Trigonal Planar Au@Ag Clusters Showing Exceptionally Fast and Efficient Phosphorescence in Violet to Deep-Blue Region.

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