The preparation of GaN:Er3+ nanoparticles and the optical performance analysis

GaN:Er3+ nanoparticles are synthesized by ammonification of a mixture of Ga2O3 and Er2O3 in three steps. The XRD result shows that three groups of samples predominantly presents hexagonal phase of GaN and its average grain size is 25.9 nm. SEM images show that the sizes of the particles are almost uniform. The sizes of the particles is 20–50 nm. The optic characteristics of the samples is tested in 380 nm photoluminescence(PL). From PL spectra, three characteristic peaks of Er3+ions are clearly observed in visible light region (375–650 nm), this prove the GaN:Er3+ nanoparticles possess good optical properties. Simultaneously, analyze the three samples in the 520 nm excitation spectrum. Among them, the sample of the doping molar concentration 6.25% achieved the most excellent optical properties.