This example calculates the extraction efficiency and angular-dependent color shift from organic light-emitting diodes (OLEDs) using STACK. In display applications, it is important to reduce the angular dependence of the output light spectrum, as this allows the widest range of viewing angles with minimal color distortion. At the same time, it is important to increase light extraction efficiency. As we will see trade-offs must be made between these two goals. We will recreate the results from Tan et al [1], exploring the emission patterns of unpatterned micro-cavity pixel designs in STACK. Since STACK solves planar devices, it is extremely fast and can be used to rapidly iterate over device layer thicknesses and materials to optimize for spectral uniformity and light extraction efficiency. Finally, the results are output for use in Ansys Speos where designers can directly experience how nanoscale design choices affect human perception.
Read the full article here: https://optics.ansys.com/hc/en-us/articles/1500012946981