Preparation and Luminescence Properties of Gd2Zr2O7∶Eu3+Red Phosphor via Sol-Gel Method
Gd2Zr2O7 cubic red phosphors doped with Eu3+ions at different concentrations were prepared by sol-gel method,and their crystal structure,morphology,luminescence properties,thermal stability water resistance and internal quantum efficiency were investigated.The results show that the synthesized samples hare pure phase,Eu3+replaces the site of Gd3+,and Eu3+ion occupies the asymmetric center position.Gd2Zr2O7∶Eu3+phos-phors can be well excited by blue light,with the best doped Eu3+ions concentration of 20％.The energy gap val-ue of the doping concentration of sample is 3.88 eV,the fluorescence lifetime is 1.33 ms,red color of high puri-ty and light color are not affected by temperature.At the same time,after being soaked in water for 72 h,it can maintain about 75％of the original strength,indicating that this oxide phosphor has good resistance to water.The internal quantum efficiency measured is about 70.90％,indicating that Gd2Zr2O7∶0.2Eu3+is a highly effi-cient phosphor.
sol-gel methodblue light excitationthermal stabilityresistance to waterrare earths
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