Abstract
Evolving flexible electronics requires the development of high-mobility and low-power organic field-effect transistors (OFETs) that are crucial for emerging displays, sensors, and label technologies. Among diverse materials, polymer gate dielectrics and two-dimensional (2D) organic crystals have intrinsic flexibility and natural compatibility with each other for OFETs with high performance; however, their combination lacks non-impurity and non-damage construction strategies. In this study, we developed a desirable OFET system using damage-free transfer of 2D organic single crystal, dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene on a unique polymer dielectric layer, poly(amic acid) (PAA). Benefiting from the unique PAA surface nanostructure and the long-range ordered characteristics of the 2D organic single crystal, the resulting OFETs show remarkable performance with high mobility and low operating voltage of 18.7 cm2 V−1 s−1 and −3 V, respectively. The result indicates that combining polymer gate dielectric with 2D organic single crystal using a high-quality method can produce flexible electronic devices with high performance.
摘要
不断发展的柔性电子产品需要开发兼具高迁移率和低功率的有 机场效应晶体管(OFET), 这对于新兴的显示器、传感器和标签科技都 至关重要. 在众多材料中, 聚合物栅极电介质和二维有机晶体为构建高 性能OFET提供了本征柔性和天然的相容性, 但是, 两者的结合仍然缺 少无杂质、无损伤的构筑策略. 在此, 我们通过一种无损转移技术将二 维有机二萘并[2,3-b:2′,3′-f]噻吩并[3,2-b]噻吩(DNTT)单晶转移到一种 独特的聚合物介电层(聚酰胺酸(PAA))上, 构筑了一个理想的OFET体 系. 得益于PAA表面独特的纳米结构和二维有机单晶的长程有序特性, 所得的OFET器件表现出优异的性能, 包括18.7 cm2 V−1 s−1的最高迁移 率和−3 V的低工作电压. 这些结果说明将聚合物栅极介电层与二维有 机单晶高质量结合是构筑高性能柔性电子器件的理想途径.
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Acknowledgements
This work was financially supported by the National Key R&D Program (2021YFA0717900), the National Natural Science Foundation of China (91833306, 51725304, 51903186, and 62004138), and Beijing National Laboratory for Molecular Sciences (BNLMS202006).
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Yang F and Hu W conceived and supervised this project. Fu B and Ji D performed the material preparation and characterization. Fu B, Liu L, and Yang F performed device characterization. Fu B, Yang F, Sun L, Zhang X, and Hu W wrote the paper. All authors contributed to the general discussion.
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The authors declare that they have no conflict of interest.
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Experimental details and supporting data are available in the online version of the paper.
Beibei Fu is a PhD student under the supervision of Prof. Wenping Hu at the Department of Chemistry, School of Science, Tianjin University, and the Collaborative Innovation Center of Chemical Science and Engineering (Tianjin). Her research interests are organic optoelectronic materials and devices.
Fangxu Yang is an associate professor at the Department of Chemistry, School of Science, Tianjin University. He received his PhD degree from the Institute of Chemistry Chinese Academy of Sciences (ICCAS) in 2016 and then joined Tianjin University as a postdoctoral researcher at the Collaborative Innovation Center of Chemical Science and Engineering (Tianjin). Then, he joined Tianjin University as an associate professor. His research interests focus on molecular semiconductor materials, crystals, and optoelectronic devices.
Wenping Hu is a professor at Tianjin University. He received his PhD degree from ICCAS. Then he joined Osaka University and Stuttgart University as a research fellow of Japan Society for the Promotion of Sciences and an Alexander von Humboldt fellow, respectively. Then he joined ICCAS as a full professor. He moved to Tianjin University in 2013. His research focuses on organic optoelectronics.
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Fu, B., Sun, L., Liu, L. et al. Low-power high-mobility organic single-crystal field-effect transistor. Sci. China Mater. 65, 2779–2785 (2022). https://doi.org/10.1007/s40843-022-2035-y
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DOI: https://doi.org/10.1007/s40843-022-2035-y