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 in the emissive layer to achieve bright and stable light output, especially in green to yellow-green regions. Also investigated for use in photocatalytic reactions and as a sensitizer in photoredox catalysis due to its long-lived excited states and favorable redox properties. Suitable for solution-processed and vacuum-deposited OLED devices.