1 in an OFET device. This work demonstrates that expanding the pi-conjugated area and regulating electrostatic interactions hold great potential for developing high-performance n-type organic semiconductors. image"]

high electron mobility n-type small-molecule semiconductors organic field-effect transistors 2D conjugation pi-pi stacking area

SCI ; EI

英语

通讯

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

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001250311300001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

Web of Science

1.Jiangxi Normal Univ, Coll Chem & Chem Engn, Key Lab Fluorine & Silicon Energy Mat & Chem, Minist Educ, 99 Ziyang Ave, Nanchang 330022, Peoples R China
2.Southern Univ Sci & Technol SUSTech, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Forschungszentrum Julich, Inst Energie & Klimaforsch IEK 9 Grundlagen Elektr, D-52425 Julich, Germany
4.Chinese Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China

Liao, Xunfan,Liu, Mingtao,Xie, Wenchao,et al. Manipulating Molecular Stacking to Achieve High Electron Mobility in 2D Conjugated Ultra-Narrow Bandgap Non-Fullerene Acceptors with Absorption Beyond 1000 nm[J]. ADVANCED FUNCTIONAL MATERIALS,2024.

Liao, Xunfan.,Liu, Mingtao.,Xie, Wenchao.,Wang, Junwei.,Zhu, Peipei.,...&Chen, Yiwang.(2024).Manipulating Molecular Stacking to Achieve High Electron Mobility in 2D Conjugated Ultra-Narrow Bandgap Non-Fullerene Acceptors with Absorption Beyond 1000 nm.ADVANCED FUNCTIONAL MATERIALS.

Liao, Xunfan,et al."Manipulating Molecular Stacking to Achieve High Electron Mobility in 2D Conjugated Ultra-Narrow Bandgap Non-Fullerene Acceptors with Absorption Beyond 1000 nm".ADVANCED FUNCTIONAL MATERIALS (2024).