Abstract
An optical energy loss mechanism including the surface plasmon polaritons (SPPs) loss in organic light-emitting diodes (OLEDs) is introduced based on CPS theory. The theoretical calculations of power dissipation spectrum (PDS), power dissipation map (PDM) and the out-coupling efficiency (OCE) of OLEDs are proposed. MATLAB tools are applied to simulate the optical model and shows that a considerable proportion of SPP loss leads to the low EQE of the OLEDs especially when the distance from the light-emitting boundary to cathode is short, it can even account for up to 40% of the total energy. Wave guide (WG) loss and SPPs loss go aganist vs. distance from the light-emitting boundary to cathode, and there exists a optimized distance of OCE. Study of SPPs losses and power dissipation mechanism provides the theoretical basis to enhance OLED light-emitting efficiency. The OCE calculation results are <20%.
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