Flexible polymer memory devices derived from triphenylamine-pyrene containing donor-acceptor polyimides

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题名:	Flexible polymer memory devices derived from triphenylamine-pyrene containing donor-acceptor polyimides
作者:	劉振良;Yu, An-Dih;Kurosawa, Tadanori;Lai, Yi-Cang;Higashihara, Tomoya;Ueda, Mitsuru;Liu, Cheng-Liang;Chen, Wen-Chang
贡献者:	工學院化學工程與材料工程學系
日期:	2012-10-14
上传时间:	2026-04-21 14:00:33 (UTC+8)
出版者:	Royal Society of Chemistry
摘要:	摘要： Organic polymer based electrical memory devices have attracted significant scientific interest for flexible electronics. However, molecular design principles of polymers with specified memory characteristics on flexible substrates remain challenges. Herein we developed new triphenylamine-pyrene containing donor-acceptor polyimides (PIs) on flexible poly(ethylene naphthalate) (PEN)/Al/PIs/Al cross-point devices, which showed the memory characteristics changing from volatile to nonvolatile via the relative copolymer ratio. The PIs were prepared from the diamines 4,4-diamino-4-methyltriphenylamine ( AMTPA ) or N , N -bis(4-aminophenyl)aminopyrene ( APAP ) and the dianhydride 4,4-(hexafluoroisopropylidene)diphthalic anhydride ( 6FDA ), with relative AMTPA/APAP molar compositions of 100/0, 95/5, 90/10 and 0/100. As the APAP content increased, the memory device characteristics changed from volatile to nonvolatile behavior of flash and write once read many (WORM), since the pyrene moiety could stabilize the radical cation of the APAP moieties. The threshold voltage, ON/OFF ratio, and retention ability were within 3 V, more than 10 4 , and 10 4 s, respectively. Additionally, the endurance and bending cyclic measurements confirmed that the flexible PI memory devices exhibited excellent reliability and mechanical stability. A possible switching mechanism based on the charge transfer interaction was proposed through molecular simulation and fitted with physical conduction models in OFF and ON states. The manipulation of the memory volatility through tailoring the molecular design and plastic electronic devices demonstrated promising applications of donor-acceptor PIs in integrated memory devices. Flexible donor-acceptor copolyimide memory devices are prepared from strategic combinations of triphenylamine and pyrene moieties for tunable memory characteristics from volatile to nonvolatile flash and write-once-read-many times (WORM). 出版日期： 2012-09-11 資源來源： Alma/SFX Local Collection 識別號： ISSN: 0959-9428 識別號： EISSN: 1364-5501 識別號： DOI: 10.1039/c2jm33852a
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