Used as a phosphorescent emitter in organic light-emitting diodes (OLEDs), particularly in red to near-infrared emission layers. Its strong spin-orbit coupling due to the iridium center enables efficient triplet harvesting, resulting in high electroluminescence efficiency. Commonly employed in display technologies and solid-state lighting where stable and efficient red emission is required. Also investigated in tandem OLEDs and for use in flexible and transparent devices due to its thermal stability and film-forming properties.