Theoretical Modeling and Analysis of the Contribution of the Near-Field Absorption to the Dipole Radiation Power in Top-Emitting Organic Light-Emitting Diodes

We theoretically model the near-field (NF) absorption for a multilayer micro-cavity (MMC) structure and investigate contribution of NF to dipole radiation power in top-emitting organic light-emitting diodes (OLEDs). The occurs due interaction between an evanescent wave with large in-plane vector planar metal layer vicinity radiation. analytical expressions MMC are derived from plane expansions electric field amplitude, which includes two-beam multi-beam interference terms. transverse magnetic polarization light emitted by both horizontally vertically oriented emitters is considered while neglected. Based on total spectral density calculated OLED, respective response functions surface plasmon (SP) modes compared, where summation Lorentzian line shape used represent responses SP modes. At values vectors, caused becomes significant approaches density. In addition, relative optical powers various dissipation mechanisms respect emitter position emission (EML), shows coupled predominant over other when distance EML/Ag interface less than 10 nm OLED.