Bright near-infrared (NIR) luminescent ceramic discs of Zn2SnO4:Cr3+, Eu3+were synthesized by a solid state method. The phase structure was checked by XRD. The photoluminescence and persistent luminescence decay properties of Cr3+, Eu3+-codoped samples were studied systematically. The photoluminescence and photoluminescence excitation spectra revealed that the NIR emission (centered at 800 nm) of Cr3+was significantly enhanced after the incorporation of Eu3+ions, which was attributed to the energy transfer from Eu3+ions to Cr3+. Moreover, the incorporation of Eu3+ions could effectively delay t...
