Improved optical outcoupling of OLED microdisplays by nanostructured substrates

We present optical simulations of the light outcoupling efficiency of an OLED-anode design which allows the integration of a grating with high refractive index contrast into a topemitting OLED with standard CMOS technology. We demonstrate the effective coupling of the grating with the confined organic modes and therefore changing the outcoupling efficiency with respect to the planar OLED-stack.