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Synthesis of CaAl2O4:Eu,Nd long persistent phosphor by combustion processes and its optical properties

2007; Elsevier BV; Volume: 61; Issue: 17 Linguagem: Inglês

10.1016/j.matlet.2006.12.015

1873-4979

Changliang Zhao, Donghua Chen,

Luminescence and Fluorescent Materials

Eu2+,Nd3+ co-doped calcium aluminate with high brightness and long persistent luminescence was prepared by the combustion method. The luminescent properties of CaAl2O4-based luminescent materials have been studied systematically. The phosphor powders were further investigated by X-ray diffractometer (XRD), photoluminescence excitation and emission spectra (PL) and brightness meter. The analytical results indicated that the phase of CaAl2O4 was formed when the initiating combustion temperature was 400 °C. The broad band UV excited luminescence of the CaAl2O4:Eu2+,Nd3+ was observed at the blue region (λmax = 440 nm) due to transitions from the 4f65d1 to the 4f7 configuration of the Eu2+ ion. The decay time of the persistence indicated that the persistent luminescence phosphor has bright phosphorescence and maintains a long duration.