Light‐Induced Dynamic Phosphorescence Based on Oxygen Consumption: Mechanism, Design Strategy, and Applications

Phosphorescence is a type of photoluminescence originating from the triplet state, characterized by a long lifetime, and has been applied in bioimaging, sensing, and encryption. Due to the oxygen‐sensitive nature of the triplet state, light irradiation can sensitize and consume molecular oxygen, creating an oxygen‐free environment that activates phosphorescence. This phenomenon is referred to as light‐induced dynamic phosphorescence based on oxygen consumption (LiDPOC). In this conceptual review, we summarize the molecular requirements for LiDPOC, including a long intrinsic triplet lifetime, high intersystem crossing (ISC) rate, and high phosphorescence quantum yield. We review the development of LiDPOC molecules, covering both transition metal complexes and organic compounds. Furthermore, we demonstrate the applications of LiDPOC materials. Finally, we discuss the prospects and challenges, highlighting the future potential of these systems.