Iridium Complex Ligand Tuning for Saturated OLED Emission

The patent applies parameter changes by modifying the chemical structure of organic compounds, specifically developing iridium complex compounds with specific ligand configurations (Formula IA, IB, and II) to achieve saturated red, green, and blue emissions. The patent changes molecular parameters including ligand types (LA, LB, LC), coordination geometry, and electronic structure to tune emission wavelengths and achieve industry-standard color saturation.

The patent employs composite materials by creating iridium complex compounds composed of multiple ligand components (LA, LB, LC) with specific structures. These composite molecular structures combine different ligand functionalities to achieve the desired emission properties, where LA and LB are specific organic ligands and LC is a bidentate ligand, forming a composite complex with enhanced color saturation.

The patent changes the emission parameters of the organic compounds themselves to directly produce saturated colors, eliminating the need for absorption filters. By modifying the HOMO-LUMO energy gaps and molecular orbitals of the iridium complexes, the patent achieves direct emission of saturated red, green, and blue light, improving color quality without requiring complex filter assemblies.

The patent extracts and eliminates the need for absorption filter layers by developing compounds that emit saturated colors directly. Instead of using a white OLED with filters to produce colors, the patent removes the filter requirement by designing iridium complexes with intrinsic saturated color emission capabilities, simplifying the overall device structure while maintaining or improving color quality.