Effects of Er3+ doping concentration and calcination on fluorescence properties of La3Ga5.5Nb0.5O14 nanocrystals

The effects of Er3+ doping concentration and calcination were examined on the fluorescence properties of La3Ga5.5Nb0.5O14 (Er:LGN) nanoparticles for the first time. High quality Er:LGN nanoparticles were synthesized by sol-gel method. The room temperature fluorescence spectra showed a green emission, which can be attributed to 2H11/2-4I15/2 and 4S3/2-4I15/2 transition. The relationship between the relative emission intensity and the doping concentration was investigated. The maximum of the Er3+ doping concentration in LGN nanopowders is 2.0%. The fluorescent lifetime of 2.0% Er:LGN nanoparticles is 1.45ns. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)