Enhancing the Out-Coupling Efficiency of Organic Light-Emitting Diodes Using Two-Dimensional Periodic Nanostructures

<table>The vertical mode profiles of the ordinary OLEDs structures. (a) low-order modes (b) high-order modes.</table>

Advances in Materials Science and Engineering

Figure 7: Enhancing the Out-Coupling Efficiency of Organic Light-Emitting Diodes Using Two-Dimensional Periodic Nanostructures 