Structure, Morphology, and Optical-Luminescence Properties of Eu~(3+)- and Mn~(2+)-Activated ZnGa_2O_4 and MgGa_2O_4 Ceramics

摘要

1 Introduction Up to date spinel oxide compounds activated with transition or rare-earth elements are well-known phosphor materials applied in the different spectral range [1-9]. For instance, doping with chromium ions gives a phosphor material with a persistence luminescence in the near-infrared spectral range. The near-IR emission going along with chemical resistance and biocompatibility of ZnGa_2O_4 and MgGa_2O_4 compounds and makes them suitable biomarker materials [6,10-13]. Both ZnGa_2O_4 and MgGa_2O_4 spinels with manganese dopant are bright phosphors emitting in green spectral region [7, 14-17]. Spinels doped with rare-earth elements are a high-spot in display, WLED and solid-state lasers technologies [18-20].