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      • Dept. of Electrical and Electronics Engineering - Ph.D. / Sc.D.
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      •   BUIR Home
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      • Bilkent Theses
      • Theses - Department of Electrical and Electronics Engineering
      • Dept. of Electrical and Electronics Engineering - Ph.D. / Sc.D.
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      Excitonics of colloidal nanocrystals for next-generation optoelectronics

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      Embargo Lift Date: 2018-05-24
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      Author(s)
      Güzeltürk, Burak
      Advisor
      Demir, Hilmi Volkan
      Date
      2016-05
      Publisher
      Bilkent University
      Language
      English
      Type
      Thesis
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      Abstract
       
       
      Owing to the tremendous progress in the past decade, semiconductor nanocrystals that are grown by low-temperature solution-phase epitaxy have evolved into highly promising material systems for optoelectronics with ever increasing interest from the industry. However, fundamental challenges exist in conventional nanocrystals hampering their energy-efficient optoelectronic devices. In this thesis, we addressed important scientific problems and overcome various technological hurdles through optical physics discoveries and innovative nanomaterial processing. Specifically, we have proposed, designed and developed next generation of nanocrystals that exhibit superior optical and material properties than those of the conventional nanocrystals. Mastering intra- and inter-particle excitonic processes in these nanocrystals and their hybrids empowered us to control and tailor the desired photonic response. Our key achievements include demonstration of record high modal gain coefficients and giant nonlinear absorption cross-section in atomically-flat nanocrystals, ultralow-threshold all-solution processed quantum dot lasers and unprecedentedly strong exciton transport in self-assembled nanocrystals.
      Keywords
      Colloidal quantumdots
      Semiconductornanocrystals
      Nanoplatelets
      Exciton
      Nonradiativeenergytransfer
      Optoelectronics
      Laser
      Opticalgain
      Light- emitting diode
      Solarcell
      Light-harvesting
      Permalink
      http://hdl.handle.net/11693/29123
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      • Dept. of Electrical and Electronics Engineering - Ph.D. / Sc.D. 149
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