Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Conjugated oligomers"”.
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Electronic excitations in branched conjugated oligomers: A quasiparticle view and tight-binding models
… excited state electronic structures of organic conjugated molecules. The exciton scattering (ES) approach has been extended for efficient calculation of optical spectra of large branched conjugated oligomers. The methodology of tight-binding (lattice) model, originally developed in condensed …
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Single molecule studies of molecular electronics and biohybrid materials
… Molecular charge transport is studied using conjugated oligomers with oxazole anchors, focusing on the role of the heteroatom substitution position in terminal oxazole groups. These results reveal QI effects in oxazole-terminated phenylene molecular junctions, including destructive QI in …
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Optical spectroscopy of conjugated polymers.
… studies of the optical properties of two model conjugated systems (poly-(p-phenylenevinylene) and a set of zinc-centred oligo-(porphyrins) ). Various optical probing techniques have been employed to study the nature and behaviour of the primary photoexcited state of poly-(p-phenylenevinylene) …
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Characterisation of molecular materials for electronic devices
Characterisation of thin films of conjugated oligomers deposited by thermal evaporation and pulsed laser ablation has been carried out through measurements of the optical absorption, dark conductivity and photoconductivity of samples with coplanar and sandwich geometries. The dark conductivity was …
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Thiophene Based Semiconductors: Synthesis and Characterizations
… originate neither from the twist of the conjugated system nor from the crystalline disorder, but rather from low-dense crystalline packing and "wrong" molecular orientation. To overcome these obstacles two thiophene-based azomethines were designed to optimize a solubility, …
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Linear Conjugated Molecular Wires: Organic Materials and Single-Molecule Electronics
… families are made up of collections of linear conjugated oligomers, such as oligoenes and phenylenevinylenes and their derivatives. The bulk properties of each system were examined in order to establish structure-performance relationship between the intrinsic molecular properties of the …
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Understanding the Structure-Property Relationship in Diketopyrrolopyrroles for Organic Electronics
… of chain length, encapsulation and asymmetry of conjugated DPP-based polymers and small molecules were investigated. The first part of this thesis explored how chain length can affect the optical properties of conjugated DPP-based materials. Previously in our group, a series of thienyl-DPP …