Abstract

Organic light emitting diodes (OLEDs) have attracted much attention in the past few years due to their excellent performance in display devices and illumination devices. However, the low light extraction efficiency of OLEDs due to the light trapped inside the device still remains an important issue. Only 20% of generated light is extracted out from the device in conventional cases [1]. Various approaches have been used to improve the light extraction efficiency of OLEDs [2], one of which is to apply a scattering layer [3].

© 2016 Japan Society of Applied Physics, Optical Society of America