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
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.