Anneal-induced transformation of phase structure, morphology and luminescence of GdPO:Sm nanomaterials synthesized by a hydrothermal method.

GdPO·HO:xSm nanomaterials were synthesized via a facile hydrothermal method and the effects of Sm concentrations and annealing temperature on the crystal structures, morphologies, and luminescent properties were studied. Doping of Sm exhibited no obvious influence on the crystal structure for the non-annealed samples, which possessed a hexagonal structure and a nanorod shape. Under 401 nm excitation, GdPO·HO:xSm displays a typical emission band with several peaks at 560, 596, and 640 nm.