A bright cadmium-free, hybrid organic/quantum dot white light-emitting diode
Leck, K. S.
Tan, S. T.
Abiyasa, A. P.
Demir, H. V.
Sun, X. W.
Applied Physics Letters
American Institute of Physics
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.