An Effective Friedel−Crafts Postfunctionalization of Poly(N-vinylcarbazole) to Tune Carrier Transportation of Supramolecular Organic Semiconductors Based on π-Stacked Polymers for Nonvolatile Flash Memory Cell

An Effective Friedel−Crafts Postfunctionalization of Poly(N-vinylcarbazole) to Tune Carrier Transportation of Supramolecular Organic Semiconductors Based on π-Stacked Polymers for Nonvolatile Flash Memory Cell

Poly(N-vinylcarbazole) (PVK) and its derivatives are π-stacked polymers of the most important supramolecular organic semiconductors (SOSs), in which semiconducting features are originated from intra-supramolecular interactions. An effective Friedel−Crafts method has been developed to postfunctionali...

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Veröffentlicht in:Journal of the American Chemical Society 2008-02, Vol.130 (7), p.2120-2121
Hauptverfasser: Xie, Ling-Hai, Ling, Qi-Dan, Hou, Xiao-Ya, Huang, Wei
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container_issue 7
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container_title Journal of the American Chemical Society
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creator Xie, Ling-Hai
Ling, Qi-Dan
Hou, Xiao-Ya
Huang, Wei
description Poly(N-vinylcarbazole) (PVK) and its derivatives are π-stacked polymers of the most important supramolecular organic semiconductors (SOSs), in which semiconducting features are originated from intra-supramolecular interactions. An effective Friedel−Crafts method has been developed to postfunctionalize PVK to a PVK−PF SOS and to tune the fundamental electronic structures and transporting properties of the resulting SOS. Stable nonvolatile flash memory effect from the SOS has been demonstrated in an ITO/PVK−PF/metal sandwich device. The device exhibited an ON/OFF current ratio up to 104, and writing/erasing voltages around +2.2/−2.0 V, respectively. The unique electrical bistability can be attributed to the ordering alignment effect induced by electric field and the hindrance effect arisen from bulky moieties. Thus, PVK-containing complicated 9,9-diarylfluorenes (CDAFs) are promising materials for information storage applications.
doi_str_mv 10.1021/ja076720o
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