Used as a phosphorescent emitter in organic light-emitting diodes (OLEDs), particularly in display and lighting technologies. Its strong spin-orbit coupling enables efficient triplet harvesting, resulting in high electroluminescence efficiency. Commonly doped into host materials to emit blue to green light with good color purity and stability. Also investigated in photocatalytic reactions and light-driven molecular devices due to its long-lived excited states and tunable redox properties.