Hydrothermal assisted synthesis followed by reduction route: Gd2O2S:Eu3+ hollow spheres and their photoluminescence properties

Herein, a homogeneous Gd2O2S:Eu3+ hollow spheres with pure phase structure were synthesized successfully through the calcination and reduction of the precursors prepared by hydrothermal method. It's worth noting that the non-template method is used to replace the traditional template method in this paper. The optimum calcination temperature of the precursor is 800 degrees C. FE-SEM and TEM observation indicate the target products are hollow spheres with a size range of 200-400 nm. When the doping concentration of Eu3+ is 7.50%, the luminescence intensity is the highest and its CIE coordinate fluorescence lifetime are (0.629, 0.370) and 1.114 mu s.