摘要： To demonstrate the power of Bumblebee, we will focus in this talk on thermally-activated delayed fluorescence (TADF) materials, which are also used in new generation hyperfluorescent (HF) OLEDs. In principle, obtaining an internal quantum efficiency (IQE) approaching 100% combined with a small efficiency roll-off should be feasible. However, the actual device performance depends on the balance between the transfer of singlet and triplet excitons from the TADF emitters to the fluorescent molecules, and on the role of excitonic loss processes. Here we demonstrate how KMC simulations can be used to successfully analyze, predictively model, and ultimately enhance the quantum efficiency of TADF-based OLEDs and their roll-off at large current densities. We will show how the concentration of the fluorescent dye affects the device performance and which changes in the properties of this material are needed to boost the device efficiency, thereby providing guiding directions for chemical material development and improvement.