Used as a highly efficient phosphorescent emitter in organic light-emitting diodes (OLEDs), particularly in red and near-infrared emission layers. Its strong spin-orbit coupling enables effective triplet harvesting, resulting in high electroluminescence efficiency. Commonly employed in display technologies and solid-state lighting due to excellent color purity and thermal stability. Also investigated in photoredox catalysis and as a luminescent probe in biological imaging owing to its long emission lifetime and resistance to photobleaching.