Synthesis And Optical Properties Of Neodymium Pentaphosphate Nanomaterials

The rare-earth nanocrystals dispersion has been widely used, and is a new liquid laser gain medium with great potential for the unique optical properties and good thermal dissipation. However, the large loss and low pump efficiency have been two bottlenecks which hinder the development. To solve problems aforementioned, we carried work from three aspects as follows.1 The study of the preparation of small size of LiNd(PO3)4 nanoparticles. By exploration the preparation conditions and the reaction mechanism, a method which use EDTA and CA as double complexing agent to systhesis the poly phosphate nanocrystals is developed.The LiNd(PO3)4 nanoparticles systhesised exhibit excellent optical properties, and the particle size is only about 30 nm. This study provide references on the preparation of small size of rare earth poly phosphate nanocrystals.2 The preparation of small size of NdP5O14 nanoparticles and the study on optical characteristics. The NdP5O14 nanocrystal is prepared for the first time, with an average size of 20 nm. The Nd3+concentration of the NdP5O14 is about 3.61×1021 ions/cm3, and at the same, the fluorescence lifetime is 114, which exhibitin a low concentration quenching effect.3 The preparation NdP5O14 nanodispertion and the study on optical characteristics.The NdP5O14 nanocrystal dispersion is obtained with the Dimethyl sulfoxide and 1,1,2,2-Tetrabromoethane as the dispersing agent with a Nd3+ concentration 1.0×1020 ions/cm3. The dispertion is relatively transparent, and the fluorescence performance was affected by solvents weakly. According to the Judd-Ofelt model, a quantum yield of 21.0% and large stimulated emission cross section of 8.4×10-20 cm2 were obtained for NdP5O14 microcrystals dispersion. In short, microcrystals and their dispersion possess of excellent integrated optical performance, and has potential application in optical gain medium and glass ceramics.