Print Email Facebook Twitter Opto-Electronic Properties of Conjugated Molecular Wires Title Opto-Electronic Properties of Conjugated Molecular Wires Author Grozema, F.C. Contributor Siebbeles, L.D.A. (promotor) Faculty Interfaculty Reactor Institute Date 2003-06-30 Abstract Conjugated polymers are of considerable current interest because of their semi-conducting and light-emitting properties. These properties, combined with their relatively low cost and good processability as compared to inorganic semiconductors, make them attractive candidates for application in plastic electronic devices. Conjugated polymers are being considered for application as the semi-conducting layer in low-cost field-effect transistors (FETs) for the fabrication of flexible or disposable electronic devices. A second application using the light-emitting properties of conjugated polymers is as an emissive layer in light emitting diodes (LEDs) and large area displays. The third application that is being considered is the use of conjugated polymers as the light absorbing layer in photovoltaic devices. Finally, the fourth possible application is the use of conjugated polymers is as molecular wires in single molecule electronics. All of these applications critically rely on the ability of the conjugated polymers to transport charges. A thorough understanding of the properties of charge carriers and their mobility is therefore of obvious importance. Some of the applications involve electronically excited states of conjugated polymers. In LEDs the lowest singlet excited state is the emissive state, while in photovoltaic devices the excited state is the primarily formed species. Therefore it is also of interest to study the properties of conjugated polymers or oligomers in their electronically excited state. This thesis describes a combined experimental and theoretical study of the opto-electronic properties of isolated conjugated polymers in dilute solution. Measurements of the mobility of charges on isolated conjugated polymer chains in solution are discussed and compared to theoretical calculations. The electronic absorption spectra of charged conjugated oligomers were measured and are compared to calculated spectra obtained from quantum chemical calculations. The excited state polarizabilities of conjugated oligomers were calculated using quantum chemical methods and are compared to earlier measurements. Subject conjugated polymermolcular wirepolaroncharge carrier mobility To reference this document use: http://resolver.tudelft.nl/uuid:d8fd67c9-94d5-4436-bc13-9180ba1f02d3 Publisher Delft University Press ISBN 90-407-2422-9 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2003 F.C. Grozema Files PDF iri_grozema_20030630.pdf 5.05 MB Close viewer /islandora/object/uuid:d8fd67c9-94d5-4436-bc13-9180ba1f02d3/datastream/OBJ/view