Graduate Thesis Or Dissertation

 

Electronic and Optical Properties of Organic Semiconductors : Experiment and Simulation Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/bc386n09z

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  • The continued development of organic semiconductor materials relies on an understanding of the relationship between optoelectronic properties, molecular structure, and molecular interaction. Several detailed studies of electronic properties in functionalized polyacene materials are presented. A computational model which allows the extraction of charge generation and transport properties from experimental data is developed. Ultrafast charge generation is observed, and the dependence of transient photocurrent data on this charge generation is determined. Greater crystallinitity of the donor leads to more efficient ultrafast charge generation, improving device performance. Voltage and incident intensity dependence data is fit using a single parameter set, allowing for the testing of multiple theoretical models against each other. The effect of acceptor addition to the donor material is investigated. Different acceptors allow for the isolation of effects due to packing and electronic structure interactions with the donor. New sources for organic materials to test are important to the future of the field. One novel source for organic small molecules is the secretions of wood-eating fungi. Optical and electronic characterisation is performed on xylindein, a fungally-derived molecule, as an example of the interesting properties and challenges which this source of material present.
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  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2015-08-12T18:16:28Z (GMT) No. of bitstreams: 2 license_rdf: 1527 bytes, checksum: d4743a92da3ca4b8c256fdf0d7f7680f (MD5) JohnsonBrianH2015.pdf: 3033905 bytes, checksum: 47fa265968e9a36f49c69736afc3d34b (MD5)
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  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2015-08-13T15:48:07Z (GMT) No. of bitstreams: 2 license_rdf: 1527 bytes, checksum: d4743a92da3ca4b8c256fdf0d7f7680f (MD5) JohnsonBrianH2015.pdf: 3033905 bytes, checksum: 47fa265968e9a36f49c69736afc3d34b (MD5)

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