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Preparation and Spectral Performance of Nd:YbAG Nanocrystalline

Neodymium-doped ytterbium aluminium garnet(Nd:Yb3Al5O12, Nd:Yb AG) nanocrystalline was prepared by a co-precipitation method with ammonium bicarbonate as a precipitating agent. Effects of p H value of synthesis solution, calcination temperature and Nd doping amount on the phase composition, morphology and luminescence properties of the samples were investigated. The results show that the structure of the sample belongs to the Yb AG structure. The average size of Nd:Yb AG nanocrystalline is approximately 50 nm. The luminescence characteristics of Nd:Yb AG sample are superior at Nd3+ doping amount of 3.5%(mole fraction). The most intense upconversion blue light is obtained, which is corresponding to the 2G9/2 → 4I9/2 level transition of Nd3+. The most intense upconversion green light is procured at Nd3+ doping amount of 1.5%, which is corresponding to the 2G7/2 → 4I9/2 level transition of Nd3+. The optimal near infrared fluorescence performance is manifested at Nd3+ doping amount of 3.0%, which is corresponding to the 4F3/2 → 4I11/2 level transition of Nd3+.