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dc.contributor.advisorDemir, Hilmi Volkan
dc.contributor.authorYerli, Ozan
dc.date.accessioned2016-01-08T20:06:09Z
dc.date.available2016-01-08T20:06:09Z
dc.date.issued2013
dc.identifier.urihttp://hdl.handle.net/11693/17069
dc.descriptionAnkara : The Department of Physics 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 43-47.en_US
dc.description.abstractIn this thesis, we studied electronic structure and optical properties of Type-I, Type-II, and quasi Type-II semiconductor nanocrystals (also known as colloidal quantum dots). For a parametric study, we developed quantum mechanical models and solved them using both analytical and numerical techniques. The simulation results were compared to the experimental findings. We showed that charge carrier localization at di↵erent spatial locations could be tuned by controlling size parameters of the core and shell. While tuning charge localization, we also predicted photoluminescence peaks of these core/shell nanocrystals using our theoretical and numerical calculations. We demonstrated that Type-II nanocrystals exhibit di↵erent tuning trends compared to the Type-I ones. We also investigated biexcitonic properties of nanocrystals using quantum mechanical simulations, which are important especially in lasing applications. We showed that two-photon absorption mechanism can be tuned by changing the core and shell size in quantum dots. We calculated at which core and shell sizes biexcitons in quantum dots show attractive or repulsive interaction. The computational studies presented in this thesis played an important role in the experimental demonstrations and understanding of controlling excitonic features of core/shell nanocrystals.en_US
dc.description.statementofresponsibilityYerli, Ozanen_US
dc.format.extentx, 155 leaves, graphics, tablesen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectNanocrystalsen_US
dc.subjectquantum dotsen_US
dc.subjecttwo photon absorptionen_US
dc.subjectexcitonen_US
dc.subjectbiexcitonen_US
dc.subjectamplified spontaneous emissionen_US
dc.subject.lccQC611.8.N33 Y47 2013en_US
dc.subject.lcshNanocrystals--Optical properties.en_US
dc.subject.lcshSemiconductors--Optical properties.en_US
dc.subject.lcshQuantum dots.en_US
dc.subject.lcshExciton theory.en_US
dc.titleComputational study of excitons and biexcitons in semiconductor core/shell nanocrystals of type I and type IIen_US
dc.typeThesisen_US
dc.departmentDepartment of Physicsen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US


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