Synthesis,characterization, and organic field‐effect transistors study of conjugated D–A copolymers based on dialkylated naphtho[1,2‐b:5,6‐b′]dithiophene/naphtho[1,2‐b:5,6‐b′]difuran and benzodiathiazole/benzoxadiazole |
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Authors: | Song Chen Rui Qu Liwei Wang Meng Wang Gui Yu Xiaoyu Li Haiqiao Wang |
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Affiliation: | 1. China Textile Academy, , Beijing, 100025 China;2. State Key Laboratory of Organic‐Inorganic Composite, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, , Beijing, 100029 China;3. Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, , Beijing, 100190 China;4. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, , Beijing, 100029 China |
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Abstract: | In this report, four donor–acceptor copolymers, P(NDT3‐BT), P(NDT3‐BO), P(NDF3‐BT), and P(NDF3‐BO), using 5,10‐didodecyl‐naphtho[1,2‐b:5,6‐b′]dithiophene (NDT3) or 5,10‐didodecyl‐naphtho[1,2‐b:5,6‐b′]difuran (NDF3) as an electron‐rich unit and benzodiathiazole (BT) or benzoxadiazole (BO) as an electron‐deficient one, were designed, synthesized, and characterized. Detailed systematical investigation was developed for studying the effect of the S/O atoms on the optical, electrochemical, and morphological properties of the polymers, as well as the subsequent performance of the organic field‐effect transistors (OFETs) fabricated from these copolymers. It was found that, compared with NDF3‐based P(NDF3‐BT)/P(NDF3‐BO), by replacing NDF3 with stronger aromatic NDT3, the resultant P(NDT3‐BT)/P(NDT3‐BO) show smaller lamellar distance with an increased surface roughness in solid state, and relatively higher hole mobilities are obtained. The hole mobilities of the four polymers based on OFETs varied from 0.20 to 0.32 cm2 V?1 s?1 depending on their molecular structures, giving some valuable insights for the further design and development of a new generation of semiconducting materials. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52, 2465–2476 |
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Keywords: | benzodiathiazole/benzoxadiazole conjugated polymers high performance polymers naphthodichalcogenophenes organic field-effect transistors synthesis |
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