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Harnessing d-f transition rare earth complexes for single layer white organic light emitting diodes

Yanrui Liu, Paramaguru Ganesan, Peng Gao*



Therefore, the new class of d-f transition-based rare earth complexes present a promising strategy for realizing highly efficient OLED devices, particularly suitable for SLWOLEDs compared to moderate progress associated with f-f transition-based complexes. Observing the limited role of host materials in exciton energy transfer and reduced energy transfer from higher energy emitter to low energy emitter at higher doping concentration lays a significant foundation for exploring d-f transition-based rare earth complexes in single color and SLWOLEDs devices. Demonstrating the ambient stability of Eu2+ complexes through delicate ligand engineering strategies will facilitate leveraging the advantages of d-f transitions, such as short excited-state lifetimes and adjustable emission wavelengths, advancing this class of materials as the new generation rare earth complexes for OLED applications.

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