Template-Assisted Fabrication of Single-Crystal-Like Polymer Fibers for Efficient Charge Transport

Zeng Wu; Yangjiang Wu; Longfei Yang; Xiaochan Zuo; Zhihui Wang; Yongkun Yan; Wenhao Li; Dongdong Chang; Yunlong Guo; Xiaoliang Mo; Xuefeng Lu; Yunqi Liu; Yan Zhao

doi:10.1007/s42765-023-00326-z

Advanced Fiber Materials ›› 2023, Vol. 5 ›› Issue (6) : 2069 -2079. DOI: 10.1007/s42765-023-00326-z

Research Article

Template-Assisted Fabrication of Single-Crystal-Like Polymer Fibers for Efficient Charge Transport

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¹Laboratory of Molecular Materials and Devices, Department of Materials Science, Fudan University, 200433, Shanghai, People’s Republic of China

²Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids,, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, People’s Republic of China

³Shanghai Frontiers Science Research Base of Intelligent Optoelectronic and Perception, Institute of Optoelectronic and Department of Material Science, Fudan University, 200433, Shanghai, People’s Republic of China

^p zhaoy@fudan.edu.cn

Zeng Wu

is a PhD candidate of Materials Science at the Department of Materials Science, Fudan University. He received his BS degree in Materials Chemistry from Fudan University in 2019. His research interests are the solution-processing technology of organic semiconductors and aggregation structures of polymers.

Yangjiang Wu

received his BS degree in Physics from Northeastern University (China) in 2010 and a PhD degree in Condensed Matter Physics from Soochow University in 2015. He is now a Postdoctoral Researcher at the Department of Materials Science, Fudan University. His research interests include interfacial effects and functional utilizations of organic field-effect transistors.

Longfei Yang

received his PhD degree from the Department of Materials Science, Fudan University, China. He received his BS degree from YanTai University, and MSc degree from Shanghai University. His research interests include organic field-effect transistors and polymer aggregate structure.

Xiaochan Zuo

received her BEng degree from Hainan University in 2022. She is now a MEng candidate in Materials and Chemical Engineering at Fudan University. Her research focuses on the preparation and application of organic semiconductor optoelectronic devices.

Zhihui Wang

received her BS degree and PhD degree from East China University of Science and Technology. She is now a Postdoctoral Researcher at the Department of Materials Science, Fudan University. Her research interests include polymer condensed matter and flexible electronics.

Yongkun Yan

is a PhD candidate at the Department of Materials Science, Fudan University, China. He received his BS degree from Fudan University in 2014 and MSc degree from Technische Universität Dresden in 2017. His research interests are solution-processed organic field-effect transistors and organic circuits.

Wenhao Li

is a PhD candidate at the Department of Materials Science, Fudan University, China. He received his BEng degree from Zhengzhou University in 2020 and MEng degree from Fudan University in 2022. His research interests are the preparation and properties of high-performance organic field-effect transistors.

Dongdong Chang

received his PhD degree from East China University of Science and Technology. He is now a Postdoctoral Researcher at the Department of Materials Science, Fudan University. His research interests include design and synthesis of organic semiconducting polymers and π-conjugated systems.

Yunlong Guo

received his PhD degree in Physical Chemistry from the Institute of Chemistry, Chinese Academy of Sciences (ICCAS) in 2010. He is now a professor at ICCAS. His research interests include organic–inorganic hybrid perovskite electronics and functional organic field-effect transistors.

Xiaoliang Mo

received his BS and PhD degrees in physical electronics from the Department of Materials Science, Fudan University in 1996 and 2002, respectively. He is now an associate professor at the Institute of Optoelectronics, Fudan University. His research focuses on optoelectrical devices, such as solar cells, EL devices, and sensors.

Xuefeng Lu

obtained his PhD degree from Fudan University in 2015. He then completed his postdoctoral study from the National University of Singapore (NUS) and The Hong Kong University of Science and Technology (HKUST). Presently, he is a professor at Fudan University. His research interests primarily focus on novel π-conjugated systems and their applications.

Yunqi Liu

graduated in 1975 from the Department of Chemistry, Nanjing University, and received a doctorate from Tokyo Institute of Technology, Japan, in 1991. Presently, he is a professor at the Institute of Chemistry, CAS. He is also a professor at the Department of Materials Sciences, Fudan University. His research interests include molecular materials and devices.

Yan Zhao

received his BS degree in Chemistry from Shandong University in 2008 and a PhD degree in Physical Chemistry from the Institute of Chemistry, Chinese Academy of Sciences (ICCAS) in 2014. He is now an associate professor at the Department of Materials Sciences, Fudan University. His research focuses on the processing of organic/polymer semi-conductors for field-effect transistors, organic circuits, and organic sensors.

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Abstract

Polymer semiconductors with highly crystalline forms, such as crystalline nanowires and fibers, are critical for charge carrier transport in organic field-effect transistors (OFET). However, the highly crystalline form usually requires high-quality molecular orderliness, which still remains a great challenge, especially in single fibers of extremely high-molecular-weight semiconducting polymers. In this study, we present an anodic aluminum oxide (AAO) template-assisted method to fabricate highly crystalline N-alkyl diketopyrrolopyrrole dithienylthieno[3,2-b]thiophene (DPP-DTT) single fibers. Grazing-incidence X-ray diffraction and selected area electron diffraction show obvious diffraction patterns for single-crystal-like characteristics, indicating the highly ordered molecular chains and highly crystalline structures of the single DPP-DTT fibers. OFET based on the single-crystal-like DPP-DTT fiber exhibits the highest charge carrier mobility of up to 14.2 cm² V⁻¹ s⁻¹ and an average mobility of approximately 7.8 cm² V⁻¹ s⁻¹, which is significantly improved compared with DPP-DTT thin film-based devices. Besides, the fiber-based OFET also exhibit a high light responsivity of 4.0 × 10³ A W⁻¹. This work demonstrates a facile and effective method for fabricating single-crystal-like fibers of high-molecular-weight polymer semiconductors and corresponding high-performance OFET devices. Furthermore, it also expands application of AAO template method for achieving crystalline semiconducting polymer fibers and provide a new perspective for the study on polymer crystallization.

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Zeng Wu, Yangjiang Wu, Longfei Yang, Xiaochan Zuo, Zhihui Wang, Yongkun Yan, Wenhao Li, Dongdong Chang, Yunlong Guo, Xiaoliang Mo, Xuefeng Lu, Yunqi Liu, Yan Zhao. Template-Assisted Fabrication of Single-Crystal-Like Polymer Fibers for Efficient Charge Transport. Advanced Fiber Materials, 2023, 5(6): 2069-2079 DOI:10.1007/s42765-023-00326-z