A bright cadmium-free, hybrid organic/quantum dot white light-emitting diode
Applied Physics Letters
American Institute of Physics
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Yang, X., Divayana, Y., Zhao, D., Leck, K. S., Lu, F., Tan, S. T., ... & Sun, X. W. (2012). A bright cadmium-free, hybrid organic/quantum dot white light-emitting diode. Applied Physics Letters, 101(23), 233110.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/13220
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/m(2) 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. (C) 2012 American Institute of Physics.