The exceptional near-infrared luminescence properties of cuprorivaite (Egyptian blue)

Cuprorivaite (CaCuSi4O10, also known as Egyptian blue) exhibits an exceptionally high emission quantum efficiency in the near-infrared region (lmax=910 nm, UEM=10.5%) and a long excited state lifetime (107 ls); these properties make it appealing for several applications in the fields of biomedical analysis, telecommunications and lasers