Light extraction modeling from organic light-emitting devices with microlens arrays

Microlens arrays attached on organic light-emitting diodes (OLEDs) substrate have been developed for the outcoupling enhancement in general illumination applications. Although microlens arrays work well to overcome light trapping, it is still challenging to determine the various optimization parameters due to heavy computational burden. In this work, we develop an efficient method combing transfer matrix method and ray-tracing technique for simulating layer structure with microlens arrays. Using a point source model, based on ray-tracing and round-trip calculation, the light outcoupling with the same microlens geometry is discussed in different color sources.