Please use this identifier to cite or link to this item: https://doi.org/10.1039/c0jm04344c
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dc.titleElectrical conductivity switching and memory effects in poly(N-vinylcarbazole) derivatives with pendant azobenzene chromophores and terminal electron acceptor moieties
dc.contributor.authorLiu, G.
dc.contributor.authorZhang, B.
dc.contributor.authorChen, Y.
dc.contributor.authorZhu, C.-X.
dc.contributor.authorZeng, L.
dc.contributor.authorSiu-Hung Chan, D.
dc.contributor.authorNeoh, K.-G.
dc.contributor.authorChen, J.
dc.contributor.authorKang, E.-T.
dc.date.accessioned2014-10-07T04:27:07Z
dc.date.available2014-10-07T04:27:07Z
dc.date.issued2011-04-28
dc.identifier.citationLiu, G., Zhang, B., Chen, Y., Zhu, C.-X., Zeng, L., Siu-Hung Chan, D., Neoh, K.-G., Chen, J., Kang, E.-T. (2011-04-28). Electrical conductivity switching and memory effects in poly(N-vinylcarbazole) derivatives with pendant azobenzene chromophores and terminal electron acceptor moieties. Journal of Materials Chemistry 21 (16) : 6027-6033. ScholarBank@NUS Repository. https://doi.org/10.1039/c0jm04344c
dc.identifier.issn09599428
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/82248
dc.description.abstractBistable electrical conductivity switching and non-volatile memory effects were demonstrated in Al/polymer/indium-tin oxide sandwich structure devices, constructed from two poly(N-vinylcarbazole) derivatives with pendant azobenzene chromophores and terminal electron acceptor moieties (-NO2 or -CN). Both polymers (PVK-AZO-NO2 and PVK-AZO-2CN) exhibit write-once read-many-times (WORM) type memory effects, with low switching threshold voltages below -2 V and high ON/OFF current ratios of ∼10 5-106. The observed electrical bistability in both polymers can be attributed to the field-induced charge transfer interaction between carbazole electron donor and terminal electron acceptor (-NO2 or -CN) moieties, and subsequent charge trapping at the intermediate azobenzene chromophores. The proposed switching mechanism is supported by the changes in the UV-visible absorption spectra of the polymer film upon transition from the OFF to the ON state. © 2011 The Royal Society of Chemistry.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1039/c0jm04344c
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1039/c0jm04344c
dc.description.sourcetitleJournal of Materials Chemistry
dc.description.volume21
dc.description.issue16
dc.description.page6027-6033
dc.description.codenJMACE
dc.identifier.isiut000289260000030
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