Now showing items 1-15 of 15

    • 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 ...
    • Color science and technology of novel nanophosphors for high-efficiency high-quality LEDs 

      Erdem, Talha (Bilkent University, 2011)
      Today almost one-fifth of the world‟s electrical energy is consumed for artificial lighting. To revolutionize general lighting to reduce its energy consumption, high-efficiency, high-quality light-emitting diodes (LEDs) ...
    • Colorimetry for LED lighting 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this Chapter, we explain the basics of colorimetry and introduce the colorimetric tools useful for designing light sources.
    • Common white light sources 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this Chapter we describe the features of common light sources. We first present the spectral features of the sun and discuss its colorimetric properties. Next, we summarize the properties of traditional light sources ...
    • Future outlook 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this final Chapter, we present a future perspective for the light source design. We discuss the existing problems and briefly introduce new material systems and device architectures that can overcome the current issues.
    • How to design quality light sources with discrete color components 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      White light sources using discrete emitters require careful design and optimization. The first step of the design should be determining the intended use of the light source so that application specific requirements can be ...
    • Large-area (> 50 cm × 50 cm), freestanding, flexible, optical membranes of Cd-free nanocrystal quantum dots 

      Mutlugün, Evren; Hernandez Martinez, Pedro L.; Eroğlu, Cüneyt; Coşkun, Yasemin; Erdem, Talha; Sharma, Vijay K.; Ünal, Emre; Panda, S. K.; Hickey, S. G.; Gaponik, N.; Eychmuller, A.; Demir, Hilmi Volkan (IEEE, 2012)
      Colloidal semiconductor quantum dots (QDs) have been extensively explored for numerous applications ranging from optoelectronics to biotechnology. This strong demand for the colloidal QDs arises because of their favorable ...
    • Light stimulus and human eye 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this Chapter, we summarize the structure of the human eye and introduce the sensitivity functions of various photoreceptors and present the visual regimes and corresponding eye sensitivity functions.
    • Metrics for light source design 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this part of this brief, we summarize the metrics that need to be considered for designing light sources. We start with metrics on the shade of color and then continue with color rendering and photometry.
    • Non-radiative energy-transfer-driven quantum dot LEDs 

      Güzeltürk, Burak; Erdem, Talha; Ünal, Emre; Nizamoğlu, Sedat; Tuncel, Donus; Demir, Hilmi Volkan (IEEE, 2010)
    • Novel light-emitting devices of semiconductor quantum dots and conjugated polymer nanoparticles 

      Erdem, Talha (Bilkent University, 2016-08)
      Starting with the modern times, lighting has become an essential part of our lives. Today, its share of the total energy consumption reaching 15% should not surprise us. This share further increases when the energy demand ...
    • On-Chip integration of functional hybrid materials and components in nanophotonics and optoelectronics 

      Erdem, Talha; Demir, Hilmi Volkan (John Wiley & Sons, 2011)
      Incorporation of custom - designed nanomaterial into nanophotonic devices and components in optoelectronic systems enables the realization of optical functionalities favorably controlled with external optical and electrical ...
    • Power conversion and luminous efficiency performance of nanophosphor quantum dots on color-conversion LEDs for high-quality general lighting 

      Erdem, Talha; Nizamoglu, Sedat; Demir, Hilmi Volkan (SPIE, 2012)
      For high-quality general lighting, a white light source is required to exhibit good photometric and colorimetric performance along with a high level of electrical efficiency. For example, a warm white shade is desirable ...
    • Superior warm-White light-emitting diodes integrated with quantum dot nanophosphors for high luminous efficacy and color rendering 

      Nizamoğlu, Sedat; Erdem, Talha; Sun, X. W.; Demir, Hilmi Volkan (Optical Society of America, 2011)
      Quantum dot nanophoshor hybridized warm-white LEDs are reported to exhibit high photometric performance of luminous efficacy exceeding 350 lm/Wopt and color rendering index close to 90 at correlated color temperatures <3000 ...
    • Ultrathin highly luminescent two-monolayer colloidal CdSe nanoplatelets 

      Delikanlı, Savaş; Yu, G.; Yeltik, Aydan; Bose, S.; Erdem, Talha; Yu, J.; Erdem, Onur; Sharma, Manoj; Sharma, Vijay Kumar; Quliyeva, Ulviyya; Shendre, S.; Dang, C.; Zhang, D.; Sum, T.; Fan, W.; Demir, Hilmi Volkan (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)
      Surface effects in atomically flat colloidal CdSe nanoplatelets (NLPs) are significantly and increasingly important with their thickness being reduced to subnanometer level, generating strong surface related deep trap ...