• About
  • Policies
  • What is openaccess
  • Library
  • Contact
Advanced search
      Search 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • Search
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • Search
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Search

      Show Advanced FiltersHide Advanced Filters

      Filters

      Use filters to refine the search results.

      Now showing items 11-20 of 349

      • Sort Options:
      • Relevance
      • Title Asc
      • Title Desc
      • Issue Date Asc
      • Issue Date Desc
      • Results Per Page:
      • 5
      • 10
      • 20
      • 40
      • 60
      • 80
      • 100
      Thumbnail

      Enhanced exciton transfer from the cascaded bilayer of green-and red-emitting CdTe quantum dots into bulk silicon 

      Yeltik, Aydan; Güzeltürk, Burak; Demir, Hilmi Volkan (Optical Society of America, 2013)
      We show enhanced transfer of excitons from the energy-gradient of bilayered green/red-emitting quantum dots into silicon using cascaded nonradiative energy with an overall enhancement factor of 1.3 at room temperature for ...
      Thumbnail

      Excitonic energy transfer dynamics in hybrid organic/inorganic nanocomposites at high loading levels 

      Güzeltürk, Burak; Hernandez-Martinez, Pedro L.; Tuncel, Dönüş; Demir, Hilmi Volkan (Optical Society of America, 2012)
      Temperature dependent exciton migration in the hybrid nanocomposites of conjugated polymers chemically integrated with quantum dots is studied at high loading levels. The underlying interplay between the exciton transfer ...
      Thumbnail

      Tunable white light generating nanocyrstal-hybridized LEDs 

      Demir, Hilmi Volkan; Nizamoğlu, Sedat (IEEE, 2007)
      We hybridize CdSe/ZnS core-shell nanocrystals on InGaN/GaN near-UV/blue LEDs to generate light widely tunable across the visible spectral range and within the white region of the chromaticity diagram with adjustable ...
      Thumbnail

      Electric field dependence of radiative recombination lifetimes in polar InGaN/GaN quantum heterostructures 

      Sarı, Emre; Nizamoğlu, Sedat; Lee I.-H.; Baek J.-H.; Demir, Hilmi Volkan (IEEE, 2009)
      We report on external electric field dependence of recombination lifetimes in polar InGaN/GaN quantum heterostructures. In our study, we apply external electric fields one order of magnitude less than and in opposite ...
      Thumbnail

      Blue InGaN/GaN-based quantum electroabsorption modulators 

      Sarı, Emre; Nizamoğlu, Sedat.; Özel, Tuncay; Demir, Hilmi Volkan (IEEE, 2006)
      We introduce InGaN/GaN-based quantum electroabsorption modulator that incorporates ∼5 nm thick In0.35Ga0.65N/GaN quantum structures for operation in the blue spectral range of 420-430 nm. This device exhibits an optical ...
      Thumbnail

      Nanocrystal LEDs with enhanced external quantum efficiency enabled by the use of phosphorescent molecules 

      Mutlugün, Evren; Abiyasa, A.P.; Güzeltürk, Burak; Gao, Y.; Leck, K.S.; Sun X.W.; Demir, Hilmi Volkan (IEEE, 2013)
      We report efficiency enhancement in quantum dot (QD) based LEDs with the aid of excitonic energy transfer from co-doped TCTA:Ir(ppy)3 layer to CdSe/ZnS QDs while providing spectrally pure emission. © 2013 IEEE.
      Thumbnail

      High optical efficiency of ZnO nanoparticles 

      Tek, Sümeyra; Demir, Hilmi Volkan; Yucel, D.; Celiker G. (IEEE, 2007)
      We develop optically efficient photocatalytic ZnO nanoparticles that we chemically embed and well disperse into host PVAc thin films and experimentally demonstrate the highest optical efficiency of ∼70% in ZnO nanoparticle ...
      Thumbnail

      White light generating nonradiative energy transfer directly from epitaxial quantum wells to colloidal nanocrystal quantum dots 

      Nizamoğlu, Sedat; Sarı, Emre; Baek J.-H.; Lee I.-H.; Demir, Hilmi Volkan (Optical Society of America, 2009)
      We present white light generating nonradiative Förster resonance energy transfer at a rate of (2ns)-1 directly from epitaxial InGaN/GaN quantum wells to CdSe/ZnS heteronanocrystals in their close proximity at chromaticit ...
      Thumbnail

      Light-harvesting semiconductor quantum dot nanocrystals integrated on photovoltaic radial junction nanopillars 

      Güzeltürk, Burak; Mutlugun, Evren; Wang X.; Pey, K.L.; Demir, Hilmi Volkan (IEEE, 2010)
      Thumbnail

      Metamaterial-based wireless RF-MEMS strain sensors 

      Melik, Rohat; Ünal, Emre; Perkgoz, Nihan Kosku; Puttlitz, C.; Demir, Hilmi Volkan (IEEE, 2010)
      Approximately 10% of the fractures do not heal properly because of the inability to monitor fracture healing. Standard radiography is not capable of discriminating whether bone healing is occurring normally or aberrantly. ...
      • 1
      • 2
      • 3
      • 4
      • 5
      • . . .
      • 35

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartments

      My Account

      Login

      Discover

      Author
      Demir, Hilmi Volkan (349)
      Sun, X. W. (64)Nizamoglu, S. (38)Mutlugun, E. (31)Tan S.T. (31)Erdem, T. (29)Guzelturk, B. (25)Gao, Y. (24)Nizamoğlu, Sedat (21)Unal, E. (18)... View MoreKeywordsNanocrystals (49)Light emitting diodes (42)Semiconductor quantum dots (27)Energy transfer (23)Nanoparticles (22)Excitons (19)Quantum dots (19)Photoluminescence (18)Efficiency (17)Color (14)... View MoreDate Issued2010 - 2019 (272)2004 - 2009 (77)Has File(s)Yes (349)

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 1771
      Copyright © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy