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Synthesis of Naphthalenediimide-Based Co-Polymers for n-Channel Organic Field-Effect Transistors

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Two copolymers containing alternating electron-donating and electron-accepting units, based on naphthalene diimide and bithiophene vinylene bithiophene with different pendant groups, i.e., C24 (P(NDI-T2VT2)-24) and C28 (P(NDI-T2VT2)-28) are synthesized via Stille-coupling polymerization reaction to study the effect of length of the alkyl side chain on the performance of n-type organic field-effect transistors (OFETs). The thermal stability, optical absorption, thin-film crystallinity, and electronic properties of the OFETs with the copolymers are investigated. Both polymers showed reliable n-type transistor characteristics with electron mobility of 0.015 cm2/Vs (C24) and 0.019 cm2/Vs (C28) with a standard deviation of 0.01 from 36 devices. Furthermore, (P(NDI-T2VT2))-C28 OFETs showed slightly better device mobility than C24 because of their better solubility and crystallinity. Mobilities up to 0.019 cm2/Vs are recorded for (P(NDI-T2VT2))-C28 are analyzed.
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Document Type: Research Article

Publication date: November 1, 2017

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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