Dependence of morphology and photoluminescent properties of GdPO4:Eu3+ nanostructures on synthesis condition

GdPO4:Eu3+ nanoparticles, nanowires and nanorods phosphors were successfully synthesized by a hydrothermal method. Their photoluminescent properties were investigated and compared. The results indicated that the one-dimensional nanowires and nanorods were formed as the pH value of precursor solution was 1, 5 and 9, while zero-dimensional nanoparticles were formed for the pH value of 9. The crystallization state of nanoparticles was relative lower and the crystal structure belongs to monoclinic phase for other samples. The charge transfer band (CTB) of Eu3+ ions in nanorods (for pH value of 13) clearly blue-shifted in contrast with other samples. The integrate intensity ratio of 5D0-7F2 to 5D0-7F1 in nanoparticles increased due to high disorder. The lifetime of 5D0 level of Eu3+ in nanoparticles decreased in comparison with other samples and radiative transition rate of 5D0-∑J7FJ increased.