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      Warm white light generating nanocrystal hybridized LEDs with high color rendering index

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      Author
      Demir, Hilmi Volkan
      Nizamoğlu, Sedat
      Zengin, Güliş
      Date
      2008-11
      Source Title
      Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 2008
      Publisher
      IEEE
      Pages
      200 - 201
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      By hybridizing custom-design CdSe/ZnS core-shell NC emitters on InGaN/GaN based blue LEDs, we demonstrated three warm-white light sources with desirably low CCT ranging from 3227 K to 1982 K as is required for SSL indoor applications. In these proof-of-concept demonstrations, high color rendering indices (82.4) and high luminous efficacies of emitted spectra (327 lm/W) were achieved, while the color temperature was simultaneously kept low as desired. Our proof-of-concept demonstrations indicated that such nanocrystal luminophor based warm-white LEDs with high-quality photometric properties hold great promise especially for future indoor lighting applications.
      Keywords
      Hybrid power systems
      Nanocrystals
      Light emitting diodes
      Temperature
      Stimulated emission
      Optical pumping
      Optical sensors
      Light sources
      Phosphors
      Zinc compounds
      Permalink
      http://hdl.handle.net/11693/26816
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/LEOS.2008.4688558
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
      • Nanotechnology Research Center (NANOTAM) 1006
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