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      A bright cadmium-free, hybrid organic/quantum dot white light-emitting diode

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      Author
      Yang, X.
      Divayana, Y.
      Zhao, D.
      Swee Leck, K.
      Lu, F.
      Tiam Tan, S.
      Putu Abiyasa, A.
      Zhao Y.
      Demir, Hilmi Volkan
      Wei Sun, X.
      Date
      2012-12-06
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Publisher
      American Institute of Physics
      Volume
      101
      Issue
      23
      Pages
      233110-1 - 233110-4
      Language
      English
      Type
      Article
      Item Usage Stats
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      152
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      Abstract
      We report a bright cadmium-free, InP-based quantum dot light-emitting diode (QD-LED) with efficient green emission. A maximum brightness close to 700 cd/m2 together with a relatively low turn-on voltage of 4.5 V has been achieved. With the design of a loosely packed QD layer resulting in the direct contact of poly[N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl) benzidine] (poly-TPD) and 2,2′,2″-(1,3,5-benzinetriyl)-tris(1- phenyl-1-H-benzimidazole) (TPBi) in the device, a ternary complementary white QD-LED consisting of blue component (poly-TPD), green component (QDs), and red component (exciplex formed at the interface between poly-TPD and TPBi) has been demonstrated. The resulting white QD-LED shows an excellent color rendering index of 95.
      Keywords
      Color rendering index
      Direct contact
      Exciplexes
      Green component
      Green emissions
      White light emitting diodes
      Cadmium
      Luminance
      Light emitting diodes
      Permalink
      http://hdl.handle.net/11693/21185
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.4769347
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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