An efficient non-Lambertian organic light-emitting diode using imprinted submicron-size zinc oxide pillar arrays
Liu, S. W.
Wang, J. X.
Tan, S. T.
Demir, H. V.
Sun, X. W.
Applied Physics Letters
053305-1 - 053305-4
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Liu, S. W., Wang, J. X., Divayana, Y., Dev, K., Tan, S. T., Demir, H. V., & Sun, X. W. (2013). An efficient non-Lambertian organic light-emitting diode using imprinted submicron-size zinc oxide pillar arrays. Applied Physics Letters, 102(5), 053305.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/12043
We report phosphorescent organic light-emitting diodes with a substantially improved light outcoupling efficiency and a wider angular distribution through applying a layer of zinc oxide periodic nanopillar arrays by pattern replication in non-wetting templates technique. The devices exhibited the peak emission intensity at an emission angle of 40 degrees compared to 0 degrees for reference device using bare ITO-glass. The best device showed a peak luminance efficiency of 95.5 +/- 1.5 cd/ A at 0 degrees emission (external quantum efficiency-EQE of 38.5 +/- 0.1%, power efficiency of 127 +/- 1lm/W), compared to that of the reference device, which has a peak luminance efficiency of 68.0 +/- 1.4 cd/ A (EQE of 22.0 +/- 0.1%, power efficiency of 7261 lm/W). (C) 2013 American Institute of Physics.