Trigonal Planar Au@Ag3 Clusters Showing Exceptionally Fast and Efficient Phosphorescence in Violet to Deep‐Blue Region

Abstract We report here a series of original ligand‐supported trigonal planar Au@Ag3 clusters exhibiting bright solid‐state phosphorescence in violet to deep‐blue range (λmax=410–442 nm) with remarkably short decay times (0.36–1.36 μs) and up to 96 % emission quantum yield at 298 K.