Layer-by-layer self-assembled semiconductor nanocrystal composites with nonradiative resonance energy transfer for innovative architectural precise color tuning and control

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buir.advisorDemir, Hilmi Volkan
dc.contributor.authorÇiçek, Neslihan
dc.date.accessioned2015-10-12T08:23:51Z
dc.date.available2015-10-12T08:23:51Z
dc.date.copyright2009-08
dc.date.issued2009-08
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionCataloged from PDF version of thesis.en_US
dc.descriptionThesis (M.S.): Bilkent University, The Department of Electrical and Electronics Engineering and the Institute of Engineering and Sciences, 2009.en_US
dc.descriptionIncludes bibliographical references (pages 60-68).en_US
dc.description.abstractIn recent years semiconductor quantum dot nanocrystals (NC) have attracted significant interest and have found numerous important optoelectronic device applications mainly because of their highly tunable optical properties. For example, precisely tuning shades of color chromaticity is critically important in solid state lighting to achieve ultra-efficient, application-specific, spectrallyengineered illumination. To date such color tuning and control of NC emitters have been investigated and demonstrated only based on their composition, shape, and size (using the quantum confinement effect). All of these parameters are, however, limited to be controlled and set during the synthesis process. As a post-synthesis alternative, we proposed and demonstrated the precise and broad control and tuning of color chromaticity by strongly modifying photoluminescence decay kinetics of NC emitters solely based on nonradiative Förster resonance energy transfer (FRET) in layer-by-layer self-assembled NC composite structures. Locating NC emitters in such a layered architecture with a targeted gradient of bandgap in the close proximity (<10 nm) of each other and spatially interspacing them at the nanoscale (with a precision of <1 nm) enabled us to fine-tune and master FRET at a desired efficiency level of nonradiative energy transfer from electronically excited donor NCs to luminescent acceptor iv NCs. These proof-of-concept experimental demonstrations, combined with our numerical modeling and simulation results, proved a highly sensitive tuning capability based on FRET to span a broad color area in Commission Internationale De L’Eclairage (CIE) chromaticity diagram in principle beyond the limits of each of the commonly used LED epitaxial material systems. This innovative architectural tuning opens up a new direction for the photometric engineering of color-conversion LEDs.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityby Neslihan Çiçek.en_US
dc.format.extentxiii, 72 leaves : illustrations.en_US
dc.identifier.itemidB117918
dc.identifier.urihttp://hdl.handle.net/11693/14001
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSemiconductor nanocrystalsen_US
dc.subjectQuantum dotsen_US
dc.subjectNonradiative Förster resonance energy transferen_US
dc.subjectLayer-by-layer assemblyen_US
dc.subjectSelf-assemblyen_US
dc.subject.lccQC611.8.N33 C53 2009en_US
dc.subject.lcshNanocrystals -- Optical properties.en_US
dc.subject.lcshSemiconductors -- Optical properties.en_US
dc.subject.lcshQuantum dots.en_US
dc.subject.lcshEnergy transfer.en_US
dc.titleLayer-by-layer self-assembled semiconductor nanocrystal composites with nonradiative resonance energy transfer for innovative architectural precise color tuning and controlen_US
dc.typeThesisen_US
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Dept. of Electrical and Electronics Engineering - Master's degree