Investigation of Mode Coupling Effect on Emission Spectrum of Organic Emitter in Microcavity with Plasmonic Multilayered Films

Organic light-emitting diodes (OLEDs) are crucial for high-color rendering displays. We investigate the control of emission spectra by integrating microcavities with distributed Bragg reflectors (DBRs). FDTD simulations reveal spectral changes and improved light extraction. For simple metal microcavity structures, increasing Ag thickness narrows spectra and induces blue shifts. Combining DBRs with microcavities induces energy splitting due to the coupling of the microcavity mode with the Tamm plasmon mode generated at the Ag/DBR interface. Ag thickness optimization also enhances light extraction efficiency. Our findings underscore the potential of microcavity-DBR integration for precise spectral control and enhanced performance in OLEDs.