Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/22021
Title: Electrical Switching and Memory Effects in Electroactive Polymers Containing Electron-Donor and -Acceptor Moieties
Authors: LIU YILIANG
Keywords: Polymer Electronic Memory; Charge Transfer; Polyimide; Polyfluorene; Azobenzene Polymer; Graphene
Issue Date: 19-Aug-2010
Source: LIU YILIANG (2010-08-19). Electrical Switching and Memory Effects in Electroactive Polymers Containing Electron-Donor and -Acceptor Moieties. ScholarBank@NUS Repository.
Abstract: Electroactive polymers have been of interest as alternatives to traditional inorganic semiconductor materials for application in electronic memory devices. In comparison to silicon-based memory devices, polymer electronic memories exhibit low-cost potential, simplicity in structure, good scalability, 3D stacking capability, and ease of processing. A series of electroactive polymers, including functional polyimides, polyfluorene copolymers, azobenzene-containing polymers and graphene oxide (GO)-polymer complexes, which contains electron-donor and -acceptor moieties within a single macromolecule, have been designed in this work. Electrical switching and memory effects of these polymers have been studied in terms of their current density-voltage (J-V) characteristics under electrical sweeps. The memory effects, including magnitudes of the ON and OFF state currents, volatility and reversibility of the ON state, and switching threshold voltages, are dependant to a large extent on the molecular structures. The effects of different functional groups (electron-donor or -acceptor moieties) on the resultant memory effects have been studied with the aid of molecular simulation and experimental characterization. The molecular structure-dependent switching and memory effects illustrate that it is possible to tune the electrical switching and memory behaviors of polymers via molecular design and synthesis.
URI: http://scholarbank.nus.edu.sg/handle/10635/22021
Appears in Collections:Ph.D Theses (Open)

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