Determining emissive dipole orientation in organic light emitting devices by decay time measurement

► Decay time measurements of evaporated phosphorescent emitters. ► Discussion of Purcell effect as function of dipole orientation. ► Analysis of decay time w.r.t. dipole orientation, radiative and non-radiative decay rates. ► Comparison of emitters with and without preferential orientation. ► Simulation of outcoupling benefits of oriented emitters in OLEDs.