Enhanced light emission from top-emitting organic light-emitting diodes by optimizing surface plasmon polariton losses

Increasing the external quantum efficiency is currently an important goal in organic light-emitting diodes (OLED) research. Utilizing an altered optical design that involves a low refractive index hole transport layer in a monochrome green top-emitting OLED, the authors have managed to shift the surface plasmon polariton dispersion relation, which in turn decreases the power dissipated into lost evanescent excitations, thus enhancing the external quantum efficiency.