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dc.contributor.authorKim, Hye Kyung
dc.date.accessioned2018-08-20T15:36:57Z
dc.date.available2018-08-20T15:36:57Z
dc.date.created2018-08
dc.date.issued2018-07-31
dc.date.submittedAugust 2018
dc.identifier.urihttp://hdl.handle.net/1853/60270
dc.description.abstractEnergy level alignment at metal/organic interfaces plays a critical role in charge transport across the interfaces within organic and optoelectronic devices. To control the barriers to injection/collection, dipolar surface modifiers can be introduced at the interface to tune the work- function of the electrode material. This results in a shift of the frontier molecular orbitals of the organic semiconductor upon contact with the modified-electrode. An appropriate shift in one direction facilitates electron transport and the opposite direction hole transport. In this work, new small molecule surface modifiers were synthesized and deposited on electrode materials, namely indium tin oxide (ITO) and gold to reduce their work-functions to be potential candidates for low work-function electron selective electrodes. Amines – N-oxide and N-heterocyclic carbenes, in addition to chalcogens – phosphine sulfide phosphines and N-heterocyclic thiones and selones were investigated for their work-function reducing capabilities and surface coverage. All the materials successfully reduced the work-function of the modified electrodes, with the magnitude of the shift dependent, to a degree, on the thickness of the deposited film.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technology
dc.subjectWork function
dc.subjectSurface modifiers
dc.subjectElectrode
dc.titleWork function tuning of electrode materials with small molecule surface modifiers
dc.typeDissertation
dc.description.degreePh.D.
dc.contributor.departmentChemistry and Biochemistry
thesis.degree.levelDoctoral
dc.contributor.committeeMemberReichmanis, Elsa
dc.contributor.committeeMemberReynolds, John
dc.contributor.committeeMemberKippelen, Bernard
dc.date.updated2018-08-20T15:36:57Z


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