Synthesis of uniform rare earth doped Gd2O2S sub-micron sized spheres using gas-aided sulfurization and their optical characteristics

We report a detailed study of the synthesis of sub-micron sized Gd₂O₂S spheres using a two-step process: (1) amorphous precursor synthesis using the solvothermal method; (2) crystallization to form Gd₂O₂S polycrystalline spheres in a sulfur-rich environment.