Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/17344
Title: New materials for organic semiconductors and organic dielectries: Synthesis, characterization and theoretical studies
Authors: CHE HUIJUAN
Keywords: Organic electronics, molecular electronics, large-area molecular junctions, molecular rectifier, push-pull molecules, BCB organic dielectrics
Issue Date: 22-Sep-2009
Source: CHE HUIJUAN (2009-09-22). New materials for organic semiconductors and organic dielectries: Synthesis, characterization and theoretical studies. ScholarBank@NUS Repository.
Abstract: Organic semiconductors and organic dielectrics differ from their inorganic counterparts in many ways including optical, electronic, chemical and structural properties. In particular, their electronic properties have aroused much excitement among scientists. We have prepared robust large-area molecular rectifier junctions from two series of ¿push-pull¿ molecules using Au/ donor-acceptor self-assembled monolayers/PEDT/Al sandwich device configuration. These devices show obvious asymmetric effects under applied bias. The IV characteristics follow closely the prediction of Simmon¿s tunneling theory. The electron conduction parameters and charge transport mechanism were investigated. We have attempted to prepare methyl substituted benzocyclobutenes (BCB) monomer. We anticipate that the electron-donating substituents on the four-member ring of BCB will lower the polymerization temperature so as to satisfy its properties as dielectric materials in OFET application. Three synthetic approaches were attempted. The pyrolytic synthesis process was carried out on our improved pyrolysis apparatus and the results were rationalized based on DFT theoretical calculations.
URI: http://scholarbank.nus.edu.sg/handle/10635/17344
Appears in Collections:Ph.D Theses (Open)

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