Novel Cr3+-doped double-perovskite Ca2MNbO6 (M = Ga, Al) phosphor: Synthesis, crystal structure, photoluminescence and thermoluminescence properties

Cu-doped borate glass co-doped with SnO2 nanoparticles is fabricated by melt quenching. The structure and morphology of the samples are examined by X-ray diffraction and field emission scanning electron microscopy. Up-conversion enhancement is observ