Near-Infrared Emitting Materials via Harvesting Triplet Excitons: Molecular Design, Properties, and Application in Organic Light Emitting Diodes

摘要

Near-infrared (NIR) emitting materials have attracted considerablernattention because of their potential applications in organic light emittingrndiodes, bioimaging, military, etc. The research on NIR-emitting materialsrnand devices is motivated by fundamental and practical applicationrndemands. In these developed NIR-emitting materials, transition metalrncomplexes, and thermally activated delayed fluorescence (TADF)rnmolecules, which can harvest triplet excitons, have exhibited significantrnpotential because their theoretical internal quantum efficiency canrnreach 100%. Herein, the development of these NIR-emitting materialsrnof transition metal complexes and TADF molecules is reviewed and,rnfurthermore, a clear outlook for a broad range of applications in manyrndisciplinary areas is provided.