Influence of annealing temperature on photoluminescence characteristics of Gd2O3:Eu/AAO nanowires

One dimensional Gd2O3:Eu nanowires with diameters of ∼100 nm were fabricated by anodic aluminum oxide (AAO) template method. Excitation and emission spectra, fluorescence dynamics of Gd2O3:Eu/AAO were studied. The results showed that the charge transfer band of Eu3+ in Gd2O3:Eu/AAO blue shifted with increasing annealing temperature and time. The decay time constant of 5D0–7F2 transition became longer with the increasing annealing temperature in Gd2O3:Eu/AAO. The 5D0–7F1 transition of Eu3+ ions in cubic phase had longer lifetime than that in amorphous phase. In contrast to the lifetime of 5D0–7FJ in the bulk powder, that in Gd2O3:Eu/AAO composite films increased.