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dc.contributor.authorHuang, Chunen_US
dc.date.accessioned2012-02-17T19:18:30Z
dc.date.available2012-02-17T19:18:30Z
dc.date.issued2010-08-25en_US
dc.identifier.urihttp://hdl.handle.net/1853/42755
dc.descriptionThesis advisor has approved the addition of errata to this item. Corrections were made to pages 95, 98 and 101.en_US
dc.description.abstractThis thesis described the synthesis and characterization of new perylene diimide (PDI)-based photonic and electronic materials. In the first part of this thesis, PDI-based polynorbornenes, including PDI-grafted homopolymers and block-copolymers (BCPs) were synthesized and characterized as alternative acceptors for fullerenes for organic electronics. It was found that the PDIs on the polymer side-chains affect π-π stacking with the neighboring PDIs, which has implications for the use of these materials for organic field-effect transistors (OFETs) and organic photovoltaic devices (OPVs). It should be noted that the performance of solar cell based on these materials was poor, like other similar materials. The major reasons could be the challenge in controlling the molecular alignment of the PDI-based materials, which leads to lower electron mobilities in films compared to devices with fullerene-based acceptors. One PDI-grafted BCP showed better OPV performance compared to the other BCPs and respective homepolymer blends, presumably due to favorable morphology. In the second part of this thesis, photo-induced charge-separation in blends of poly-3-hexyl-thiophene (P3HT) and various PDI derivatives have been studied. Probing of long-lived photo-generated PDI radical anions provided insight on these photo-induced processes and their use for OPVs. In the third part of this thesis, the use of photo-generated PDI radical-anion absorption was shown to be effective for optical limiting of nanosecond laser pulses between 650 - 800 nm. In Chapter 5, an effective approach for two-photon absorption (2PA)-induced optical limiting using donor-PDI dyads through which donors and acceptors can be independently chosen to maximize optical suppression at particular wavelengths has been demonstrated. In Chapter 6, conjugated polymers with PDI pendants and poly(carbazole-alt-2,7-fluorene) main-chains were synthesized for optical limiting using the photo-generated PDI radical anion via PDI aggregate excitation and/or 2PA from the polymer backbones. It was also found that nitro-phenyl group or similar derivatives could be good candidates to incorporate into those donor-conjugated polymers, which have significant overlap between their 2PA band and respective polaron absorptions for 2PA-indced optical limiting.en_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectSynthesisen_US
dc.subjectSolar cellsen_US
dc.subjectPerylene dimideen_US
dc.subjectOrganic electronicsen_US
dc.subjectMorphologyen_US
dc.subjectConjugated materialsen_US
dc.subjectOptical limitingen_US
dc.subject.lcshCharge exchange
dc.subject.lcshPhotovoltaic cells
dc.subject.lcshOrganic compounds
dc.titlePerylene diimide-based materials for organic electronics and optical limiting applicationsen_US
dc.typeDissertationen_US
dc.description.degreePhDen_US
dc.contributor.departmentChemistry and Biochemistryen_US
dc.description.advisorCommittee Chair: Marder, Seth; Committee Member: Bredas, Jean-Luc; Committee Member: Collard, David; Committee Member: Kippelen, Bernard; Committee Member: Tolbert, Larenen_US


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