Used as a phosphorescent emitter in organic light-emitting diodes (OLEDs), particularly in high-efficiency red or near-infrared emission layers. Its complex structure enables strong spin-orbit coupling due to the iridium metal center, allowing for efficient triplet exciton formation and light emission. Commonly employed in display technologies and solid-state lighting where high luminous efficiency and color purity are required. Also investigated in tandem OLEDs and for use in vapor-deposited small-molecule OLED architectures due to its thermal stability and film-forming properties.