Optical Performance Improvement Mechanism of Multimode-Emitted White Resonant Cavity Organic Light-Emitting Diodes

A microcavity Fabry-Pe??rot resonator was constructed using a high reflective Al metal and SiO₂ -TiO₂ distributed Bragg reflector. Resonant cavity organic light-emitting diodes (RCOLEDs) were fabricated using the microcavity Fabry-Pe??rot resonator and the conventional organic light-emitting diodes. To improve the optical performances, four-mode emission of the RCOLEDs was resulted by using SiO₂ filler layer to extend the microcavity length. The improvement of the Commission Internationale d´Eclarirage and color-rendering index is attributed to the four-mode emission. The enhancement of brightness and luminance efficiency was attributed to the stimulated emission in the microcavity Fabry-Pe??rot resonator.