Abstract
High carrier mobility and uniform device performance are of crucial importance for organic field-effect transistor (OFET)-based device and integrated circuit applications. However, strategies for achieving high device performance with small variations from batch to batch are still desired. Here, we report a thin liquid crystal-like film of 2,8-difluoro-5,11-bis(triethylsilylethynyl) anthradithiophene (dif-TES-ADT) grown on a N,N′-ditridecylperylene-3,4,9,10-tetra-carboxylic diimide (PTCDI-C13) template, confirmed by atomic force microscopy and polarized fluorescence microscopy. The liquid crystal-like films with large crystalline domains are further employed as carrier transport channels for OFETs. As a result, we achieved high-performance OFETs with a saturation carrier mobility of 1.62 ± 0.26 cm2 V−1 s−1 and a small variation of 16% among three batches. This finding provides a new strategy to design materials and device structures to simultaneously achieve high carrier mobility and device uniformity.
摘要
高载流子迁移率和器件性能的一致性对于有机场效应晶体管在阵列和集成电路上的应用至关重要. 然而, 同时具备高性能和小批间差的方法当前仍然是个挑战. 本论文在原子力显微镜和偏振荧光显微镜表征的基础上, 报道了在PTCDI-C13分子模板上生长具有大晶畴的dif-TES-ADT类液晶状薄膜的方法. 我们进一步将所获得的薄膜用作有机场效应晶体管的载流子传输通道, 其饱和载流子迁移率高达1.62 ± 0.26 cm2 V−1 s−1. 更重要的是, 在重复三个批次之间, 每次50个器件的迁移率批间差仅为16%. 这一发现为设计材料和器件结构以同时实现高载流子迁移率和器件均匀性提供了一种新思路.
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Acknowledgements
The authors are grateful to the financial support from the National Natural Science Foundation of China (51821002), the Collaborative Innovation Center of Suzhou Nano Science & Technology, the Deutsche Forschungsgemeinschaft (SFB 858 projects B3, the German-Chinese Transregional Collaborative Research Centre TRR 61/PAK 943), the Europäischer Fonds für regionale Entwicklung (EFRE) innovation laboratory for high performance materials (JLU) and the National Key Research and Development Program of China (2018YFE0200700).
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Open Access funding enabled and organized by Projekt DEAL.
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Authors and Affiliations
Contributions
Wang W, Wang Z and Chi L conceived and supervised the work. Wang ZF performed the film deposition and characterization, and OFET fabrication and characterization. Martin-Jimenez D performed the peel-off AFM measurements and data analysis. Zhang Y, Wiche M, Liu L, Ebeling D, Zhong Q, Fontein F, Schirmeisen A and Huang L assisted in the experiments. Chi L, Wang W and Wang ZF wrote the manuscript.
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Zhifang Wang is currently a joint PhD student of Soochow University (Institute of Functional Nano & Soft Materials (FUNSOM)) and Westfälische Wilhelms-Universität Münster (Physikalisches Institut). Her research interest focuses on the growth of ultra-thin low-dimensional organic crystals and the interface engineering in OFETs.
Daniel Martin-Jimenez received his PhD degree from the Universidad Autonoma de Madrid Facultad de Ciencias: Madrid, Madrid, ES in 2017. He is now a postdoctoral researcher at the Institute of Applied Physics (IAP) and Center for Materials Research (LaMa), Justus Liebig University Gießen. His research interests include on-surface reaction, multifrequency AFM and solid-liquid interface.
Zi Wang received his PhD degree from Changchun Institute of Applied Chemistry, Chinese Academy of Sciences in 2014. He started his post-doc research on sensors and detectors based on organic films in Prof. Lifeng Chi’s group at Soochow University. From 2017 to 2018, he worked at the University of Groningen as a post-doc researcher. Currently, he is a research scientist at Gusu Laboratory of Materials. Now his research interest is materials genome technology for functional films.
Wenchong Wang received his PhD degree from the Institute of Physics, Chinese Academy of Sciences, China, in 2003, working on molecular beam epitaxy. He was a research scientist at Madrid Microelectronics Institute, National Centre for Microelectronics, Spain. He is presently a senior research fellow at the Institute of Physics, Münster University, and CeNTech, Germany. His research mainly focuses on the growth of functional materials and their applications in electronics.
Lifeng Chi received her BSc degree in physics and MSc degree in physical chemistry from Jilin University. She earned her PhD degree in 1989 at the Max Planck Institute for Biophysical Chemistry, Goettingen, Germany. She became a professor in physics at the University of Münster in 2004 and was appointed as chair professor at Soochow University in 2012. Her works mainly focus on on-surface reactions, self-assembling on patterned surfaces and the application in electronics.
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Wang, Z., Martin-Jimenez, D., Zhang, Y. et al. Liquid crystal-like active layer for high-performance organic field-effect transistors. Sci. China Mater. 66, 1518–1526 (2023). https://doi.org/10.1007/s40843-022-2273-3
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DOI: https://doi.org/10.1007/s40843-022-2273-3