Photoluminescence and conductive properties of CaEuNbMoO8 solid‐solution ceramics

Abstract Solid‐solution ceramics show a potential in the field of electronic devices. In particular, it is necessary to investigate the photoluminescence and conductive properties of CaEuNbMoO 8 (CENMO) solid solution ceramics. It is demonstrated that the sintered ceramics appear as CaMoO 4 phase with scheelite structure. The results of X‐ray photoelectron spectroscopy show that the abnormal reduction of Eu 3+ →Eu 2+ occurs in the ceramics, which is due to the formation of vacancy caused by the substitution of Ca 2+ by Eu 3+ , making it act as electron donors. The change of local symmetry of Eu 3+ ions in ceramics results in a strong red fluorescence, and the charge transition between Eu, Nb, and Mo ions and O ions in the host lattice results in the near‐ultraviolet (near‐UV) excitation. As a result, CaEuNbMoO 8 ceramic materials have promising applications in both near‐ultraviolet excited light‐emitting diodes and thermistors.