Macrocrystals of semiconductor nanocrystals for light emitting diodes

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buir.advisorDemir, Hilmi Volkan
dc.contributor.authorAkcalı, Halil
dc.date.accessioned2016-01-08T20:06:28Z
dc.date.available2016-01-08T20:06:28Z
dc.date.issued2013
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Graduate School of Engineering and Science of Bilkent Univ., 2013.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2013.en_US
dc.descriptionIncludes bibliographical references leaves 70-73.en_US
dc.description.abstractWorldwide energy consumption is rapidly increasing and general lighting constitutes an important portion of it. By considering most of the lighting sources to rely on fluorescent lamps today, solid-state lighting has a great potential especially with recent advances on efficiency and color quality of white light-emitting diodes (LEDs). One of the most promising approaches for the current white LED technology is based on the use of color-conversion materials. In recent years semiconductor nanocrystal quantum dots (NQDs) have arisen as an important class of color-convertors because of their tunable and superior optical properties and today there are various prototypes and commercial products. Recently, a new material system involving macrocrystals of NQDs has been introduced. In this thesis, different types of NQD macrocrystals are developed and studied for the white LED application. These macrocrystals of NQDs are produced by forming ionic salts in the presence of water soluble NQDs. This enhances the stability of NQDs wrapped in salt solids and allows for high integration capability in powder form to current LED technology employing commercial encapsulants. This thesis also includes a colorimetric study of white LEDs using such macrocrystals of NQDs to demonstrate high-quality white light with high color rendering index, low correlated color temperature, and high luminous efficacy of optical radiation.en_US
dc.description.degreeM.S.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T20:06:28Z (GMT). No. of bitstreams: 1 0007065.pdf: 3967906 bytes, checksum: e2d4faa34c3d613b00a336fe8cca9431 (MD5)en
dc.description.statementofresponsibilityAkcalı, Halilen_US
dc.format.extentxvi, 73 leaves, illustrations, graphsen_US
dc.identifier.urihttp://hdl.handle.net/11693/17092
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectQuantum dot incorporated macrocrystalsen_US
dc.subjectsemiconductor nanocrystalsen_US
dc.subjectwhite light-emitting diodesen_US
dc.subjectcolor scienceen_US
dc.subject.lccQC611.8.N33 A432 2013en_US
dc.subject.lcshNanocrystals--Optical properties.en_US
dc.subject.lcshSemiconductors--Optical properties.en_US
dc.subject.lcshQuantum dots.en_US
dc.subject.lcshLight emitting diodes.en_US
dc.titleMacrocrystals of semiconductor nanocrystals for light emitting diodesen_US
dc.typeThesisen_US

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Dept. of Electrical and Electronics Engineering - Master's degree