Defect Luminescence of Lanidide Oxybromide

The host of LaOBr,which has defect luminescence,was synthesized by high-temperature solid-state method.The XRD,photoluminescence and thermoluminescence were studied.Two band emission located in 400 nm and 450 nm were observed,and it was concluded that the band emissions were due to the defects of bromine comparing the fluoscence and thermally luminescence with LaFO,LaClO.The trap energies produced by bromine near(LaO)nn+ which have different structure,were calculated to be 0.74 eV,0.70 eV.