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

作　　者：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 

机构地区：[1]Laboratory of Molecular Materials and Devices,Department of Materials Science,Fudan University,Shanghai 200433,People’s Republic of China [2]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,People’s Republic of China [3]Shanghai Frontiers Science Research Base of Intelligent Optoelectronic and Perception,Institute of Optoelectronic and Department of Material Science,Fudan University,Shanghai 200433,People’s Republic of China

出　　处：《Advanced Fiber Materials》2023年第6期2069-2079,共11页先进纤维材料（英文）

基　　金：the National Natural Science Foundation of China(Grant No.61890940,51903051);the Natural Science Foundation of Shanghai(Grant 22ZR1407800).

摘　　要：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 cm^(2)V^(−1)s^(-1)and an average mobility of approximately 7.8 cm^(2)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.

关 键 词：Semiconducting polymer fibers Organic field-effect transistors Template-assisted self-assembly PHOTORESPONSE Crystalline polymer 

分 类 号：TQ317[化学工程—高聚物工业]