Browsing by Keywords "LED"

Now showing items 1-8 of 8

    • Brightly luminescent Cu-Zn-In-S/ZnS Core/shell quantum dots in salt matrices 

      Lox, J. F. L.; Eichler, F.; Erdem, Talha; Adam, M.; Gaponik, N.; Demir, Hilmi Volkan; Lesnyak, V.; Eychmüller, A. (De Gruyter, 2019)
      In the past decades cadmium-free quantum dots (QDs), among which are quaternary colloidal Cu-Zn-In-S/ZnS (CZIS/ZnS) core/shell nanocrystals (NCs), have attracted great scientific interest. Particularly, their low toxicity ...

    • Distance and position estimation in visible light systems with RGB LEDs 

      Demirel, I.; Gezici, Sinan (Elsevier, 2022-01-17)
      In this paper, distance and position estimation problems are investigated for visible light positioning (VLP) systems with red-green-blue (RGB) light emitting diodes (LEDs). The accuracy limits on distance and position ...

    • High-quality InP/ZnS nanocrystals with high photometric performance and their application to white quantum dot light-emitting diodes 

      Yang, X.; Tan, S. T.; Demir, Hilmi Volkan; Sun, X. W. (IEEE, 2012)
      Full visible range covering InP/ZnS core-shell nanocrystals with high photometric performance have been prepared. Making use of these nanocrystals, we demonstrate a white quantum dot LED with a high color rendering index ...

    • Novel nanocomposite coatings of nanoparticles 

      Toru, Refik Sina (Bilkent University, 2011)
      Incorporating nanoparticles into nanocomposite thin-films enables coatings with multi-functionality depending on the particle type and size, and the film morphology. These multiple functions may include, for example, ...

    • Possible plasmonic acceleration of LED modulation for Li-Fi applications 

      Guzatov, D. V.; Gaponenko, S. V.; Demir, Hilmi Volkan (Springer New York LLC, 2018)
      Emerging LED-based wireless visible light communication (Li-Fi) needs faster LED response to secure desirable modulation rates. Decay rate of an emitter can be enhanced by plasmonics, typically by an expense of efficiency ...

    • The role of ITO resistivity on current spreading and leakage in InGaN/GaN light emitting diodes 

      Sheremet, Volodymyr; Genç, M.; Elçi, M.; Sheremet, Nina; Aydınlı, Atilla; Altuntaş, İsmail; Ding, Kai; Avrutin, Vitaliy; Özgür, Ümit; Morkoç, Hadis (Academic Press, 2017)
      The effect of a transparent ITO current spreading layer on electrical and light output properties of blue InGaN/GaN light emitting diodes (LEDs) is discussed. When finite conductivity of ITO is taken into account, unlike ...

    • Ultraviolet-visible nanophotonic devices 

      Bütün, Bayram (Bilkent University, 2010)
      Recently in semiconductor market, III-Nitride materials and devices are of much interest due to their mechanical strength, radiation resistance, working in the spectrum from visible down to the deep ultraviolet region ...

    • White light generation with CdSe/ZnS core-shell nanocrystals and InGaN/GaN light emitting diodes 

      Nizamoğlu, Sedat; Özel, Sedat; Sarı, Emre; Demir, Hilmi Volkan (IEEE, 2006)
      We present hybrid white light sources that integrate CdSe/ZnS core-shell nanocrystals on blue InGaN/GaN light emitting diodes (LED). We report on the demonstrations of white light generation using yellow nanocrystals ...